Asphalt Pavement Deterioration and Failure Mechanisms April 5

Asphalt Pavement Deterioration and Failure Mechanisms April 5, 2018

About Me • West Virginia University • Graduate Research Focus- Asphalt Technology • Aviation Civil Associate- Michael Baker International 2

Laboratory Performance Testing 1 Primary Distresses: Rutting and Fatigue Cracking 2 Performance Tests: APA, Dynamic Modulus, Flow Number, Fatigue 3 Proprietary Blend of Polyolefin and Aramid Fibers 3

Rutting • Consolidation of Mix • Lateral movement of Aggregate 4

Full Depth- Fatigue • Block Cracking • Causes • Environment • Loading 5

Top- Down Fatigue • Longitudinal. Wheel- Path Cracking • Transverse Cracking 6

Top- Down Fatigue 7

Asphalt Pavement Analyzer 8

Asphalt Mixture Performance Tester- AMPT • All- in- One Testing Device • Tests Performed • Dynamic Modulus • Flow Number • Fatigue 9

Forta- Fi® • Polyolefin and Aramid Fibers • 400, 000 psi Tensile Strength • ¾” long monofilament • 50% longer pavement life 10

Our Results- West Virginia University • APA- No significant Difference 11

Dynamic Modulus No Significant Difference 12

Flow Number No Significant DIfference 13

Fatigue 14

Fatigue 15

Arizona State Research

Arizona State University Testing • Flow Number Testing 17

Arizona State University Testing • Fatigue Testing 18

Conclusion • Primary Distresses • Rutting • Fatigue • More work needs to be done 19

QUESTIONS?