Tunnel leaking stoppage patching material and preparation method thereof

Abstract

The invention discloses a tunnel leaking stoppage patching material, which comprises dry powder sand and bonding waterproof emulsion, wherein the weight ratio of the dry powder sand and bonding waterproof emulsion is 1: 1-1.5. The dry powder sand is prepared from, by weight percent, 20-40% of Portland cement, 5-14% of fly ash, 20-40% of silicon dioxide, 0.5-1.5% of propyl cellulose, 5-9% of capillary crystalline material, and 0.1-6% of bentonite; the total amount of the dry powder sand is 100%; the bonding waterproof emulsion is prepared from 4-65% of acrylate emulsion, 10-35% of vinyl acetate- ethylene copolymer emulsion, 10-18% of polyving akohol glue powder fluid, 3-7% of water-soluble methyl silicon emulsion, 1-6% of propylene glycol, 1-5% of sodium tripolyphosphate, 0.5-1.5% of aluminium hydroxide, and 0.01-0.05% of antifoaming agent. The leaking stoppage patching material is compounded with organic polymer and inorganic matter; the material reflects rigidity of the inorganic material, dimension stability, and shows the flexibility and processing property of the polymer; the product has good elasticity, flexibility, and moderate rigidity.

Description

technical field [0001] The invention belongs to the field of tunnel engineering, and relates to a plugging and repairing material, in particular to a tunnel plugging and repairing material and a preparation method thereof. Background technique [0002] The plugging materials currently used mainly include the following types. One is ordinary cement plus coagulant. The coagulant is divided into inorganic and organic. The inorganic coagulant is commonly used with water glass, and the organic coagulant includes organic solution. , fatty acid metal salts, etc., the advantages of this type of material: the setting time is very fast, and it can quickly plug leaks; the second type is synthetic plugging materials, which are composed of ordinary cement and waterproof materials, and are mostly made into waterproof coatings; the third type Use fast-hardening sulphoaluminate cement to achieve rapid plugging effect. [0003] Some of the above common plugging materials have too fast setti...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, such as too fast setting time, weak bonding performance, poor shrinkage coefficient control, etc., and provide a new type of tunnel plugging material.