Virtual Experimental Study of Resistance to Temperature Shrinkage of Cement Stabilized Crushed Stone Based on Mesoscopic Model
The problem of temperature shrinkage cracking of cement stabilized crushed stone has not been fully solved for a long time.There are many influencing factors,and it is difficult to decide specific improvement measures in engineering prac-tice.The development of mesoscopic analysis provides a new support for virtual experiments.Taking anti-cracking cement sta-bilized crushed stone and common cement stabilized crushed stone as objects,a cylinder specimen model based on cohesive force unit was established to simulate a single cooling condition,and the resistance to temperature shrinkage of specimens with different levels of parameters and mechanical parameters were compared.The results show that the zero-thickness cohe-sive unit model is reasonable,the more the five different gradations tend to be continuous grading,the greater the bond strength between aggregate and mortar interface and mortar internal interface,and the worse the resistance to tempera-ture shrinkage of cement stabilized crushed stone.In order to improve the resistance to temperature shrinkage,gap grad-ing should be preferred,and appropriate measures can be taken to reduce the bond strength between aggregate and mortar.
cement stabilized crushed stoneresistance to temperature shrinkagemesoscopic modelvirtual experiment
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