沥青混合料与CA砂浆的阻尼特性研究

Research on Damping Performance of Asphalt Mixture and CA Mortar

当前,沥青混合料为道路路面主要材料,CA砂浆(水泥沥青砂浆:Cement Asphalt Mortar,简称CA砂浆)垫层主要应用在高速铁路轨下基础。论文立足二者阻尼性能的特点,探讨沥青混合料和CA砂浆在不同影响环境(频率)下的阻尼规律、阻尼差异性,并进行对比。结果表明,CA砂浆与沥青混合料在低频段阻尼具有相同的变化趋势;在某一频率为界限的低频段,CA砂浆显现出较沥青混合料更好的阻尼特性,而高频段,沥青混合料表现出较CA砂浆更好的阻尼性能。

At present,the asphalt mixture is the main material for road pavement while CA mortar is applied for the cushion layer under the high speed rail foundation.Based on the different damping characteristics,this paper discussed and compared the rule and differences of the damping between the asphalt mixture and CA mortar in different environment(frequency).The results showed that the asphalt mixture and CA mortar would have the same trend in the low frequency;and there would be a particular frequency,before this critical frequency the CA mortar appeared the better damping performance while after that the asphalt mixture showed the better damping performance.