Environment-friendly fine crack grouting material

Abstract

The invention relates to an environment-friendly fine crack grouting material which consists of activated clay particles, mineral powder, silicate clinker, sodium thiosulfate, sodium fluosilicate, aluminium dihydrogen phosphate, lithium hydroxide and water. The activated clay particles are prepared by the following steps of: sieving stone and soil, crushing, stirring, pulping, separating slag and soil, filtering, delivering slurry and the like for undisturbed soil near the construction site; and adding sodium hydroxide which is 0.1-0.3% of clay in percentage by weight, and aging for more than 1 hour. The grain size of 90% of particles is smaller than 30mu m. The mineral powder is prepared by water quenching slag which is ground with the specific surface area greater than 400m<2> / kg. The environment-friendly fine crack grouting material provided by the invention has the advantages of low cost, low carbon and environment friendliness, good durability, low elastic modulus, strong anti-permeability property and the like, and can replace current cement or cement bentonite pouring materials to be applied to concretion and seepage-proofing pouring of fine cracks in rocks in projects such as water conservancy and hydropower, water conservancy and hydropower, municipal administration and the like.

Description

technical field [0001] The invention relates to the field of foundation treatment grouting in geotechnical engineering, and is a new grouting material, which is mainly suitable for consolidation and anti-seepage treatment of fine cracks in foundation rock mass of water conservancy and hydropower, embankment, municipal engineering and other projects. Background technique [0002] At present, the grouting materials used for the consolidation and anti-seepage of micro-cracks in rock mass are mainly organic and inorganic grouting materials. The organic grouting materials are mainly epoxy resins, acrylates, and urea-formaldehyde resins. The biggest defect of these materials is It has certain toxicity, great environmental pollution, poor durability and high price. It is generally used when the cement grouting material cannot be poured in or cannot meet the design requirements; while the inorganic grouting material is cement, fly ash, water glass Slurry materials are mainly used. T...

AI Technical Summary

Problems solved by technology

[0002] At present, the grouting materials used for the consolidation and anti-seepage of micro-cracks in rock mass are mainly organic and inorganic grouting materials. The organic grouting materials are mainly epoxy resins, acrylates, and urea-formaldehyde resins. The biggest defect of these materials is It has certain toxicity, great environmental pollution, poor durability and high price. It is generally used when the cement grouting material cannot be poured in or cannot meet the design requirements; while the inorganic grouting material is cement, fly ash, water glass Slurry materials are mainly used. The defects of these materials are mainly large water demand, large shrinkage, limited width of cracks that can be poured, high price, and poor impermeability.

[0003] Often when grouting does not require high strength, a certain amount of bentonite or clay is added to the cement paste, but because the cement hydrate does not react chemically with the bentonite or clay, the strength of the stone body is greatly reduced, and the comprehensive performance is limited. And the cost reduction is not obvious; at the same time, because the cement-based series of grouting materials is a high energy consumption and high carbon product, it does not conform to the current industrial development direction

Therefore, a low-carbon, non-toxic, environmentally friendly, energy-saving and economical micro-crack grouting material is needed to solve the problems of functionality, economy, environmental protection, energy saving and low-carbon in the existing micro-crack grouting treatment.