A polyurethane/silicate composite material for quickly repairing concrete pavement potholes and its preparation method

Abstract

The invention relates to a polyurethane / silicate composite material for rapidly repairing concrete pavement pit and a preparation method thereof. The composite material consists of a component A, a component B and a component C. The preparation method comprises the steps that the component A and the component B are rapidly and uniformly stirred according to the mass ratio of 1 to 1, and the component C is added and further uniformly stirred to obtain the polyurethane / silicate composite material. The uniformly stirred materials are timely poured and paved into the concrete pavement pit and slicked, and the surface is paved with fine sand to solidify and have transport service after 120min. The composite material has favorable cohesiveness with the original pavement fracture surface, and the solidified product has favorable rigidity, toughness, abrasive resistance, pressing resistance, fatigue resistance, skid resistance and energy absorption and noise reduction, so that the driving safety of vehicles is ensured, the purpose of rapidly repairing the pavement is achieved, and the time of blocking off traffic is reduced. The polyurethane / silicate composite material can be widely applied to rapid repairing of concrete buildings in the fields of municipal administration pavement, expressway and concrete playground and airports, and can be applied to filling and rapid maintenance of bridge flexible gaps.

Description

technical field [0001] The invention relates to a concrete pavement repair and maintenance material and a preparation method thereof, in particular to a polyurethane / silicate composite material for quickly repairing concrete pavement pits and a preparation method thereof. technical background [0002] In the road paving and maintenance mileage, cement road paving and maintenance account for about one-third. During the use of concrete pavement, due to repeated rolling of traffic loads, seasonal climate changes, freezing and thawing, and water erosion, concrete pavement is inevitable. The ground will produce subsidence, expansion, corrosion and other phenomena, which are specifically manifested as cracks, inclinations, surface concrete falling off the concrete pavement, and damage such as pockmarks and pits that are exposed. After the concrete pavement is damaged, it needs to be maintained and repaired in time. The use of suitable and ideal repair materials can not only quick...

AI Technical Summary

Problems solved by technology

[0009] Further analysis of the above-mentioned disclosed prior art has accelerated the repair time of concrete pavement to a certain extent, but there are still some problems. The first is that the repair and hardening time of the repair material with cement or epoxy cement as the main raw material is long, and the construction The progress is slow, which has a great impact on traffic, especially when the ambient temperature is low; second, the repair material with cement as the main raw material has high hardness, high brittleness, and high shrinkage rate. It is easy to break and peel off again under the action of water erosion; the third is that the strength of the repaired asphalt concrete as the main raw material is not uniform with that of the original concrete pavement, resulting in inconsistent load conduction after stress, easy to fall off after repairing, and the service life is relatively short

Fourth, the fiber-reinforced cement concrete has high strength, but it is difficult to mix and mix; the high-alumina cement hardens quickly, and the early strength is high under high temperature conditions, but the pot life and operability time are short, and it is not easy to adjust. The curing process has a certain shrinkage, and the ambient temperature The lower the hardening time is longer