![Page 1: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/1.jpg)
Seminar onMaintenance of Asphalt Pavements
Alan L. Gesford, P.E.Technology Transfer Specialist
Asphalt Patching
Michigan’s Local TechnicalAssistance Program
![Page 2: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/2.jpg)
2
Agenda1. Asphalt Pavement Patching and
Maintenance Objectives2. SHRP / LTPP
SHRP Studies & ResultsManual of Practice
3. Conventional Patching ProgramMaterialsEquipmentProcedure
![Page 3: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/3.jpg)
3
Agenda
4. Alternative InnovationsSelf Contained Patch UnitSpray Injection PatchingInfrared Patching
5. Patching ‘oil & chip” Roads6. Utility Cuts / Trench Restoration
![Page 4: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/4.jpg)
4
4 8 12 16YEARS
VERYGOOD
GOOD
FAIR
POOR
VERYPOOR
40% Quality Drop
40% Quality Drop
75% Time
17% Time
Deterioration / RehabilitationRelationship
![Page 5: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/5.jpg)
Deferring Maintenance Equals
Increased Costs
Then
Why Do We Defer?
![Page 6: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/6.jpg)
6
Maintenance Objectives vs. Asphalt Patching
Recognize DistressUnderstand CausesKnow Proper MaterialsKnow Proper Steps Consider Repair to be Permanent
![Page 7: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/7.jpg)
7
Maintenance Objectives vs. Asphalt Patching
Do It
the First time
Right
RightRight
![Page 8: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/8.jpg)
8
WATER, WATER, WATER
Need to take care of all water problems first!
Only then will all other repairs be cost effective!
![Page 9: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/9.jpg)
9
Types – Distresses - Repairs
Fatigue (alligator cracks)PotholesDepressionsSlippage RuttingCorrugation/ShovingEdge Deterioration
PatchingFull-Depth PatchingPartial Depth PatchingSurface (Temporary) Patching
Scratch / Leveling Courses (prep for overlay)
Milling
![Page 10: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/10.jpg)
10
Types – Distresses - Repairs
RavelingBleedingPolishing
Seal Coats / Surface Treatments
Chip SealsSlurry SealsMicrosurfacingNovaChip
Milling
Cracking Crack Sealing
![Page 11: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/11.jpg)
11
2 Main Elements of Asphalt Patching
Material SelectionRepair Procedures
“For each agency, different combinations of materials & procedures will produce optimum cost effectiveness.”
![Page 12: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/12.jpg)
12
Pothole Patching Program
1. Set-up for Safety2. Marking3. Cutting4. Cleaning
5. Tacking6. Filling7. Compacting8. Edge Sealing9. Cleanup
![Page 13: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/13.jpg)
13
Factors Effecting # of Steps in Pothole Repair
Safety & rideability (existing conditions)Level of trafficVariety of pavement typesTime of year Resources - personnel, materials, equipmentManagement philosophy (or knowledge)Time until overlay or rehabTolerance of public
![Page 14: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/14.jpg)
14
Prod
uctio
nPr
oduc
tion
Qua
lity
Qua
lity
Production vs Quality
TradeTrade--offs must be balanced!offs must be balanced!
Prod
uctio
nPr
oduc
tion Q
ualit
yQ
ualit
y
Prod
uctio
nPr
oduc
tion
Qua
lity
Qua
lity
Prod
uctio
nPr
oduc
tion
Qua
lity
Qua
lity
![Page 15: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/15.jpg)
15
SHRP/FHWA/LTPP Research
Strategic Highway Research Program
SS
RRHH
PP
Long Term Pavement Performance
LLTTPPPP
Federal Highway Administration
![Page 16: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/16.jpg)
16
SHRP Studies
H-105 Innovative Materials & Equipment for Pavement surface RepairH-106 Innovative Materials Development & TestingFHWA Long-Term Monitoring (LTM) of Pavement Maintenance Materials Test Sites
Final Report: LTPP Pavement Maintenance Materials: SHRP Crack Treatment Experiment, Final Report. FHWA-RD-99-142
http://www.fhwa.dot.gov/pavement/pub_listing.cfm?areas=LTPP
![Page 17: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/17.jpg)
17
SHRP Studies
“Bituminous hot mix has shown the longest service life of all materials when it is placed using permanent procedures in a dry hole.”
