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

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.