papa regional meetings 2013. meetings with papa in 2012: –january remove and replace defective...
TRANSCRIPT
PAPA Regional PAPA Regional MeetingsMeetings
20132013
Meetings with PAPA in 2012:– January
•Remove and Replace Defective Material
–May •Table “H” instituted after PAPA meeting
– June and August •Specification change discussions
–November •Meeting with Dr. James Burati
– January 2013 – NEW SPECIFICATION
Annual HMA Annual HMA PlacementPlacement
2012 HMA Summary2012 HMA Summary
• Number of Projects – 33• Total Lots - 1178
– Passing – 1077 (91 %)– Failures - 101 (9 %)
• Total JMF’s – 76 • Number of Plants - 24
2012 HMA Summary2012 HMA Summary
• LOT Failures – 101 –AC Low –17 –AC High –13–Voids Low –39 –Voids High – 37–#200 Low – 3–#200 High - 5
2012 HMA Summary2012 HMA Summary• Loose Box Samples Tested – 100
–Passing – 71 / Failed – 29•AC Low – 0 •AC High – 3•Voids Low – 20 •Voids High – 5•#200 Low – 0 •#200 High - 2
2012 HMA Summary2012 HMA Summary
• 12.5 mm – (451) Lots / 37 Failed–AC Low – 5–AC High – 8–Voids Low – 15–Voids High – 12–# 200 Low – 1–#200 High - 2
2012 HMA Summary2012 HMA Summary
• 19 mm – (422) Lots / 38 Failed–AC Low – 8–AC High – 4–Voids Low – 13–Voids High – 15–# 200 Low – 0–#200 High - 0
2012 HMA Summary2012 HMA Summary
• 9.5 mm – (164) Lots / 22 Failed–AC Low – 2–AC High – 0–Voids Low – 10–Voids High – 9–# 200 Low – 2–#200 High - 3
• 25 mm – (141) Lots / 4 Failed–AC Low – 2–AC High – 1–Voids Low – 1–Voids High – 1–# 200 Low – 0–#200 High - 0
2012 HMA Summary2012 HMA Summary
2013 – Specification 2013 – Specification ChangesChanges
• Release Material to Plant Operator or Lab Technician
• Eliminated #8 Sieve for Acceptance• 6” x 4 ¼” x 9” Box Sample Size• Provide Storage Shed / Field
Samples• Core Density Shall not Exceed 97%
2013 - Specification 2013 - Specification ChangesChanges
• Eliminated 19mm binder with 76-22 • Increased Wearing RAP to 15%• Eliminated F.A. “E” or “H” Requirement• Target Gmb Plugs at 115mm
(+/-)1.0mm• Rich Bottom Voids – Design at 4.0%
– Additional AC to achieve 2.5% Voids
• If Plant or Box Samples Fail for 3 Consecutive Days / Review JMF
20132013
• HMA - Back to Basics:– Plant and Field Sampling (PTM 746)– T-209 , T-312 , T-166
• Equipment– 8” / 12” sieves
•AASHTO T-30 – Max of 200g on each sieve smaller than the No. 4
AASHTO T-209AASHTO T-209
• Removed air trapped in the sample - under pressure (27.5 ±2.5 mm Hg) and maintain for 15±2 min
•Measure water temp and IF different from (77 ±2°F) use adjustment in Section 8.1
AASHTO – T-312AASHTO – T-312• Place compaction Mold and Base
Plate in an oven at the required compaction temp. for a minimum of 30 mins. prior to the estimated beginning of compaction.
• Place the mixture in the mold in one lift.
• Before reusing the Mold, place it in the oven for at least 5 mins.
PTM 715 / AASHTO T-PTM 715 / AASHTO T-166 166
• T-166 (Method A)– Immerse individual specimen for
4±1min.and record the immersed mass
– Remove specimen from the bath, damp-dry specimen by blotting with damp towel as quickly as possible (not to exceed 5 s) and determine surface-dry mass
PTM -746 (Hauling unit)PTM -746 (Hauling unit)
• EQUIPMENT:–A flat bottom, high sided scoop–Putty knife for scraping the INSIDE of the scoop
• Starting low on the pile and extending upward, sample the mixture by creating an approximate 2’ long and 3” to 4” deep vertical furrow.
PTM -746 (Hauling unit PTM -746 (Hauling unit con’t)con’t)If the mixture is sampled from at least two places in the truck, place the material removed in this manner on a mixing board, thoroughly mix, Form into a flat pile and quarter to provide a representative sample of the required size. Scrape the INSIDE of the scoop at each transfer point to incorporate any fines sticking to the inside of the scoop.
AASHTO R-47Reducing Samples of HMA to Testing Size
Mechanical Splitter for use in quartering HMA samples.
HMA Issues on Data HMA Issues on Data InputInput
• Wrong #200 C/F used when calculating gradation. When corrected – several gradations were out of Spec.
• Gradation on lower screen showed more material passing than previous screen
• Incorrect tolerance band used for gradations – correct band showed Six sieves with Deviations
HMA Issues on Data HMA Issues on Data InputInput
• Volumeter calibration changed Dry weight by 900g however the Volume remained the same?
• Gmb plugs indicated the Dry specimen weight was heavier than the SSD resulting in negative absorption – if you reverse the weights the Va failed
• Dry and SSD weights were exactly the same – no absorption? Field cores too!
HMA Issues on Data HMA Issues on Data InputInput
• Wrong Gmm used for density cores– 2.435 was used for 95.4% density.– Actual was 2.534 for 91.7% (Failure)
• 2 Gmb plugs had same weight– 1 plug absorbed 7g – 1 plug absorbed 23g– SAME Va % ???
HMA Issues on Data HMA Issues on Data InputInput
• Gmb plug heights outside of the 110mm-120mm range yet still showed passing Va%
• Gmb plugs always had 5g – 6g H2O absorption- no matter the plug weight or height variances
PTC Materials Data LibraryPTC Materials Data LibraryE-DEL (Electronic-Data Entry E-DEL (Electronic-Data Entry
Log)Log)
Bituminous –Data Entry Bituminous –Data Entry Log Log (Bit – DEL)(Bit – DEL)
Concrete – Data Concrete – Data Entry LogEntry Log
(Con-DEL)(Con-DEL)
Aggregate – Data Entry LogAggregate – Data Entry Log(Agg-DEL)(Agg-DEL)
20142014• PAPA website:
– BIT DEL program– HMA Design Software for 2013 Designs
•Materials Lab in Somerset : APPROVED– JMF approval
•Producer to Provide Aggregate/Oil/Design Data
•PTC Materials to Proof Design – Database for Future Designs
PTC Materials StaffPTC Materials Staff• East:(300-358 & A-20 – A-130)
• Steve Havrilla – [email protected]
• Central – (189-300)• Brian Wible –[email protected]
• West – (0-189)– Chris Forry- [email protected]
Our Company is Built on Our Company is Built on People – those who Work People – those who Work for Us and those We do for Us and those We do
Business with.Business with.
Harvey S. FirestoneHarvey S. Firestone
