Fatigue property of basalt fiber-modified asphalt mixture under complicated environment
Yuanxun Zheng , Yingchun Cai , Guanghai Zhang , Hongyuan Fang
Journal of Wuhan University of Technology Materials Science Edition ›› 2014, Vol. 29 ›› Issue (5) : 996 -1004.
Fatigue property of basalt fiber-modified asphalt mixture under complicated environment
The fatigue property of asphalt mixtures under complicated environment (low-temperature bending performance, chloride penetration, freezing-thawing cycle and their coupling effect) and the improvement effect for relevant property of basalt fiber-reinforcing asphalt mixture under complicated environment are studied. Two grading types of asphalt mixtures, AC-16I and AC-13I, are chosen, whose optimum asphalt-aggregate ratio and optimum dosage of basalt fiber are determined by the Marshall test. The standard specimens are made firstly, and then the low temperature bending tests of asphalt mixture and basalt fiber-reinforced asphalt mixture under the coupling effect of the chloride erosion and freezing-thawing cycle have been carried out. Finally, the fatigue property tests of asphalt mixture and basalt fiber-reinforced asphalt mixture under complex environment are performed on MTS material testing system. The results indicate that the tensile strength, the maximum curving tensile stress, the curving stiffness modulus, and fatigue properties of asphalt mixture are influenced by the coupling effect of the chloride erosion and freezing-thawing cycle. The low-temperature bending performance and fatigue property of asphalt mixtures under complicated environment can be greatly improved by adding moderate basalt fiber. The dense gradation asphalt mixture possesses stronger ability to resist adverse environmental effects under the same condition.
asphalt mixture / basalt fiber / the chloride erosion / freezing-thawing cycle / the coupling effect / low-temperature performance / fatigue property
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