The Manufacture And Application Research On Slow-Setting Asphalt Emulsion

Asphalt emulsion is a kind of pavement material of good performance. It has the advantages of convenient construction, simple technics, saving resource and low pollution. So it is used widely in recent years.In this paper, through the analysis of asphalt emulsification mechanism, a new kind of asphalt emulsion which is applicable for cold mix is made out after a great deal of experiments. The qualities of the asphalt emulsion and modified asphalt emulsion are checked, and they satisfy the requirements of BC-2 cationic asphalt emulsion and could be used in cold mix.Through the research on cold mix, the mix design method is put forward .Firstly, the initial content of asphalt emulsion is determined by estimating the film thickness. Secondly, the optimum asphalt emulsion content is determined after modified Marshall Test. Finally, Waterlogged Marshall Test and Scattering Loss Test are used to validate the optimum asphalt emulsion content.Aiming at the fact that cold mix forms strength slowly and its'earlier period strength is low, cement is added. After a great deal of experiments, it demonstrates the beneficial effects of adding cement to cold mix.It also analyzes the economic and social results of the cold mix. And it is showed that cold mix is a good material to low class road which is far from the hot mix plant.