A polymer material for quickly repairing cracks in asphalt pavement and its preparation method

Abstract

The invention relates to a polymer material for quickly repairing cracks of an asphalt pavement and a preparation method thereof. The polymer material is prepared by mixing two components A and B and quickly solidifying the mixed components, wherein the component A comprises the following ingredients in parts by weight: 41-60 parts of polyoxypropylene diol N220, 25-20 parts of polyoxypropylene diol N210, 1-0.4 part of carbon black, 2-1 part of a catalyst, 20.5-15.5 parts of glycerol triacetate, 8-1 part of a chain extender, 2 parts of a latent curing agent, 0.5-0.1 part of a BYK-535 defoaming agent and 50-80 parts of water absorbent microcapsules; the component B is 100 parts of polyether urethane prepolymers; mixing the component A with the component B according to the mass ratio of (1.5-1.8) : 1 to solidify so as to obtain the polymer material for quickly repairing the cracks of the asphalt pavement. The non-flowing time of the prepared polymer material is shorter than 5 min at 20 DEG C, and if being applied to repair the cracks of the asphalt pavement, the prepared polymer material can be solidified after 30 min and the asphalt pavement has the transportation service. The asphalt pavement repairing polymer material has a self-repairing function so as to prevent a situation that the repaired pavement is cracked again due to the reduced temperature; the crack repairing process is simple, the repairing speed is high, the construction efficiency is high, the application effect is good, no pollution generates, the production is clean, and the polymer material is green and environment-friendly.

Description

technical field [0001] The invention relates to a polymer material for repairing asphalt pavement cracks and a preparation method thereof, in particular to a polyurethane material with self-repair function for quickly repairing asphalt pavement cracks and a preparation method thereof. [0002] technical background [0003] Cracks are one of the most common and most prone early diseases of pavement. Although the initial cracks have no obvious impact on the performance of the highway pavement, if the cracks appearing on the highway pavement are not treated in time, the rainwater will infiltrate along the cracks and accumulate under the pavement panel. The action of rainwater and roadbed produces mud pumping, which then makes the road surface hollow, which seriously leads to the breakage of the road slab and the appearance of potholes, which causes structural damage to the road surface and reduces the service life of the road surface. Filling joint maintenance treatment. [00...

AI Technical Summary

Problems solved by technology

[0012] The above pavement crack repair materials have their own advantages and characteristics, but there is a common deficiency or defect, that is, in the cold winter, the cracks become wider when they are cooled, and the above crack repair materials will shrink when they are cooled, causing the original repaired cracks to crack again. In winter, snow water will enter the cracks again, and the water in the cracks will expand when frozen, which will cause greater harm to the roadbed.

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