pavement rehabilitation resonant rubblizing. what is rubblizing? the process of fracturing pavement...
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PAVEMENT REHABILITATIONPAVEMENT REHABILITATION
RESONANT RUBBLIZINGRESONANT RUBBLIZING
What is Rubblizing? The Process of Fracturing Pavement of Portland Cement
Concrete into Angular Pieces for Direct Overlay
Application of Recycling the Concrete Pavement (Rubblizing)
Environmentally Friendly Construction
5
1
4
3
2
PSI
Number of Years
Reflection: Evolution of the Deterioration
Quality of the Road
5
1
4
3
2
PSI
Number of Years
Quality of the Road
Rehabilition of Concrete Pavement
Rubblizing
Rehabilition of Concrete Pavement
Rubblizing
Rehabilition of Concrete Pavement
Rubblizing
Rehabilition of Concrete Pavement
Structural Design: Correlations
Structural Failure Reflective Cracking100
0
Prob
abili
tyof
Fail
ure
Low PCC Modulus HighSmall Nominal Fragment Size Large
Target Zone
Structural Failure Reflective Cracking100
0
Prob
abili
tyof
Fail
ure
Low PCC Modulus HighSmall Nominal Fragment Size Large
Target Zone1 to 8”
DESCRIPTION OF TECHNICAL RUBBLIZING
Description of Rubblizing Equipment
Pedestal / Shoe
Resonant Beam
Weight
Flotation Tires
MotorComputer Controls
Description of Resonant Beam
Frequency 44 Hz Amplitude 1.905 cm
Vibration TechnologyWeight
Vibration TechnologyWeight
Frequency 44 Hz Amplitude 1.905 cm
Description of Resonant Beam
Frequency 44 Hz Amplitude 1.905 cm
Vibration TechnologyWeight
Description of Resonant Beam
Operational Data of Equipment• Strikes PCC 44 Times per Second.• 2,000 lbs. of Pressure Per Strike.• Beam Weighs 4080 kg.• Beam Raises 1.905 cm Per Strike.• Machine Speed at Approx. 6-8 km/hr.• Breaking Area is around 25 cm wide.• Maximum of 4,000 to 5,000 square
meters of rubblized concrete per day with a crew of two Resonant Machines.
STRUCTURAL DESIGN
Structural Design: Methods AASHTO – Procedure Design (SN) Asphalt Institute – Series Manuals (MS) -17 NAPA – Series Information (IS) –117 Airfield Asphalt Pavement Technology Program - AAPTP
Structural Design: State Studies
Over 20 Studies from Multiple States support that rubblizing provides:
Long life for surfaces – 22+ yearsSmooth driving conditionsRubblization eliminates reflective cracking and dramatically reduces surface defects
Alabama
Michigan
Pictured is pavement after years of use and deterioration.
Expert analysis is required to determine the cause of the failure of the pavement.
If the damage does not arise from the Subgrade or SubBase, the pavement is a candidate for Rubblization.
If there is a problem with the
Subgrade, Rubblization will not eliminate the issue.
Structural Design: Evaluation
Structural Design: Drainage
A Proper Drainage System should be Installed or Repaired prior to Rubblizing the pavement.
Varying Methods of Drainage can be used depending on the Site.
Structural Design: Drainage
10 cm open-graded5 cm dense-graded
# 57 Stone
3 % Slope Outlet
Filter Fabric
Shoulder Area
Rubblized PCC
Base Course
Subgrade
Permeable Zone
Relief Cut @ 9-12 m.
The Modulus of the Rubblized Concrete depends on the Thickness, Subbase and Subgrade. Typically Rubblized Concrete is 2.5 Times Stronger than any Granular Material.
E1
E3 > E2
E4 > E3
Where E3 = f(E2)
Where E2 = f(E1)E2 > E1Subbase
Subgrade
Structural Design: Scope
Coefficient Structure (ai) vs. Modulus (Mr) AASHTO
Structural Design: Coorelations
CONSTRUCTION
PROCESS
Rubblizing ProcessThree Stages of Construction:
Rubblizing Rolling Asphalt Overlay
Prior to Rubblizing Process
Repair or Replace the Drainage System
Remove any Asphalt Overlay Currently in Place
Resonant Rubblizing Breaking area between 15.24 and 30.48 cm Wide Ideal Distance Per Run - One Kilometer/ One Lane Wide Speed of Resonant Machine 6 to 8 km/hr
Test Pit
Confirm Specification and Debonding
Wright Patterson
10 Ton High Frequency, Low Amplitude Steel Drum Roller (3 Passes) Only Equipment Necessary After Rubblization Not Recommended to Drive on Prior to Asphalt Overlay
Rolling
Asphalt Layer Leveling Course on First Lift with Ability to Open Traffic No Primer Required on Rubblized Layer Minimum of 12.7 cm of Asphalt Overlay
Next Day - Open Traffic
Recommended State Specification High Frequency Low Amplitude Resonant Breaker
Resonant Breaker shall apply 2,000 lbs of pressure per strike at 44 hertz
Removal of any Existing Asphalt Overlay
Majority of the Particle Size Less than 15.24 centimeters
Maximum Particle Size of 20.32 centimeters
10 Ton High Frequency - Low Amplitude Vibratory Roller
3 Passes with Maximum Speed of 1.82 meters/second
Minimum of 80% Debonding of Existing Steel Reinforcement
No Traffic on Rubblized Slab Until First Lift is Placed
Minimum of 12.7 cm of Hot Mix Asphalt Overlay
Results – 22 Year Road