Pavement repairing material and pavement repairing method

Abstract

The invention relates to a pavement repairing material and a pavement repairing method, and belongs to the technical field of a building material. The pavement repairing material comprises the following components in percentage by weight: 20 to 90 parts of heavy traffic asphalt, 10 to 30 parts of natural sand, 10 to 20 parts of polypropylene fibers, 10 to 12 parts of a surfactant, 20 to 30 parts of emulsified asphalt, 10 to 60 parts of a polycarboxylic water reducer, 20 to 40 parts of expanded perlite and 10 to 15 parts of an assistant. The preparation method comprises the following steps: uniformly mixing the heavy traffic asphalt, the natural sand, the surfactant, the emulsified asphalt, the polycarboxylic water reducer, the expanded perlite and the assistant; warming to a temperature of70 to 80 DEG C and stirring for 2 to 3h; cooling to the room temperature; adding the polypropylene fibers; warming to a temperature of 100 to 120 DEG C; and after 20 to 30min, carrying out cooling. The highway pavement rapid repairing material provided by the invention is higher in repairing intensity.

Description

technical field The invention relates to a pavement repair material and a pavement repair method, belonging to the technical field of building materials. Background technique The problem of repairing cement concrete pavement slabs has not been well solved, and one of the fundamental problems is that the performance of repairing materials is not ideal. The materials used for the repair of cement concrete pavement slabs must meet the following technical requirements: ① Fast hardening and high early strength: Pavement repair is different from ordinary concrete pavement construction. Time closed to traffic. Therefore, the repair material must have the properties of rapid hardening, so that the repaired pavement can meet the strength requirements of open traffic in a short time. ②Small shrinkage: For cement concrete pavement repair, the joint part of new and old concrete is often the weakest link. One of the important reasons for the poor combination of new and old concrete is...

AI Technical Summary

Problems solved by technology

④Stable performance in the later period, and the strength development is basically synchronized with the old concrete: the later strength development speed of the repair material should be basically the same as that of the old concrete, and the strength attenuation should not occur, but the strength should not develop too fast, resulting in too large a difference in the mechanical properties of the new and old concrete. affect the overall performance of the pavement

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