Grouting material for grouting type composite asphalt pavement

Abstract

The invention belongs to the field of cement grouting materials, and particularly relates to a grouting material for a grouting type composite asphalt pavement. The grouting material is prepared from, by weight,: 40-80 parts of cement; 5-15 parts of silicon powder; 15 to 32 parts of aeolian sand; 6-20 parts of mineral powder; 0.05-3 parts of a water reducing agent; 0-0.5 part of bentonite; 0.05-0.3 part of cellulose; 2-3 parts of carbon black; 3-6 parts of a rapid hardening agent; 0.3-0.5 part of lithium carbonate; 0.1-0.2 part of an expanding agent; 10-30 parts of polydimethylsiloxane; 2-10 parts of methyl vinyl bis(N-methyl acetamido)silane; and 3-10 parts of N, N-dimethyl formamide. Specifically, when the grouting material is prepared on a construction site, water accounting for 12-18% of the total mass of the raw materials is added; the aeolian sand has the characteristics of small particle size, uniform particle size, looseness, no aggregation and non-plasticity, so that the grouting material has high fluidity; in addition, the polydimethylsiloxane makes up for the non-cohesiveness of the aeolian sand, and the adhesive capacity of the grouting material is effectively improved.

Description

technical field [0001] The invention belongs to the field of cement grouting materials, in particular to a grouting material for pouring composite asphalt pavement. Background technique [0002] At present, the road surface is generally asphalt pavement. As the asphalt material itself transfers heat quickly, the grouting material will crack due to thermal stress during temperature changes. After the pavement is cracked, it will cause water penetration on the pavement and damage to the edge of the crack, which will further damage the asphalt pavement. Therefore, it is necessary to use grout to repair the pavement. [0003] At present, cement grouting materials mainly have the following disadvantages: [0004] Since the grouting material must have a certain degree of fluidity, the grouting material with high fluidity will have the problem of the settlement of the grouting structure, resulting in road damage. [0005] The grouting material tends to shrink during the hardening...

AI Technical Summary

Problems solved by technology

[0004]Because the grouting material must have a certain fluidity, the grouting material with high fluidity will have the problem of grouting structure settlement, resulting in road damage

[0005]The grouting material tends to shrink during the hardening stage. The shrinkage phenomenon will lead to the phenomenon of not tight filling joints and cracks. However, the existing cement grouting materials generally only use A single-component expansion agent (such as patent CN105503068B) is used to compensate for shrinkage, but there is no effective compensation method for shrinkage in the plastic stage, and it is easy to cause the grouting to be not dense enough to effectively fill the void structure

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