基于复合材料的橡胶颗粒沥青混合料弹性模量预测  

Elastic modulus prediction of crumb rubber asphalt mixture based on composite material

作　　者：陈渊召[1] 李振霞[1] 

机构地区：[1]华北水利水电大学土木与交通学院,河南郑州450045

出　　处：《中南大学学报（自然科学版）》2013年第6期2609-2616,共8页Journal of Central South University:Science and Technology

基　　金：国家西部交通建设科技项目(200531881213);河南省教育厅科学技术研究重点项目(13A580707;13B580109);华北水利水电学院高层次人才科研启动费资助项目(201210)

摘　　要：为对橡胶颗粒沥青混合料弹性模量进行预估,分别建立单夹杂复合材料两层嵌入式模型和多步骤多相细观力学模型,得到橡胶颗粒沥青混合料弹性模量预测方法,对橡胶颗粒沥青混合料弹性模量进行预测;将弹性模量预测结果与实测结果进行对比分析,研究橡胶颗粒沥青混合料弹性模量影响因素,并对低温条件下弹性衰减进行分析。研究结果表明:该细观力学模型方法是有效的和可靠的,可用于预先评估橡胶颗粒沥青路面在低温下的力学性能和除冰能力;沥青胶浆的弹性模量对橡胶颗粒沥青混合料弹性模量的影响较大,且随沥青胶浆弹性模量的增大而增大;橡胶颗粒用量变化对混合料弹性模量的影响比较大,随着橡胶颗粒用量的增加,混合料弹性模量逐渐减小;在低温下,混合料的弹性模量显著增大,橡胶颗粒沥青路面的除冰效果将大大减弱。In order to predict elastic modulus of crumb rubber asphalt mixture, two-layer embedded model of single inclusion composite and multi-step multiphase micro-mechanical model were established. Prediction method of elastic modulus for crumb rubber asphalt mixture was gotten. Elastic modulus of crumb rubber asphalt mixture was predicted, and elastic modulus comparative analysis of prediction results and measured results was carried out. Influencing factors of elastic modulus for crumb rubber asphalt mixture were researched, and deep analysis on elasticity attenuation under low temperature was carried out. The results show that the micro-mechanical model method is effective and reliable, and can be used to predict mechanical properties and deicing ability of crumb rubber asphalt mixture under low temperature. The effect of elastic modulus for asphalt mortar on elastic modulus for asphalt mixture is big, and elastic modulus of crumb rubber asphalt mixture increases with the increase of the asphalt mortar. The effect of crumb rubber amount on elastic modulus for crumb rubber asphalt mixture is big, and elastic modulus of asphalt mixture decreases gradually with the increase of the crumb rubber amount. Under low temperature elastic modulus of crumb rubber asphalt mixture increases significantly. Deicing effect of crumb rubber asphalt pavement reduces considerably.

关 键 词：道路工程 预测方法 橡胶颗粒沥青混合料 复合材料 弹性模量 细观力学模型 

分 类 号：U416.26[交通运输工程—道路与铁道工程]