PAVEMENT REHABILITATION RESONANT 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
Reflection: Evolution of the Deterioration PSI 5 1 4 3 2 Quality of the Road Number of Years
Rehabilition of Concrete Pavement PSI 5 1 4 3 2 Quality of the Road Number of Years
Rehabilition of Concrete Pavement Rubblizing
Rehabilition of Concrete Pavement Rubblizing
Rehabilition of Concrete Pavement Rubblizing
Structural Design: Correlations 1 to 8”
DESCRIPTION OF TECHNICAL RUBBLIZING
Description of Rubblizing Equipment Weight Computer Controls Motor Resonant Beam Flotation Tires Pedestal / Shoe
Description of Resonant Beam Weight Vibration Technology Frequency 44 Hz Amplitude 1.905 cm
Description of Resonant Beam Weight Vibration Technology Frequency 44 Hz Amplitude 1.905 cm
Description of Resonant Beam Weight Vibration Technology Frequency 44 Hz Amplitude 1.905 cm
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 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
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.
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 Shoulder Area Relief Cut @ 9-12 m. Permeable Zone 5 cm dense-graded Rubblized PCC 10 cm open-graded Filter Fabric Base Course # 57 Stone 3 % Slope Outlet Subgrade
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
Coefficient Structure (ai) vs. Modulus (Mr) AASHTO Structural Design: Coorelations Coefficient Structure (ai) vs. Modulus (Mr) AASHTO
CONSTRUCTION PROCESS
Rubblizing Process Three 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
Confirm Specification and Debonding Test Pit Confirm Specification and Debonding
Wright Patterson
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
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