Studies Of Epoxy Asphalt's Performances And Optimization Of Design

Nowadays, the forepart disease of steel bridge's pavement is an international puzzle. The main reason of the forepart disease is that the general asphalt concrete can not satisfy the strict requirements of steel deck's pavement. The requirements are that can resist large deformation, good abilities to follow the deformation, high flexural strength, fatigue life, high strength of bond layer.Epoxy asphalt concrete pavement is the main method to solve problems of steel deck pavement domestic and abroad. Nowadays, many scholars make researches on epoxy asphalt. There are several kinds of epoxy asphalt that used widely in China:the American epoxy asphalt, Japan epoxy asphalt and homemade epoxy asphalt. However, there are many problems in the application process of epoxy asphalt that the construction process is very complicated, conditions of construction is very harsh, and it's very expensive too. The construction American epoxy asphalt concrete requires there are no any moisture and dust within concrete. The allowed error of construction time is below 5 minutes. The price common modified asphalt that used for SMA is 5000-6000 yuan/T, Chinese epoxy asphalt is around 40,000 yuan/T, the price of American epoxy asphalt is between 60,000 and 70,000 yuan/T, the Japanese epoxy asphalt is about 80,000 yuan/T.In this paper, author make research on the design of Japanese epoxy asphalt to optimize the design in the principle of satisfying the requirements of steel bridge deck pavement, in order to reach the objective of reducing total project cost..The main research method is through the asphalt test, asphalt concrete performance test to evaluate the pavement performance after optimization, then construct the corresponding mathematical model.In this paper, four key issues are:performance evaluation of epoxy asphalt, analysis of epoxy asphalt's microstructure, optimum design of epoxy adding proportion, improvement of epoxy asphalt concrete's constructed technology. In performance prediction and evaluation of epoxy asphalt, author gets the mathematical model about the relation of the asphalt performance and epoxy adding proportion, explanation and analysis the model by project example, laboratory experiments. Using SEM, fluorescence microscopy on the microstructure of epoxy asphalt analysis, author explains differences in their performance from microscopic. In the end, author uses the model to optimize the design of epoxy asphalt concrete. In the construction technology, to refer to viscosity test, the author advanced that the appropriate epoxy asphalt mixture discharge temperature and the allowed temperature.