SHRP
![Page 18: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/18.jpg)
18
SHRPManual of Practice
Materials and Procedures for
Repair of Potholes in Asphalt-Surfaced
Pavements
Report No. FHWA-RD-99-168
underline
http://www.fhwa.dot.gov/pavement/pub_listing.cfm?areas=LTPP
![Page 19: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/19.jpg)
19
SHRPManual of Practice
“The patching operations described in this manual can be performed in any weather.”“The materials and procedures discussed are for cold-mix stockpiled materials and for spray-injection patching devices”“The goal of winter patching is to restore rideability and safety as quickly as possible (not to repair the distress permanently)”
![Page 20: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/20.jpg)
20
SHRPManual of Practice
“The use of hot-mix asphalt concrete, although recognized as a preferred alternative for patching operations, is not covered in this manual.”
![Page 21: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/21.jpg)
21
SHRPManual of Practice
MaterialsConventional Cold MixesProprietary Cold MixesSpray Injection
……an agency must verify the quality of materials used……..
![Page 22: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/22.jpg)
22
SHRP Manual Repair Techniques
1. Throw-and-rollPlace material in holeCompact with truck tiresOpen to traffic
![Page 23: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/23.jpg)
23
SHRP Manual Repair Techniques
2. Semi-permanent repairRemove water & debrisSquare up sides, vertical cutsPlace mixCompact - device smaller than patchOpen to traffic
![Page 24: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/24.jpg)
24
SHRP Manual Repair Techniques
3. Spray injectionBlow out water & debrisSpray tack on sides & bottomBlow asphalt & aggregate into holeCover patch with aggregate layerOpen to traffic
![Page 25: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/25.jpg)
25
Asphalt Patching Programs
Conventional PatchingMaterialsEquipmentProcedures
![Page 26: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/26.jpg)
26
Conventional Asphalt Patching Program
Materials:1. Conventional Hot-Mix2. Cold Stockpile Mix3. Tack4. Edge Seal
![Page 27: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/27.jpg)
27
Conventional Hot Mix
Stone or + Sand + Asphalt CementCrushed Gravel
Heat and mix in plant @ 380o F
![Page 28: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/28.jpg)
28
Cold Stockpile Mix
3/8 in. Stone or + Sand + Emulsion orCrushed Gravel Cutback
Heat and mix in plant @ 140o F
![Page 29: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/29.jpg)
29
Asphalt Patching Program
Cold Mix Requirementsa. Pliable in stockpileb. Cannot drain in stockpilec. Easy to shovel & compactd. Retain asphalt coatinge. Stable under traffic
![Page 30: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/30.jpg)
30
Asphalt Patching Program
Opposing Demandsgradationaggregate shapeasphalt binderbinder content
![Page 31: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/31.jpg)
31
Asphalt Patching Program
Cold Stockpile MixAsphaltAsphalt
CementCement
![Page 32: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/32.jpg)
32
Asphalt Patching Program
TackingEmulsions:
SS-1SS-1h
Can be used on damp surfaceApply with brush or sprayUse with hot-mix asphalt only
![Page 33: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/33.jpg)
33
Asphalt Patching Program
TackingCutbacks:
Winter Use OnlyBrush or Spray
![Page 34: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/34.jpg)
34
Asphalt Patching Program
Edge SealingEmulsions
SS-1, SS-1hCutback
RC-250, RC-800Asphalt Cement
AC-20
![Page 35: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/35.jpg)
35
Asphalt Patching Program
1. Set-up for Safety2. Marking3. Cutting4. Cleaning
5. Tacking6. Filling7. Compacting8. Edge Sealing9. Cleanup
![Page 36: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/36.jpg)
36
Asphalt Patching Program
Markingform of communicationexcess cutting costs materials & crew hoursinsufficient cutting means poor repairmay need to modify original marking
![Page 37: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/37.jpg)
Marking: May include several adjacent potholes or deteriorated areas
![Page 38: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/38.jpg)
38
Asphalt Patching Program
Marking: Does not have to be square or rectangle
![Page 39: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/39.jpg)
39
Asphalt Patching Program
Cuttingremove all weak, deteriorated areacut…. “vertical sides”
![Page 40: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/40.jpg)
40
Asphalt Patching Program
Vertical Sides for Confinement:
Confinement
Shoving
![Page 41: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/41.jpg)
41
Asphalt Patching Program
Vertical Sides for Compaction:
![Page 42: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/42.jpg)
42
Asphalt Patching Program
Cutting EquipmentAir compressorHydraulic BreakerGasoline Powered BreakerMilling Machines Saws
![Page 43: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/43.jpg)
Cutting Equipment
Jack Hammer – Air Compressor
Hydraulic Breaker
![Page 44: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/44.jpg)
Cutting Equipment
Gasoline-Powered Breaker Milling Machines
![Page 45: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/45.jpg)
Cutting Equipment
Carborundum Saw
Concrete Saw
![Page 46: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/46.jpg)
46
Asphalt Patching Program
Cuttingleave firm material around repairdo not outline area to be cut with cutting tool , begin at center of hole
Do NOT Rock!!
