12Description of Rubblizing Equipment WeightComputer ControlsMotorResonant BeamFlotation TiresPedestal / Shoe
13Description of Resonant Beam WeightVibration TechnologyFrequency 44 HzAmplitude cm
14Description of Resonant Beam WeightVibration TechnologyFrequency 44 HzAmplitude cm
15Description of Resonant Beam WeightVibration TechnologyFrequency 44 HzAmplitude cm
16Operational 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.
18Structural Design: Methods AASHTO – Procedure Design (SN)Asphalt Institute – Series Manuals (MS) -17NAPA – Series Information (IS) –117Airfield Asphalt Pavement Technology Program - AAPTP
19Structural Design: State Studies AlabamaOver 20 Studies from Multiple States support that rubblizing provides:Long life for surfaces – 22+ yearsSmooth driving conditionsRubblization eliminates reflective cracking and dramatically reduces surface defectsMichigan
20Structural 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.
21Structural 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.
23Structural 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.E1E3 > E2E4 > E3Where E3 = f(E2)Where E2 = f(E1)E2 > E1SubbaseSubgrade
24Coefficient Structure (ai) vs. Modulus (Mr) AASHTO Structural Design: CoorelationsCoefficient Structure (ai) vs. Modulus (Mr) AASHTO
34Recommended State Specification High Frequency Low Amplitude Resonant BreakerResonant Breaker shall apply 2,000 lbs of pressure per strike at 44 hertzRemoval of any Existing Asphalt OverlayMajority of the Particle Size Less than centimetersMaximum Particle Size of centimeters10 Ton High Frequency - Low Amplitude Vibratory Roller3 Passes with Maximum Speed of 1.82 meters/secondMinimum of 80% Debonding of Existing Steel ReinforcementNo Traffic on Rubblized Slab Until First Lift is PlacedMinimum of 12.7 cm of Hot Mix Asphalt Overlay