纤维沥青低温性能的试验研究

Experimental Study on Low Temperature Performances of Fiber Asphalt

沥青具有抗拉强度低、温度敏感性差等本质缺陷,而纤维具有高抗拉强度、高模量等优点。在沥青混合料中掺入高抗拉强度的聚合物纤维成为提高沥青混合料使用性能的一种重要手段。鉴于纤维在沥青混合料中所起的作用很大程度通过沥青传递,为进一步评价纤维所起的作用,通过采用测力延度试验来评价纤维长度及掺量对纤维沥青低温性能影响,从而为纤维沥青混合料中纤维的选择提供依据和参考。

The asphalt has the inherent limitations of low tensile strength and high temperature sensitivity,while the fiber has the properties of high tensile strength and elastic modulus. Therefore,it is an important means to enhance the use performance of the asphalt mixture by admixing the high tensile strength of the polymer fiber into the asphalt mixture. In view of the effect of the fiber in the asphalt mixture to be transferred greatly by the asphalt,and in order to evaluate the effect of fiber,this paper evaluates the influence of the fiber length and admixing dosage on the low temperature performances of fiber asphalt by the force-ductility test so as to provide the basis and the reference for the selection of fiber in the fiber asphalt mixture.