Effects of Glass Fiber/Grid Reinforcement on the Crack Growth Rate of an Asphalt Mix

  • C. C. Zheng
  • A. Najd
Part of the RILEM Bookseries book series (RILEM, volume 4)

Abstract

This paper presents an application of fracture mechanics to determine crack growth rates of the suggested anti-cracking overlay systems. Two different reinforcing methodologies are applied; 1: addition of chopped glass fibers to the HMA; 2: reinforcing asphalt overlay by glass grids. Asphalt mixture designing tests, three points bending tests and fatigue crack propagation tests were carried out. Fracture toughnessK IC is determined for plain and reinforced asphalt concretes. The crack growth rate is determined for each type of anti-cracking systems, the cracking process is analyzed. One of the significant points in this study is the attempt to give better understanding of the crack propagation for multilayer asphalt overlay. The results indicate that the reinforcing materials improve anti-cracking characteristics of the asphalt concrete and composite structure anti cracking overlay gives a good solution for reflective cracking phenomenon over old cracked pavements.

Keywords

Stress Intensity Factor Crack Growth Rate Asphalt Mixture Asphalt Concrete Asphalt Layer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© RILEM 2012 2012

Authors and Affiliations

  • C. C. Zheng
    • 1
  • A. Najd
    • 1
  1. 1.College of HighwayChang’an UniversityXi’anP.R. China

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