Abstract:

Three kinds of asphalt immersion methods (aggregate immersion method, aggregate mixture immersion method, and asphalt mixture immersion method) and calculation methods were used to test the maximum theoretical relative density of the asphalt mixture. Mix ratio design was carried out to determine the optimal asphalt content and all the pavement performances of asphalt mixtures were compared and analyzed. The general water stability property tests and HWTD were used to test the water stability of three kinds of andesite asphalt mixtures which added with no antistripping agent, liquid antistripping agent and hydrated lime. The results showed  that the pavement performance of asphalt mixtures, which were  manufactured by using the asphalt immersion method to determine the maximum theoretical relative density of asphalt mixture and carry out the mix design, is better than that of the asphalt mixture manufactured by using the calculation method; and HWTD could effectively evaluate the water stability property of asphalt mixtures . Adding hydrated lime is the optimum measure to improve the water stability property of andesite asphalt pavement.

Key words:  asphalt pavement, porous andesite, maximum theoretical relative density, asphalt immersion test, hamburg wheel tracking test, water stability property