Based on the thermal stress restrained specimen test (“TSRST”) on polyester fiber reinforced asphalt concrete content, this paper analyzes the effect of fiber volume fraction and draw ratio on low temperature cracking resistance of asphalt concrete, and establishes calculation models for TSRST parameters with consideration of fiber content characteristic parameter’s influence. Through analyzing the features of thermal stress-temperature curve for the complete cooling process on the fiber reinforced asphalt concrete, this paper also establishes models for thermal stress calculation with consideration of fiber content characteristic parameter’s influence. the TSRST test result and theoretical analysis show that the fiber content characteristic parameter can comprehensively reflect the effect of fiber volume fraction and draw ratio on the low temperature cracking performance of the asphalt concrete. within the testing range of this paper, the fiber reinforced asphalt concrete demonstrates best performance at fiber volume fraction of 0.35%, draw ratio at 324 and fiber content characteristic parameter at 1.13
road engineering, fiber reinforced asphalt concrete, cracking resistance performance, thermal stress restrained specimen test, fiber content characteristic parameter
The authors gratefully acknowledge the financial support of the project from the Colleges and Universities Key Scientific Research Projects of Henan Province (Grant No. 16B580003)
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