高模量沥青混凝土力学性能试验研究

从高模量沥青混凝土材料组成设计入手，通过沥青混凝土力学性能试验，分析低标号沥青、外掺剂用量对高模量沥青混凝土力学性能的影响规律。试验研究结果显示:低标号沥青可提高沥青混凝土的力学强度；沥青混凝土的回弹模量、劈裂强度和动态抗压模量随外掺剂用量的增加呈增加趋势，当外掺剂用量增加至混合料用量的0.7 %时，沥青混凝土的回弹模量增加幅度平均可达到50 %左右；添加外掺剂的沥青混凝土，其累积变形在一定程度上有所降低。

Experimental Study on Mechanical Properties of High Modulus Asphalt Concrete

Starting from design of composition of high modulus asphalt concrete material, this paper, through the mechanical performance test for asphalt concrete, analyzed the law how low-grade asphalt and additive amount affect the mechanical properties of high modulus asphalt concrete. The result shows that low-grade asphalt may increase mechanical strength of asphalt concrete; the modulus of resilience, cleavage strength and dynamic compressive modulus of asphalt concrete may increase with the increase of additive amount, and when the additive amount reaches 0. 7 % of the mixture amount, the average increment of the modulus of resilience may reach about 50 % ; and for the asphalt concrete with additive, the accumulated deformation will reduce to some extent.