Novel moistureproof layer repairing grouting material

Abstract

The invention relates to a novel moistureproof layer repairing grouting material, which is characterized by consisting of the following components: organosilicon, polyurethane and an aid, wherein the aid is a mixture of a coupling agent and a polyurethane foaming reaction regulator in a ratio of (1-5):(1-2). The invention has the advantages that: the novel moistureproof layer repairing grouting material has characteristics of the organosilicon and the polyurethane; by adding the foaming regulator, the polyurethane foaming speed can be reduced, so that the polyurethane can be effectively dispersed in a wall, and the foamed polyurethane can enhance the strength of mortar in brickwork joints; in the polyurethane foaming process, the polyurethane is reacted with water to generate carbon dioxide, pressure is formed in pores, and a larger dispersion area can be formed; and the organosilicon also can be dispersed to an effective section, and through the hydrophobicity of the organosilicon and the waterproofness and reinforcement of the polyurethane, the repaired moistureproof layer can form a multi-level continuous horizontal waterproof barrier.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a novel moisture-proof layer repair grouting material. Background technique [0002] There are a large number of old houses in cities and rural areas. After long-term use, the moisture-proof layer of the house foundation has been damaged, causing groundwater vapor to move upward through the capillary pores of the wall, and mildew and mildew in the plaster layer within about 1 meter above the indoor floor. Shelling, peeling and other phenomena, and the corresponding external wall parts have phenomena such as wall surface efflorescence and weathering. At present, the moisture-proof layer is mainly repaired by high-pressure grouting, and the materials used are mainly single silicone and polyurethane (polyurethane here refers to the isocyanate group-containing prepolymer formed by polymerization of isocyanate and polyester). pulp material. After a single silicone material is injec...

AI Technical Summary

Problems solved by technology

After a single silicone material is injected into the foundation wall through high-pressure grouting, because the wall is already in a wet state, the wall is already in a saturated state, and the wall cannot fully absorb the grouting material, resulting in poor repair effect. The slurry is suitable for the treatment of dry foundations

A single polyurethane grouting material is injected into the thick foundation wall by high-pressure grouting, which will foam when it encounters water and block the capillary pores of the wall, thereby preventing the upward movement of water vapor. However, because polyurethane foams faster when it encounters water, it will hinder The further diffusion of the grouting agent makes it difficult to form an effective waterproof barrier in the wall. The polyurethane grouting material is only suitable for the treatment of wet foundations and cannot be used in the repair of moisture-proof layers on dry foundations.