A new type of cement modified red sandy soil additive composition

Abstract

The invention relates to a novel cement-modified arenosol additive composition, comprising the following raw materials: lime, calcium oxide, a monomolecular biquaternary ammonium salt, polyvinyl alcohol and potassium chloride, wherein the mass ratio of the lime to calcium oxide to the monomolecular biquaternary ammonium salt to polyvinyl alcohol to potassium chloride is 1 to (0.2-0.5) to (0.2-0.5) to (0.2-0.5) to (4-5). The lime, calcium oxide, the monomolecular biquaternary ammonium salt, polyvinyl alcohol and potassium chloride disclosed by the invention take an aqueous solution as a transfer medium, and are easily dissolved into water; molecules of a film agent take the interaction of static electricity as film-forming power; effective molecules of the film agent are deposited on electronegative strong hydrophilic clay particles of arenosol to form a nanoscale ultrathin film; the negative charge quantity on the soil surface is reduced; the arenosol is insensitive to water molecules; the arenosol is obviously weakened. The cement-modified arenosol additive composition reacts with the arenosol and does not generate dissolution action, so that the property of the arenosol can still achieve the established target under the effect of water, and the additive amount of cement when the arenosol is subjected to cement modification is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a red sandy soil cement modification additive, in particular to a red sandy soil additive capable of reducing swelling and shrinkage, water sensitivity and dispersibility of red sandy soil. Background technique [0002] Cement-modified soil refers to mixing a certain proportion of cement into the soil material to improve the properties or structure of the soil, to make the red sandy soil lose its expansion potential, to enhance the cohesion of the sandy soil, etc., and to a certain extent improve the soil quality. The strength or bearing capacity of the body, and the overall improvement of the construction technology of the stability of the soil. At present, there are extensive studies on it at home and abroad. It is often used as a cement soil subbase and base, and as a semi-rigid surface layer. It can achieve a good stability effect. The middle route project of t...

AI Technical Summary

Problems solved by technology

[0002] Cement-modified soil refers to mixing a certain proportion of cement into the soil material to improve the properties or structure of the soil, to make the red sandy soil lose its expansion potential, to enhance the cohesion of the sandy soil, etc., and to a certain extent improve the soil quality. The strength or bearing capacity of the body, and the overall improvement of the construction technology of the stability of the soil. At present, there are extensive studies on it at home and abroad. It is often used as a cement soil subbase and base, and as a semi-rigid surface layer. It can achieve a good stability effect. The middle route project of the South-to-North Water Diversion Project uses cement-modified soil for the replacement of sandy canal slopes. The semi-rigid structure of the cement-modified soil is used to prevent the slope from collapsing. The body has the disadvantages of hardening and cracking. For sandy soil with a high sand content, even if a higher cement content is used in time, it is still impossible to obtain a cement-modified soil with good stability. For various types of soil cement The effect of modification is also different