PAVEMENT REHABILITATION

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
(No Transcript)
4
Application of Recycling the Concrete Pavement
(Rubblizing)
Environmentally Friendly Construction
5
Reflection Evolution of the Deterioration
PSI
Quality of the Road
Number of Years
6
Rehabilition of Concrete Pavement
PSI
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
Computer Controls
Weight
Motor
Resonant Beam
Flotation Tires
Pedestal / Shoe
13
Description of Resonant Beam
Weight
Vibration Technology
Frequency 44 Hz Amplitude 1.905 cm
14
Description of Resonant Beam
Weight
Vibration Technology
Frequency 44 Hz Amplitude 1.905 cm
15
Description of Resonant Beam
Weight
Vibration Technology
Frequency 44 Hz Amplitude 1.905 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 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.

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 _at_ 9-12 m.
Permeable Zone
5 cm dense-graded
Rubblized PCC
10 cm open-graded
Filter Fabric
57 Stone
Base Course
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.
24
Coefficient Structure (ai) vs. Modulus (Mr)
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 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
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 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

35
Results 22 Year Road