吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (04): 885-890.doi: 10.7964/jdxbgxb201304007

• paper • Previous Articles     Next Articles

Flexural tensile characteristics of asphalt mixture under freeze-thaw cycles

SI Wei1, MA Biao1, WANG Hai-nian1, HU Jian2   

  1. 1. Key Laboratory of Special Area Highway Engineering of Ministry of Education, Highway School, Chang'an University, Xi'an 710064, China;
    2. Technology and Science Center, The Second Highway Engineering of China Communications Construction Company Ltd., Xi'an 710065, China
  • Received:2012-04-26 Online:2013-07-01 Published:2013-07-01

Abstract:

By bending test of asphalt mixture under freeze-thaw conditions,the influences of freeze-thaw cycles,asphalt-aggregate ratio and gradation composition on the flexural characteristics of asphalt mixture were investigated.Experiment results show that,the flexural tensile strength, the flexural-tensile strain and the stiffness modulus of asphalt mixture decrease with the increase in the number of freeze-thaw cycles. Obvious influences of the asphalt-aggregate ratio and gradation composition on the flexural characteristics were observed.As the asphalt- aggregate ratio increases, the influence of freeze-thaw cycles on the flexural characteristics decreases.The flexural characteristics of AC-13 mixture are better than that of other two gradations.It is shown that applying AC-13 mixture with 5.5% OAC or higher can improve low temperature flexural characteristics of the asphalt mixture under freeze-thaw cycle condition.

Key words: road engineering, flexural characteristics, freeze thaw cycle test, asphalt mixture, cold plateau region

CLC Number: 

  • U414

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