Edge of Hole
Begin atCenter
![Page 47: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/47.jpg)
47
Asphalt Patching Program
Modification of Marking
Poor BondRemove
Original Mark
![Page 48: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/48.jpg)
48
Asphalt Patching Program
Cutting BitsSharp bits improve productionSharp bits do less damageExchange dull bits
![Page 49: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/49.jpg)
49
Asphalt Patching Program
Cleaningremove loose materialremove waterpay attention to cornersuse air if availableotherwise stiff broom
![Page 50: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/50.jpg)
Remove Failed
Pavement
Remove To Sound Material
![Page 51: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/51.jpg)
51
Asphalt Patching Program
Sometimes the problem may not be evident on the surface.Remove waterAdditional drainage may be required to solve this problem.
![Page 52: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/52.jpg)
52
Asphalt Patching Program
Replace with good material similar to the material in the original pavementDeteriorated aggregate base or subbase material plus subgrade soils may need to be replaced
![Page 53: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/53.jpg)
53
• Testing for quality control may be required
Asphalt Patching Program
![Page 54: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/54.jpg)
54
Asphalt Patching Program
Tackingtack for hot mix onlylet cure
emulsions - water evaporatescutback - thinner evaporates
![Page 55: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/55.jpg)
Tacking
YES!Spray
YES!Brush
NO !Pour
Thin
Thin
Bead
Puddle
![Page 56: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/56.jpg)
56
Asphalt Patching Program
FillingShovel or dump material directly in holeTamp material into edges and corners with square-edge shovelMax. lift - 3 inches
![Page 57: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/57.jpg)
57
Asphalt Patching Program
Filling: Use a lute (no garden rakes)
Tamp
Segregation
Maximum Lift 3”
![Page 58: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/58.jpg)
58
Asphalt Patching ProgramEquipment: Hotboxes, maintainers, reclaimers
![Page 59: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/59.jpg)
Hot asphalt feed at shovel level for easy access
![Page 60: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/60.jpg)
“The Reclaimer”
Heats cooled hot-mix for reuse
![Page 61: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/61.jpg)
61
Asphalt Patching Program
Large patches demand large equipment
![Page 62: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/62.jpg)
62
Asphalt Patching Program
Compactionmost importantpoor compaction will give depression under trafficpoor compaction will cause raveling and shoving
![Page 63: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/63.jpg)
63
Asphalt Patching Program
Compaction EquipmentVibratory platePortable vibratory drum Self-propelled rollerGasoline poweredHand tamper
![Page 64: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/64.jpg)
Vibratory Plate
![Page 65: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/65.jpg)
Portable Vibratory Roller
![Page 66: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/66.jpg)
Self-propelled
![Page 67: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/67.jpg)
Self-propelled
‘The larger the patch, the larger the compaction equipment needed for proper compaction & rideability’
![Page 68: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/68.jpg)
Gasoline Powered
Hand Tamp
![Page 69: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/69.jpg)
69
Asphalt Patching Program
For deep patches, each layer (subgrade, subbase, base, paving) requires compaction!
![Page 70: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/70.jpg)
70
Asphalt Patching Program
Compaction
![Page 71: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/71.jpg)
71
Asphalt Patching Program
Compaction
Step 1. Pinch against edges Step 2. Roll patch
![Page 72: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/72.jpg)
72
Asphalt Patching Program
CompactionBridging
Follow Pavement Ruts
![Page 73: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/73.jpg)
73
Asphalt Patching Program
Final Compaction1/4”
Good Compaction
![Page 74: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/74.jpg)
74
Asphalt Patching Program
Edge Sealingkeeps water outavoid excess seal materialdo not edge seal cold mixblot if necessary
![Page 75: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/75.jpg)
75
RuttingCauses
Consolidation or lateral movement of the subgrade, aggregate base, and/or asphalt layers under traffic.Insufficient design thickness.Lack of compaction.Weakness caused by moisture.Movement of the mixture under heavy wheel loads.
