Accelerated Pavement Testing and Research Program Florida - - PowerPoint PPT Presentation

▶

Jun 15, 2023 121 likes •325 views

Accelerated Pavement Testing and Research Program Florida Department of Transportation State Materials Office 5007 Northeast 39 th Avenue Gainesville, FL 32609 (352) 337-3100 What is Accelerated Pavement Testing? Investigation and

SLIDE 1

Accelerated Pavement Testing and Research Program

Florida Department of Transportation State Materials Office 5007 Northeast 39th Avenue Gainesville, FL 32609 (352) 337-3100

SLIDE 2

What is Accelerated Pavement Testing?

Investigation and evaluation of pavement systems

subjected to accelerated loading.

Accelerated loading must be applied in a realistic

manner.

We now have the capability to simulate years of traffic

loading in a matter of weeks.

SLIDE 3

APT Advantages

Time Control of

Variables

Economy Flexibility

SLIDE 4

Objectives of the APT Program

Focus on the Florida’s most critical issues Determine solutions Facilitate implementation

Objectives Include:

Validation of existing methods / materials Validation of innovative methods / materials Long-range research Trouble-shooting type problem solving

SLIDE 5

APT Assets

Tools available to conduct accelerated pavement testing:

Dedicated test track Dedicated test pits Full laboratory capabilities Heavy Vehicle Simulator

SLIDE 6

Test Track Facility

SLIDE 7

Test Pit Facility

SLIDE 8

Test Pit

SLIDE 9

Heavy Vehicle Simulator

Weight:

50+ tons

Length:

75 feet

Height:

13 feet

Width:

12 feet

SLIDE 10

Testing and Loading Capabilities

Wheel loading from 7

to 45 kips

Maximum wheel

speed: 8 mph

Sinusoidal loading Maximum passes/day: 29,000 for bi-

directional testing

14,000 for uni-

directional testing

SLIDE 11

Testing and Loading Capabilities

Test Track Length: 20’ Wander From 0 – 30” Super-Single vs. Dual Maximum Rut Depth: 4”

SLIDE 12

Rut Examples

Bi-Directional, No Wander Uni-Directional, No Wander

SLIDE 13

Uni-Directional Testing

SLIDE 14

Bi-Directional Testing

SLIDE 15

Laser Profiling

SLIDE 16

Temperature Control

SLIDE 17

Performance-to-Date

Put into service 10/25/00 Over 5 million loaded passes to date. Average daily “down” time for scheduled

preventative maintenance is roughly 1 hour.

Very pleased with the reliability.

SLIDE 18

Performance Comparison

Rut comparison

study

Identical Super-

pave mix - except for the binder

PG 67-22 vs.

PG 76-22

SLIDE 19

Initial Rut Comparison 67-22 (Unmodified) vs. 76-22 (Modified) Binders 2 4 6 8 10 12 14 16 50000 100000 150000 200000 Number of Passes (9000 pound load) Rut Depth (mm) 76-22 Binder (Modified) 67-22 Binder (Unmodified)

Initial Results

SLIDE 20

Contact Information

Bouzid Choubane, Ph.D., P.E. State Pavement Evaluation Engineer Telephone: 352-955-6302 Fax: 352-955-6345 E-Mail: bouzid.choubane@dot.state.fl.us Tom Byron, P.E. Pavement Research Engineer Telephone: 352-955-6314 Fax: 352-955-6345 E-Mail: tom.byron@dot.state.fl.us