高原寒冷地区沥青混合料冻融循环作用下抗压性能分析

doi:10.3969/j.ISSN.1002-0268.2013.04.002

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Abstract Low average temperature, large temperature difference, and continual freeze-thaw (F-T) cycles are the typical climatic characteristics of cold plateau regions. F-T cycles and the asphalt-aggregate ratio of an asphalt mixture have been analyzed using a uniaxial compressive test under F-T cycles. The results show that the compressive strength and resilient modulus decrease with an increase in the number of F-T cycles. The mixture performance declines sharply in the initial F-T cycles and gradually gentle after 8-10 F-T cycles. Further, the asphalt-aggregate ratio has a significant influence on the compressive characteristics of the mixture under F-T cycles: a lower asphalt-aggregate ratio leads to a better compressive performance than a higher asphalt-aggregate ratio. A higher asphalt-aggregate ratio leads to a small loss ratio of compressive performance under F-T cycles. The results also reveal that F-T cycles obvious impact on the compressive properties of the mixture and that the use of asphalt concrete (AC)-13 with an optimum asphalt content (5.5%) or more can improve the low-temperature compressive performance of the mixture under F-T cycles.

Key words： road engineering uniaxial compression test freeze-thaw cycles compressive performance asphalt mixture

Received: 10 March 2013

Fund:Supported by the Road and Transport R&D Project for Western Regions of China Commissioned by Ministry of Transport (N0.2009318000027, No.201231879210)

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	SI Wei
	MA Biao
	WANG Hai-nian
	LI Ning
	HU Jian

Cite this article:

SI Wei,MA Biao,WANG Hai-nian, et al. Analysis of Compressive Characteristics of Asphalt Mixture under Freeze-Thaw Cycles in Cold Plateau Regions[J]. Journal of Highway and Transportation Research and Development, 2013, 7(4): 17-22.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/10.3969/j.ISSN.1002-0268.2013.04.002 OR http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/Y2013/V7/I4/17

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