![Page 76: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/76.jpg)
Rutting: Weak Base /Subgrade
originalprofile
weak subgrade or underlying layer
asphalt layer
subgradedeformation
Rutting in the Subgrade or Subbase
![Page 77: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/77.jpg)
Need to Reconstruct (or fill rut & overlay or mill & overlay
to increase pavement thickness)
originalprofile
weak subgrade or underlying layer
asphalt layer
subgradedeformation
![Page 78: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/78.jpg)
Rutting: Weak Asphalt Pavement
Consolidation
originalprofile
weak asphalt layer
Plastic Flow
weak asphalt layer
originalprofile
![Page 79: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/79.jpg)
Need for Scratch & Levelingor Milling
A scratch course is used to fill ruts before placing an overlay
![Page 80: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/80.jpg)
Need for Scratch & Levelingor Milling
A Leveling Course provides a level uniform platform for new paving and insures uniform density throughout the mat.
![Page 81: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/81.jpg)
Need for Scratch, Levelingor Milling
Material milled off prior to placing overlay
![Page 82: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/82.jpg)
82
If you do not Scratch, Level or Mill…
Failure to scratch, level, or mill prior to placing the overlay results in areas of greater thickness
and will lead to ……………..
![Page 83: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/83.jpg)
83
Failure to Scratch, Level or Mill
... reoccurrence of rutting
![Page 84: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/84.jpg)
Need for Milling & then overlay
Plastic flow material
Lift delineation
![Page 85: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/85.jpg)
85
Asphalt Patching Programs
InnovationsSelf-Contained Pothole Patching VehiclesAsphalt Spray Injection PatchingAsphalt Infrared Patching
![Page 86: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/86.jpg)
Self-Contained Pothole Patching Units
![Page 87: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/87.jpg)
Self-Contained Pothole Patching Unit
![Page 88: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/88.jpg)
Cut out deteriorated material (vertical sides)
![Page 89: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/89.jpg)
Remove all loose material
![Page 90: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/90.jpg)
Blow out remaining fine material, dust
![Page 91: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/91.jpg)
Apply tack – watch the overspray!
![Page 92: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/92.jpg)
Fill with hot-mix asphalt from hot box
![Page 93: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/93.jpg)
Compact patch
![Page 94: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/94.jpg)
What’s your Goal?
Nice permanent patch!
![Page 95: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/95.jpg)
Infrared Asphalt Heater
![Page 96: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/96.jpg)
96
Asphalt Patching Program
Infrared Asphalt PatchingSurface distress repairSoften existing asphalt area with infrared heat, rake in new material as needed, and compactEliminates cutting out and hauling away deteriorated materialEliminates tack coatingResult is a seamless repair
![Page 97: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/97.jpg)
Infrared Asphalt Heaters
![Page 98: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/98.jpg)
Infrared Asphalt Heaters
Hot -box
Joint Heaters
![Page 99: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/99.jpg)
The infrared heating unitis lowered to within 6" of the pavement.
![Page 100: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/100.jpg)
The infrared heat penetratesthe existing asphalt approximately 2".
![Page 101: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/101.jpg)
Having heated the area to be repaired, the softened asphalt is raked and cleared of
impurities.
![Page 102: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/102.jpg)
Hot asphalt is added toand blended with the original asphalt.
![Page 103: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/103.jpg)
The edges are rolled first to bond the new asphalt with the original asphalt. The entire
area is then compacted.
![Page 104: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/104.jpg)
The repair becomes aseamless part of the original asphalt
![Page 105: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/105.jpg)
105
Asphalt Spray Injection Patching
Cleans, tacks, fills and compacts with a one-person operationEliminate ‘cold patch’Year-round emergency adverse weather patchingImproved productivity and safetyUsed for both asphalt and cement concrete pavements
![Page 106: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/106.jpg)
Spray Patchers*Trailer .
*Truck Mounted *Self-Contained
![Page 107: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/107.jpg)
![Page 108: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/108.jpg)
![Page 109: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/109.jpg)
Blow out all loose material
![Page 110: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/110.jpg)
Apply emulsion tack
![Page 111: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/111.jpg)
Fill with aggregate /emulsion mix (No compaction needed)
![Page 112: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/112.jpg)
Finish with a fine cover aggregate if needed
![Page 113: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/113.jpg)
Finished spray patch
![Page 114: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/114.jpg)
114
Patching ‘Oil & Chip’ Roads
Build-up “Oil & Chip” Roadsmore flexible type pavementhot-mix may be too “rigid”
![Page 115: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/115.jpg)
Alternate #1Alternate #1
![Page 116: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/116.jpg)
Alternate #1Alternate #1
![Page 117: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/117.jpg)
Alternate #2Alternate #2
![Page 118: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/118.jpg)
Alternate #2Alternate #2
![Page 119: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/119.jpg)
119
Utility Cuts / Trench Restoration
Proper Restoration is Necessary!!!Infrastructure InvestmentSafetyLiabilityPublic Relations
![Page 120: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/120.jpg)
120
Utility Cuts / Trench Restoration
The GOAL is to restore your street or road to its
Original Condition!
