Research And Application Of Mixed Asphalt Mixture Technology

At present, most of the road pavement structure layer in China is hot mix asphalt concrete(HMA). Asphalt mixture has the best use performance. But along with the social progress, the social and the enterprise to the asphalt surface layer construction in the environment protection, the construction health environment and the construction cost to have the higher request, the hot mix asphalt mixture’s many shortcoming also gradually exposes:Keywords:At high temperature, the mixture of asphalt mixture can accelerate the aging of asphalt, which seriously affect the durability of hot mix asphalt mixture; Construction is influenced by the external environment factors, hot mix asphalt mixture on the construction of the outside world natural temperature requirements,If the ambient temperature is not less than 10; Hot mix asphalt mixture on the health of human body is a large, mixed and spread the black “smoke” is a very common phenomenon, "Smoke" in addition to the air pollution, the operator’s respiratory system also has a strong role in stimulating. In view of the shortage of hot mix asphalt mixture, warm mix asphalt mixture(WMA) with the social environmental protection consciousness and the continuous progress of the technology of asphalt mixture. Warm mix asphalt mixture in addition to ordinary warm mix of the many advantages, warm mix asphalt is conducive to reduce the aging of asphalt, improve the operating environment. The mixing temperature of warm mix asphalt mixture is reduced from 20 to 30, and the heating temperature of rough set is reduced greatly, the production cost of the mixture can be reduced by 3 yuan /t. With the continuous improvement of technology, the performance of warm mix asphalt is more stable.WMA(Warm Mix Asphalt), viscosity-reducer, the performance of WMA. Warm mix asphalt technology can greatly reduce the cost of asphalt concrete mixing, but also effectively reduce asphalt aging, is of positive significance for construction work environment and environmental protection. In this trend, the hot mix asphalt mixture technology needs more positive innovation. The successful application of many projects in city of Weifang has good effect through the latter.The research direction by adding lower melting viscosity decrease the viscosity of asphalt warm mix asphalt of preparation technology and the practical effect in engineering application. Research shows that: the adding amount of reducing agent such as Sasobit(SA) or SLA, in order to achieve the aim of reducing the high temperature viscosity of asphalt. The decrease of asphalt temperature will greatly reduce the amount of pollutants discharged, in order to realize the social requirements of energy saving and environmental protection. Added a certain amount of reducing agent Sasobit or SLA in order to improve the high temperature stability of warm mix asphalt concrete, asphalt concrete in the mixing process of asphalt aging problem. On the road of the anti rutting performance can be improved. And through the experiment showed that a dose reduction agent incorporation, of warm mix asphalt mixed material did not affect other properties, such as the effect of asphalt in low temperature and permeability is limited.