Fatigue Experiments of Simulating Propagating Process of Reflective Cracking in Asphalt Concrete Overlays

Abstract:

In order to simulate reflective cracking of asphalt overlays or semi-rigid asphalt pavements in lab and evaluate the reflective crack resistance performance of with and without interlayer, a finite element analysis model based on the asphalt pavement, of which the semi-rigid base has cracked, is conducted and established through some basic assumptions in this paper. According to the results of pavement mechanical analysis and some literatures review, a laboratory reflective cracking simulation model was designed to compare the resistances of reflective cracking of different mixture samples. In order to compare the reflective cracking of different test samples, a dense grade asphalt mixture AC-20I with and without interlayer were used in the test. The results shows that asphalt mixture beams containing geotechnical fabrics can effectively delay the appearance of the reflective cracking at the bottom of the asphalt mixture beam and evidently reduce the propagation speed of reflective cracking while the beams containing geogrid can also hold back reflective cracking to a certain extent, but not as much as geotechnical fabrics did. It was proved that the model designed through finite element analysis (FEA) can simulate the reflective cracking caused by load and evaluate the reflective cracking resistance performance of different asphalt mixtures well and asphalt mixtures with fabrics can mitigate and delay reflective cracking effectively.

• Periodical: Applied Mechanics and Materials (Volumes 193-194)
• Pages: 1454-1460
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.193-194.1454
• Online since: August 2012
• Authors: Ying Mei Yin
• Keywords: Asphalt Concrete Overlays, Finite Element Analysis (FEA), Lab Simulation Test, Pavement, Reflective Cracking

References

[1] S F Brown, NH Thom and PJ Sanders, A study of grid reinforced asphalt to combat reflection cracking. Association of Asphalt Paving Technologists Annual meeting （2001）

[2] Dai Zhen. Mechanics analysis of asphalt pavement structure: Nanjing: Dissertation of master degree. China: Southeast University（2004）. In Chinese

[3] Chen Chao-gang, Cheng Yue-hui, Sun Dong-gen, et al. Research on use of low cement content stabilized material base to prevent reflection cracking in thin asphalt pavement. Journal of Highway and Transportation Research and Development, Vol. 22（2005）, pp.48-51. In Chinese

[4] Zhou Fujie. Measures and analysis of prevention reflective cracking. Dissertation of doctor degree. Shanghai: Tongji University(1998) , In Chinese

[5] Ni Fujian, Yin Yingmei, Gao Mingsheng. Lab simulation study on reflective cracking resistance of treatment with fiberglass-polyester paving mat. Journal of Southeast University (Natural Science Edition), Vol. 37（2007）, pp.128-131. In Chinese

[6] Su Xinguo, Ni Fujian, Lai Yongman. Experimental research on reflection cracking of asphalt overlay on old concrete pavement. Journal of Highway and Transportation Research and Development . Vol.24(2005), pp.46-49. In Chinese

[7] G. Montestruque, R. Rodrigues, M. Nods, et al. Stop of reflective crack propagation with the use of PET Geogrid as asphalt overlay reinforcement. Paris: Europe Asphalt Pavement Conference. (2004).

[8] Ministry Standard of the PRC: JTG E-20-2011. Standard Test Methods of Asphalt and Asphalt Mixtures for Highway Engineering, Traffic publishing company of the PRC(2011), pp.246-251, In Chinese

[9] Ni Fujian, Yin Yingmei, Gu Xingyu. Study on the fatigue properties of asphalt mixtures with fiberglass/polyester mat reinforcements. TRB 84th Annual Meeting CD-ROM, Washington D.C(2005)

[10] Gallego J., Prieto JN. Development of new laboratory equipment for the study of reflective cracking in asphalt overlays. TRB 85th Annual Meeting CD-ROM, Washington D.C(2006)

[11] Zhang Xiaoning, Zou Guilian, Huo Zhiyong. Investigation of evaluating method to the ability of resisting reflective cracking for asphalt mixture. Journal of South China university of Technology .Vol. 29(2001), pp.88-91. In Chinese