![Page 121: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/121.jpg)
121
Backfilling
Fine Aggregate to Protect FacilityAggregate Backfill - Select Granular MaterialFlowable-Fill
Material
![Page 122: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/122.jpg)
122
Backfilling
Flowable-Fill(Controlled Low-Strength Material – CLSM)(Low Density Backfill)A blend of cement, sand, water, plus fly ash,
designed as a low strength, flowable material for backfill and other uses
Delivered by cement concrete trucks
![Page 123: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/123.jpg)
123
Backfilling
Flowable-Fill AdvantagesSelf leveling, filling all voidsNo placing in lifts, no compaction needed – less equipmentDesigned to allow for re-excavationLoad bearing capacity typically higher than compacted granular backfillRequires less field inspection
![Page 124: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/124.jpg)
![Page 125: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/125.jpg)
![Page 126: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/126.jpg)
126
BackfillingFlowable-Fill Spec
Develop specificationMany State DOTs now have spec
![Page 127: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/127.jpg)
127
BackfillingExcavated Material for Reuse
3” Maximum SizeNot Water SaturatedReadily Compacted 6 to 8 inch layers –proper moisture contentNo Puddling
![Page 128: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/128.jpg)
128
Backfilling
Inspection to insure compacting in layersDensity tests:
95% density – define test methodPermittee responsible for testingLarge projects or deep trenches
![Page 129: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/129.jpg)
129
Paving Restoration‘In-kind’ Restoration Final Cut - Shelf Back 6 to 12 inches for Clean EdgeCompacted Asphalt Layers of 3 inches maximumTack Coat - EmulsionsEdge Seal - Emulsions
![Page 130: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/130.jpg)
Select Granular Material
Insulating Material
1’-0”Typ.
Asphalt Base
ExistingAsphalt Base
Asphalt Wearing Course
Typical Final Restoration (Asphalt Base)
Asphalt Surface
![Page 131: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/131.jpg)
131
Multiple Excavations4+ in 100 Linear Feet of RoadOverlay total area of all travel lanes affectedMay require milling prior to overlay
![Page 132: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/132.jpg)
132
Steel Plates
![Page 133: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/133.jpg)
133
Maintaining Traffic
Temporary Plates:Steel protection plates / prefab light weight platesSized to provide adequate bearing at plate edgesSecurely anchoredSufficient thickness to carry heavy trafficExposed plate edges feathered with asphalt
Length of use could dictate milling bearing area & setting plate level with street surface
![Page 134: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/134.jpg)
134
H20 Load Rated
Skid Resistant diamond plate surface
Orange color for visibility
Lightweight – carried by one or two people
Different sizes up to 4’x 8’
Comcore
Pre-fab PlatesComcore
Comcore
Comcore
![Page 135: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/135.jpg)
135
Pre-fab Plates converted to
Trench Shoring
Pre-fab Plates
![Page 136: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/136.jpg)
136
Temporary Restoration
Necessary - wintertimeRequired - anytimeTypical Standard
Select Granular Material
Insulating Material
2” Min. Asphalt Material
![Page 137: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/137.jpg)
137
Other Requirements
Test Holes (4 Inch Diameter or Less)Backfill to Meet Existing Materials and Seal
No equipment with metallic treads allowed on road surface or surfaced shoulderMinimum depth of cover (e.g. 3 feet from road surface)
![Page 138: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/138.jpg)
‘Throw and roll’
‘Throw and go’
Is your goal temporary patching?
![Page 139: Gesford - Asphalt Patchingmichiganltap.org/sites/ltap/files/workshops/materials/... · 2015. 7. 27. · “Bituminous hot mix has shown the longest service life of all ... Conventional](https://reader034.vdocuments.site/reader034/viewer/2022052019/60325b575aa45a3265776247/html5/thumbnails/139.jpg)
139
Summary
Meet your goals and expectationsUse appropriate materialsUse proper proceduresWork safely
?’sDiscussion!