心墙沥青混凝土动力特性影响因素的试验研究

Experimental study on factors of dynamic properties of core wall asphalt concrete

通过沥青混凝土的动三轴试验研究,分析了围压、固结比和油石比等因素对心墙沥青混凝土动力特性的影响规律。试验结果表明:围压或固结比增大有利于沥青混凝土抵抗动荷载能力的提高,但沥青混凝土的阻尼比降低;油石比对沥青混凝土的动力特性有很大的影响,在本次试验研究范围内的沥青混凝土配合比中,油石比的增大对沥青混凝土抵抗动荷载的能力有所提高。

Based on the dynamic triaxial experiment of a core wall asphalt concrete, this paper studies the influences on its dynamic characteristics by factors of confining pressure, consolidation ratio, bitumen aggregate ratio, etc. The results show that an increase in confining pressure or consolidation ratio is conducive to its capabilities of resisting dynamic loads, but such an increase leads to a reduction in its damping ratio. The bitumen aggregate ratio has a great influence on the dynamic properties. In the test range of asphalt concrete mixing proportion in this study, an increase in bitumen aggregate ratio considerably improves the resistance of asphalt concrete against dynamic loads.