1. PAVEMENT REHABILITATION
RESONANT RUBBLIZING

2. What is Rubblizing?
The Process of Fracturing Pavement of Portland Cement Concrete into Angular Pieces for Direct Overlay

4. Application of Recycling the Concrete Pavement (Rubblizing)
Environmentally Friendly
Construction

5. Reflection: Evolution of the Deterioration
PSI 5 1 4 3 2
Quality of the Road
Number of Years

6. Rehabilition of Concrete Pavement
PSI 5 1 4 3 2
Quality of the Road
Number of Years

7. Rehabilition of Concrete Pavement
Rubblizing

8. Rehabilition of Concrete Pavement
Rubblizing

9. Rehabilition of Concrete Pavement
Rubblizing

10. Structural Design: Correlations
1 to 8”

11. DESCRIPTION OF TECHNICAL RUBBLIZING

12. Description of Rubblizing Equipment
Weight
Computer Controls
Motor
Resonant Beam
Flotation Tires
Pedestal / Shoe

13. Description of Resonant Beam
Weight
Vibration Technology
Frequency 44 Hz
Amplitude cm

14. Description of Resonant Beam
Weight
Vibration Technology
Frequency 44 Hz
Amplitude cm

15. Description of Resonant Beam
Weight
Vibration Technology
Frequency 44 Hz
Amplitude cm

16. Operational Data of Equipment
Strikes PCC 44 Times per Second.
2,000 lbs. of Pressure Per Strike.
Beam Weighs 4080 kg.
Beam Raises 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.

17. STRUCTURAL DESIGN

18. Structural Design: Methods
AASHTO – Procedure Design (SN)
Asphalt Institute – Series Manuals (MS) -17
NAPA – Series Information (IS) –117
Airfield Asphalt Pavement Technology Program - AAPTP

19. Structural Design: State Studies
Alabama
Over 20 Studies from Multiple States support that rubblizing provides:
Long life for surfaces – 22+ years
Smooth driving conditions
Rubblization eliminates reflective cracking and dramatically reduces surface defects
Michigan

20. Structural Design: Evaluation
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.

21. 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.

22. Structural Design: Drainage
Shoulder Area
Relief Cut @ m.
Permeable Zone
5 cm dense-graded
Rubblized PCC
10 cm open-graded
Filter Fabric
Base Course
# 57 Stone
3 % Slope Outlet
Subgrade

23. Structural Design: Scope
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 > E1
Subbase
Subgrade

24. Coefficient Structure (ai) vs. Modulus (Mr) AASHTO
Structural Design: Coorelations
Coefficient Structure (ai) vs. Modulus (Mr) AASHTO

25. CONSTRUCTION
PROCESS

26. Rubblizing Process Three Stages of Construction: Rubblizing Rolling
Asphalt Overlay

27. Prior to Rubblizing Process
Repair or Replace the Drainage System
Remove any Asphalt Overlay Currently in Place

28. 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

29. Confirm Specification and Debonding
Test Pit
Confirm Specification and Debonding

30. Wright Patterson

31. Rolling
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

32. 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

33. Next Day - Open Traffic

34. 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 centimeters
Maximum Particle Size of 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

35. Results – 22 Year Road