A kind of geopolymer soft soil binder and preparation method thereof

Abstract

The invention provides a geopolymer type soft soil bonding agent and a preparation method thereof, wherein the geopolymer type soft soil bonding agent is prepared from the following raw materials in parts by weight: 65 to 75 parts of industrial waste residue, 20 to 30 parts of metakaolin, 5 to 12 parts of potassium metasilicate and 0.3 to 1 part of activating agents. The bonding agent has excellent modification dewatering and bonding effects on soft soil type fine particles (including silt, mucky soil, sludge, over-wet soil and the like); the action object of the soft soil bonding agent is soft soil type fine particles; 65 percent or more of raw materials are industrial solid wastes. Therefore during the industrial solid waste treatment, the waste treatment by waste can be realized; the raw material composition ingredients of the soft soil bonding agent are simple; the material taking is convenient; the product quality can be easily controlled. The energy consumption of the preparationmethod is low; the environment pollution is low; the environment-friendly effect is very good.

Description

technical field [0001] The invention relates to the field of fine chemical industry, in particular to a geopolymer soft soil binder and a preparation method thereof. Background technique [0002] Soft soil refers to fine-grained soil formed in coastal, lagoon, delta, river and lake sedimentary environments, with a natural void ratio greater than or equal to 1.0 and a natural water content greater than the liquid limit. It mainly includes silt (natural void ratio e>1.5), muddy soil (natural void ratio 1.0<e<1.5), etc. The fine particle characteristics of soft soil make it easy to absorb toxic and harmful substances and become a secondary pollution source; the high porosity characteristic makes its mechanical properties not meet the requirements of engineering soil, and dumping will occupy a large amount of land resources. Therefore, soft soil has become one of the solid wastes that are difficult to handle and need to be treated urgently. [0003] With the vigorous ...

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Problems solved by technology

The patent has the following two deficiencies: ①The raw materials are too diverse, and the complex composition brings great difficulties to production, and the product quality is difficult to control; Friendly material, and there are hidden dangers in the later water resistance and durability

The patent has the following disadvantages: ①The raw material is aluminate cement as the main raw material, which is not an environmentally friendly material; ②The modifier formula I compound is a refractory aromatic hydrocarbon, and there is a hidden danger of environmental pollution during use

[0005] To sum up, in the process of soft soil cementation and solidification, cement-based binders have problems such as high alkalinity affecting the surrounding environment, poor acid and alkali resistance restricting engineering applications, etc.; lime-based binders have disadvantages such as poor water resistance and poor durability; Since the current improved materials still use cement and lime as the main raw materials, in addition to the problems of cement and lime curing agents, there are also problems such as the complexity of the raw material composition, difficulty in controlling product quality, and the potential environmental pollution of the imported modifiers.

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