【摘要】 低温度段的线收缩系数α是计算水工沥青混凝土低温应力非常重要的参数。沥青含量、沥青品种及环境温度对α值的影响差异很大。文中运用灰关联熵分析法,对沥青混凝土线收缩系数进行试验研究,主要研究沥青品种中密度、15度延度、5度延度、针入度对α值的影响,得出沥青针入度灰熵关联度最大,是最优相关因素。研究成果对水工沥青混凝土防渗性能提高具有实际意义。更多还原

【Abstract】 Low temperature line contraction coefficient α of hydraulic asphalt concrete section is very important for the asphalt concrete structure of hydraulic construction,it has influence on asphalt concrete impervious facing’s temperature stress. It is also important for low temperature stress parameters calculation of asphalt concrete impervious facing. In different types of asphalt,the asphalt content and temperature conditions,the α values are different. The author analyses the asphalt concrete line contraction coefficient with grey relation entropy method,the research content mainly includes effect of variety density,15 degrees of ductility,5 degrees of ductility and penetration on the alpha value. It is concluded that asphalt penetration is the largest grey correlation entropy and the optimal relative factor. The result of research has practice significance for the impervious performance in practice.更多还原