High viscosity high elasticity asphalt modifier and preparation method thereof

Abstract

The invention belongs to the technical field of asphalt modifier, in particular relates to a high viscosity high elasticity asphalt modifier and a preparation method thereof. The high viscosity high elasticity asphalt modifier is characterized in that the high viscosity high elasticity asphalt modifier is prepared by raw materials of a primary modifier, a tackifier, an anti-ageing component, a plastifying component and a stabilizer with the mass proportioning being 100:20-40:18-32:15-30:2-5 sequentially; the primary modifier is of phenylethylene-butadiene-phenylethylene segmented copolymer; the tackifier is petroresins or abietic resin; the anti-ageing component is activated rubber powder; the plastifying component is dioctyl phthalate or dibutyl phthalate; and the stabilizer is sulfur. The asphalt modifier prepared by the method can improve high temperature stability, low temperature anti-cracking performance, anti-ageing performance and elasticity restoration capability of asphalt.

Description

technical field [0001] The invention belongs to the technical field of asphalt modifiers, in particular to a high-viscosity and high-elasticity asphalt modifier and a preparation method thereof. Background technique [0002] With the rapid development of highway traffic in our country, the construction of long-span bridges, especially large bridges across rivers and seas, has developed rapidly. For long-span bridges, the steel-concrete composite beam structure is used to effectively prevent the asphalt mixture on the steel deck from being difficult to bond with the steel plate at high temperatures and co-deform, which will cause the bridge deck pavement to move, embrace, etc. problem. However, the composite girder deck is spliced ​​by prefabricated prestressed concrete slabs, which causes technical problems such as waterproofing of the bridge deck and preventing reflection cracks in the composite beam deck pavement. The middle layer of stress-absorbing film is widely used ...

AI Technical Summary

Problems solved by technology

However, due to the relative backwardness of my country's rubber powder industry, rubber powder is mostly directly cut from waste tires without desulfurization treatment, and the particle shape is not good. Domestic rubber asphalt is difficult to meet the requirements of the stress-absorbing intermediate layer.

[0003] For the above problems, some people successively invented products such as TPS modifier to improve the high-temperature bonding performance and high-temperature stability of asphalt, but its low-temperature crack resistance and elastic recovery ability are poor.

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