陶瓷纤维掺量对沥青混合料力学性能的影响研究

Study on the influence of ceramic fiber content on the mechanical properties of asphalt mixture

为研究陶瓷纤维(CF)的掺量对沥青混合料力学性能的影响,选用碎硅石骨料制备陶瓷纤维改性沥青混合料(CFMAM)试件,通过马歇尔试验、间接拉伸劲度模量试验(ITSM)、间接拉伸疲劳试验(ITFT)和重复荷载轴向试验(RLA)方法,分别针对CF掺量为1%,3%,5%沥青混合料的力学性能展开对比分析。结果表明:不同CF掺量沥青混合料的劲度模量、抗疲劳性能、抗永久变形性能均优于普通沥青混合料;在3%的最佳纤维掺量下,沥青混合料的抗疲劳性能和抗永久变形性能得到了显著提高。

In order to study the influence of Ceramic Fiber(CF)content on the mechanical properties of asphalt mixture,preparation of Ceramic Fiber Modified Asphalt Mixture(CFMAM)specimens with crushed silica aggregate,through Marshall test,Indirect Tensile Stiffness Modulus test(ITSM),Indirect Tensile Fatigue Test(ITFT)and Repeated Load Axial test(RLA)method,comparative analysis on mechanical properties of asphalt mixture with CF content of 1%,3%and 5%.The result shows:The stiffness modulus,fatigue resistance and permanent deformation resistance of asphalt mixture with different CF content are better than those of ordinary asphalt mixture.Under the optimal fiber content of 3%,the fatigue resistance and permanent deformation resistance of asphalt mixture have been significantly improved.