High-viscosity and high-modulus asphalt modifier and preparation method thereof

Abstract

The invention belongs to the technical field of asphalt modification. The invention relates to an asphalt modifier, in particular to a high-viscosity high-modulus asphalt modifier. The asphalt modifier is prepared from the following raw materials in parts by weight: 100 parts of a styrene-butadiene-styrene block copolymer, 30-35 parts of a high-modulus main agent, 20-30 parts of a high-viscosity main agent, 10-15 parts of butadiene styrene rubber, 1-5 parts of zinc oxide, 1-5 parts of carbon black, 2-4 parts of glass fibers, 1-5 parts of an efficient solubilizer and 1-3 parts of an antioxidant. The preparation method comprises the following steps: (1) weighing the styrene-butadiene-styrene block copolymer, the high-modulus main agent, the high-viscosity main agent, the styrene-butadiene rubber, the efficient solubilizer and the antioxidant, sequentially adding into a stirring device, and stirring at room temperature for 20 minutes to obtain a mixture; and (2) adding zinc oxide, carbonblack and glass fiber into the mixture, stirring for 10 minutes, and then extruding and granulating by adopting a double-screw extruder to obtain the high-viscosity and high-modulus asphalt modifier.

Description

technical field [0001] The invention belongs to the technical field of asphalt modification, and in particular relates to a high-viscosity and high-modulus asphalt modifier and a preparation method thereof. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid. It is liquid with a black surface and is soluble in carbon disulfide. Asphalt can be divided into coal tar pitch, petroleum pitch and natural pitch. Among them, coal tar pitch is a by-product of coking, petroleum pitch is the residue after crude oil distillation, and natural pitch is stored underground, and some form ore layers or accumulate on the surface of the earth's crust. Asphalt is mainly used in coatings, plastics, rubber and other industries as well as paving roads. Asphalt pavement mainly includes the following performances: low temperature brittle crack ...

AI Technical Summary

Problems solved by technology

For example, if we want to improve the high-temperature anti-rutting ability of asphalt pavement, we will increase the amount of aggregates, use coarsely graded aggregates, use aggregates with larger particle sizes, and appropriately reduce the amount of asphalt. Asphalt has the problem of high stiffness at low temperature, poor fatigue resistance, and easy cracking