A kind of high modulus asphalt and preparation method thereof

Abstract

The invention belongs to the technical field of preparation of modified asphalt and in particular relates to high-modulus asphalt and a preparation method thereof. The high-modulus asphalt is composed of asphalt, a polystyrene-polybutadiene segmented copolymer thermoplastic elastomer and an auxiliary agent, wherein the asphalt comprises high label asphalt and low label asphalt, the internal mixing amount of the low label asphalt in the high label asphalt is 10-80wt%, the internal mixing amount of the polystyrene-polybutadiene segmented copolymer thermoplastic elastomer in the asphalt is 2-7wt%, and the external mixing amount of the auxiliary agent is 0.51-15wt%. Compared with the prior art, the high-modulus asphalt has high dynamic modulus and good track resistance and is easy to prepare, processing flow is short, processing equipment is simple, technological conditions are mild, production is quick, and the modification cost is low.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt preparation, and specifically relates to a high-modulus asphalt and a preparation method thereof. Background technique [0002] Due to the incompatibility of the performance of traditional ordinary asphalt and mixtures with the current use environment, some asphalt pavements suffered large-scale damage shortly after they were opened to traffic. Among the highway asphalt pavement diseases, rutting is the most serious. In the intersections of urban arterial roads and non-intersections with serious traffic channelization, as well as some roads on the expressway, excessive rutting occurs shortly after the opening of traffic. In addition, the traffic accident rate in these road sections has increased significantly, which has seriously reduced the use performance of the road. On expressways and urban arterial roads, excessive rutting results in reduced pavement performance, earlier maintenance...

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Problems solved by technology

[0004] At present, there are many ways to realize high-modulus asphalt. The materials used include No. 30 road petroleum asphalt, No. 50 road petroleum asphalt, No. 70 road petroleum asphalt, No. 90 road petroleum asphalt, PE, thermoplastic elastomers, additives, etc., but currently There is no mature production method for high-modulus asphalt, which can make the modified asphalt produced have high rutting factor, high dynamic shear modulus at 64°C, small dynamic shear phase angle at 64°C, good low-temperature performance, and the mixed asphalt after mixing The characteristics of high storage modulus and high loss modulus

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