The Sdudy Of Asphalt Pavement's Low-Temperature Contraction Cracking Control Criterions And Predicting Models

At present, a main reason of asphalt pavement's demolish is the low-temperature cracking of which. To the problem, the design of resisting asphalt pavement's cracking and performance criterions of asphalt materials are always important study objects of international academia, which puts forward many criterions to estimate low-temperature performance of asphalt pavement. But it needs to ulteriorly study on how contacting performance criterions of asphalt materials with road performance. In the paper, I would establish the relationship between low-temperature performance criterions and road performance of asphalt and asphalt mixture by the predicting model's study of the low-temperature cracking of asphalt pavement. And the low-temperature estimate criterions will be confirmed which can control cracks of asphalt pavement.Firstly, this papaer will study low-temperature performance of asphalt and asphalt mixture. Departed research shows that critical cracking temperature adopted by AASHTO MP1 criterion can primely estimate asphalt's low-temperature. By low-temperature test to asphalt and correlation analysis, deducting the relationship between other criterions and critical cracking temperature of asphalt, in view of low-temperature estimate criterions and performance of asphalt pavement, I will give the propositional low-temperature estimate criterions of base asphalt.In this paper, low-temperature performance of asphalt mixture will be generally-purpose studied, proving that the applicability of SHELL abac which predicts low-temperature stiffness of asphalt mixture, low-temperature stiffness can primely estimate low-temperature performance of asphalt mixture, and also primely relate to low-temperature predicting model of asphalt pavement.Secondly, I will study the low-temperature cracking predicting model of asphalt pavement. In order to primely relate to the low-temperature estimate criterions of asphalt pavement, I choose Haas model as study object based on synthetically...