Mixed slurry for foundation treatment engineering, and preparation method thereof

Abstract

The invention discloses mixed slurry for foundation treatment engineering, and a preparation method of the mixed slurry, wherein the mixed slurry comprises 30-40 parts of lightweight cement, 20-30 parts of modified slag powder, 15-20 parts of wollastonite powder, 10-15 parts of sodium silicate, 10-15 parts of potassium silicate, 8-12 parts of an additive, 6-8 parts of sawdust and the balance of clear water. According to the invention, the lightweight cement can enable slurry to meet the requirements of density, strength and fluidity, the modified slag powder can improve the grinding property and miscibility of the slag powder and improve the pressure resistance of the slurry, the wollastonite powder can improve the acid and alkali resistance and strength of the slurry and improve the hygroscopicity of the slurry after application, and the mixture of sodium silicate and potassium silicate is used as a coagulant to shorten the setting time of the mixed slurry during use and enhance the compressive strength, so that the mixed slurry for foundation treatment engineering can meet the requirements on density, strength and flowability on the basis of reducing self-weight load, and the compressive strength of the slurry is improved. The preparation method has the same advantages.

Description

technical field [0001] The invention belongs to the technical field of building engineering materials, in particular to a mixed slurry for foundation treatment engineering and a preparation method thereof. Background technique [0002] The land area of ​​our country is vast, so the soil quality is varied, and the strength and compression characteristics of the foundation soil vary greatly depending on the soil quality. In engineering construction, when the natural foundation cannot meet the requirements of the building foundation for the foundation, various pretreatment methods must be adopted to increase the shear strength of the foundation soil, improve the compressive properties of the soil, and increase the bearing capacity of the foundation to meet the requirements of the foundation. building construction needs. Grouting is a commonly used method to improve foundation performance, also known as grouting, which is to prepare specific materials into grout, and use pressu...

AI Technical Summary

Problems solved by technology

For example, there is now a formula and preparation method of mixed slurry for foundation treatment engineering. The prepared slurry consists of 25% cement, 25% fly ash, 25% heavy calcium powder, 3% foaming agent, 6% wood chips, water 16% composition, good injectability, low permeability of solid body, stable performance, can meet the technical requirements of foundation engineering, but the grout used for compaction grouting needs to have higher viscosity and lower fluidity, and at the same time , due to the self-heavyness of cement-soil, part of the bearing capacity of traditional cement-soil piles is used to bear the self-weight load. In soft soil areas, the larger self-weight of the pile body will also cause greater settlement of the underlying layer of the composite foundation

It can be seen that the above prior art has the following problems: the existing mixed grout for foundation treatment engineering has low viscosity and weak fluidity, and is not suitable for the compaction grouting process; Part of it is used to bear the self-weight load. In the soft soil area, the large self-weight of the pile will also cause a large settlement of the underlying layer of the composite foundation.

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