纤维掺量对沥青混凝土抗压回弹模量的影响分析

为了研究纤维掺量对沥青混凝土的抗压强度和回弹模量的影响,选用5种聚酯纤维掺量沥青混凝土的圆柱体试件在M TS810材料试验机上进行单轴静压试验,试验温度为20℃。分析了沥青混凝土的抗压强度和回弹模量随纤维掺量变化的规律以及纤维的作用机理,同时对回弹模量取值的合理性进行了探讨。结果表明,沥青混凝土的力学性能对纤维的掺量反映敏感,适量地加入纤维会改善沥青混凝土的抗压强度和回弹模量。根据试验分析结果确定纤维的合理掺量范围为0.2%~0.25%,纤维掺量为0.3%的回弹模量合理取值有待深入研究。

Influence of Fiber Contents on Compressive Resilient Modulus of Asphalt Concrete

Uniaxial static compress test is conducted to study compressive resilient modulus and compressive strength of asphalt concrete with different fiber contents. The cylinder samples, with five kinds of polyester fiber contents, are tested on MTSS10 under 20C. The test mechanism of fiber reinforced asphalt concrete and the relation between the fiber content and two parameters of compressive strength and static modulus are analyzed as well as rational value of resilient modulus is discussed. The results show that the mechanics performance is sensitive to fiber contents; both compressive strength and resilientmodulus receive the maximum value as fiber contents increase. The rational polyester fiber content that lies in 0.2%-0.25% is given according to test results, the resilient modulus values of mixtures including 0.3% still need to be researched thoroughly.