Study on Fatigue Life of Cement Stabilized Macadam Base during Crack Expanding Phase Based on Accelerated Loading Test

Abstract:

The evaluation for remaining life of semi-rigid base layer has a significant effect on pavement maintenance scheduling like resurface or rehabilitation. An accurate evaluation can obviously improve the pavement maintenance, which could also utilize the original pavement structure in a rationally way, and optimize the entire maintenance plan. In this study, a series of laboratory investigation were conducted on the cement stabilized macadam materials. The fatigue life and deterioration characteristics of cement stabilized macadam materials were analyzed during the pre-cracked (fatigue cracks occurring) phase and crack expanding phase by laboratory fatigue test and full-scale accelerated loading test, respectively. Then, a fatigue life correction coefficient of the crack expanding phase was used to analyze the fatigue properties of the semi-rigid base, and a modulus degradation model of the semi-rigid base life was characterized. It proved to be convenient to evaluate the residual life of semi-rigid base according to the modulus.

• Periodical: Key Engineering Materials (Volume 846)
• Pages: 213-219
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.846.213
• Online since: June 2020
• Authors: Wei Zeng, Rong Ma*, Fei Chen, Ke Zhong, Xiao Chen Ma
• Keywords: Accelerated Loading, Crack Expanding, CTB, Fatigue Life, Life Correction Coefficient

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