Research On Aging Properties Of Used Rubber Modified Asphalt

Literatures on the topic of used rubber modified road asphalt were overviewed. By using the used rubber powder,the problem of temperature sensitivity if road asphalt could be resolved. A large number of experiments were conducted on the topic of rubber modified asphalt and the aging properties. The results show that adding finery ground rubber powder into asphalt is an effective way to improve its properties at low temperature and aging properties, and the used tyres could be used. The admixing technology aging mechanism and the influence of rubber powder on the performance of asphalt were studied.On the basis of the past achievement all over the world, the effect of aging on softening temperature,penetration and ductility. The relationship between the dosage of rubber powder and aging properties, the size of rubber powder and aging properties were studied. The feasible method to improve the aging properties of asphalt was found. The optimal dosage and size of rubber powder were determined. The rule of influence of dosage and size of rubber powder on the ductility at low temperature was obtained. And reached the following specific conclusions: rubber content with the increase of resistance to ageing rubber modified asphalt increased ageing after less than for low-temperature service, the quality of reduced losses, soften point increase needle into a normal degree. Summed up the aging asphalt and modified asphalt laws made spent rubber for asphalt modified agents, the principles of the size options and dosage of rubber powder for spent rubber modified asphalt road asphalt in the application provided a good technical support.