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PAVEMENT REHABILITATION RESONANT RUBBLIZING. What is Rubblizing? The Process of Fracturing Pavement of Portland Cement Concrete into Angular Pieces for.

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Presentation on theme: "PAVEMENT REHABILITATION RESONANT RUBBLIZING. What is Rubblizing? The Process of Fracturing Pavement of Portland Cement Concrete into Angular Pieces for."— Presentation transcript:

1 PAVEMENT REHABILITATION RESONANT RUBBLIZING

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

3

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

5 PSI Number of Years Reflection: Evolution of the Deterioration Quality of the Road

6 PSI Number of Years Quality of the Road Rehabilition of Concrete Pavement

7 Rubblizing Rehabilition of Concrete Pavement

8 Rubblizing Rehabilition of Concrete Pavement

9 Rubblizing Rehabilition of Concrete Pavement

10 Structural Design: Correlations 1 to 8”

11 DESCRIPTION OF TECHNICAL RUBBLIZING

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

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

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

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

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 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 Alabama Michigan

20  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

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 10 cm open-graded 5 cm dense-graded # 57 Stone 3 % Slope Outlet Filter Fabric Shoulder Area Rubblized PCC Base Course Subgrade Permeable Zone Relief 9-12 m.

23 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. E1E1 E 3 > E 2 E 4 > E 3 Where E 3 = f (E 2 ) Where E 2 = f (E 1 ) E 2 > E 1 Subbase Subgrade Structural Design: Scope

24 Coefficient Structure (a i ) vs. Modulus (M r ) AASHTO Structural Design: Coorelations

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 and cm Wide  Ideal Distance Per Run - One Kilometer/ One Lane Wide  Speed of Resonant Machine 6 to 8 km/hr

29 Test Pit Confirm Specification and Debonding

30 Wright Patterson

31  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

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


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