Effects of Glass Fiber/Grid Reinforcement on the Crack Growth Rate of an Asphalt Mix
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.
KeywordsStress Intensity Factor Crack Growth Rate Asphalt Mixture Asphalt Concrete Asphalt Layer
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- 1.Monismith, C.L., et al.: Reflection cracking: analyses, laboratory studies, and design considerations. Proceedings of Association of Asphalted Paving Technologies 49 (1980)Google Scholar
- 2.Majidzadeh, K., et al.: Improved methods to eliminate reflection cracking, Report FHWA/RD-86/075. In: Federal Highway Administration, Washington, D.C. (1985)Google Scholar
- 3.Lytton, R.L.: Use of geo-textiles for reinforcement and strain relief in asphalt concrete. Geo-textiles and Remembrances 8(3), 26–45 (1989)Google Scholar
- 4.Ye, G.Z.: Fatigue shear and fracture behavior of rubber bituminous pavement, Reflective Cracking in Pavements. In: Proceeding of the third international RILEM Conference, Netherlands, Maastricht (1996)Google Scholar
- 5.Zhang, D.L.: Asphalt Pavements. China Communication Press, Beijing (1998)Google Scholar
- 6.Asphalt Pavements Constructions and Tests Norm (GBJ92-93). China Communication Press, Beijing (2001)Google Scholar
- 7.Najd, A.: Evaluation of Asphalt Overlays Anti-cracking Systems over Existing Cracked Asphalt Pavements. A Dissertation of Chang’an university (2005)Google Scholar
- 8.Braham, A.F., et al.: The effect of long-term laboratory aging on asphalt concrete fracture energy. Journal of the Association of Asphalt Paving Technologists 78, 416–454 (2009)Google Scholar
- 9.Baek, J., Al-Qadi, I.L.: Reflective cracking: modeling fracture behavior of hot-mix asphalt overlays with interlayer systems. Journal of the Association of Asphalt Paving Technologists 78, 789–828 (2009)Google Scholar