Hot melt adhesive for road expansion joints and preparation method thereof

Abstract

The invention discloses a hot melt adhesive for road expansion joints and a preparation method of the hot melt adhesive, the hot melt adhesive comprises the following components in parts by weight: 15-35 parts of polyurethane elastomer, 15-25 parts of reactive elastomer, 15-25 parts of terpene resin, 0-5 parts of polyethylene wax, 5-10 parts of white oil and 40-60 parts of hard asphalt particles, the polyurethane elastomer is thermoplastic linear polyurethane elastomer terminated by C = C double bonds, the invention relates to a polyurethane adhesive which comprises the following components in parts by weight: 35-50 parts of polyether polyol, 5-10 parts of a chain extender, 30-40 parts of isocyanate and 5-10 parts of olefin alcohol. The hot melt adhesive for the expansion joint is prepared through twin-screw extrusion granulation equipment, the problems that existing asphalt for the expansion joint is poor in adhesion to stone and a mixture is prone to cracking are solved, and the service life of a pavement structure is effectively prolonged; meanwhile, the problems of high production temperature, long time, tedious feeding, large smoke, high energy consumption and the like of the expansion joint hot melt adhesive are effectively avoided, the defect of high viscosity of the expansion joint hot melt adhesive is overcome, the construction temperature is reduced, and the construction workability is improved.

Description

technical field [0001] The invention relates to the field of road and bridge materials, in particular to a hot melt adhesive for road expansion joints and a preparation method thereof. Background technique [0002] The cementing materials used in the paving of the road and bridge seamless expansion joints are all based on waste tire rubber powder as the main modifier, with a small amount of SBS, light oil and other materials to improve the flexibility and low temperature performance of the asphalt, and at the same time add a large amount of inorganic fillers, Such as stone powder, mineral powder, heavy calcium, etc., to improve the high temperature rutting resistance, so that the binder for expansion joints has both high and low temperature performance. The cracking problem of asphalt-based seamless expansion joints often occurs. [0003] Due to the addition of a large amount of organic modifiers such as SBS and rubber powder and inorganic fillers such as stone powder, the ...

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Problems solved by technology

[0005] One of the objectives of the present invention is to provide a hot melt adhesive for road expansion joints, which can greatly improve the bonding performance with stone materials and its own flexibility, improve the service life of pavement structures, and at the same time solve the problem of the existing cement used for expansion joints. When feeding is cumbersome, the flue gas is relatively large, and the viscosity of the output is too high to be pumped; in order to achieve the above purpose, the present invention specifically adopts the following technical solutions:

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