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Early-strength micro-expanding type soil solidifying agent and preparation method thereof

A technology of soil solidifying agent and micro-expansion agent, applied in the field of building materials, can solve problems such as waste of resources, achieve the effect of realizing micro-expansion performance, significant economic and environmental benefits, and inhibiting shrinkage cracking

Inactive Publication Date: 2017-05-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is not used rationally, it will not only cause a waste of resources, but also bring great pressure to the surrounding environment.

Method used

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  • Early-strength micro-expanding type soil solidifying agent and preparation method thereof
  • Early-strength micro-expanding type soil solidifying agent and preparation method thereof
  • Early-strength micro-expanding type soil solidifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to the specific embodiment of the present invention, the soil curing agent used is based on parts by mass, and its raw materials are composed of: 23 parts of lime, 12 parts of rice husk ash, 60 parts of fly ash, and 4 parts of phosphogypsum.

[0032] Mix and grind the above raw materials in a ball mill until the specific surface area is greater than 350cm 2 / g, or 0.08mm sieve is less than 10%. Adding 6% into the soil used, the unconfined compressive strength of the consolidated soil test block was measured to be 2.23MPa at 7 days, and the permeability coefficient was 2.13×10 -5 k / (cm s -1 ).

Embodiment 2

[0034] According to the specific embodiment of the present invention, the soil curing agent used is based on parts by mass, and its raw materials are composed of: 23 parts of lime, 18 parts of rice husk ash, 60 parts of fly ash, and 4 parts of phosphogypsum.

[0035] Mix and grind the above raw materials in a ball mill until the specific surface area is greater than 350cm 2 / g, or 0.08mm sieve is less than 10%. Adding 6% into the soil used, the unconfined compressive strength of the consolidated soil test block was measured at 7 days to 2.67MPa, and the permeability coefficient was 1.02×10 -5 k / (cm s -1 ).

Embodiment 3

[0037] According to the specific embodiment of the present invention, the soil curing agent used is based on parts by mass, and its raw materials are composed of: 23 parts of lime, 18 parts of rice husk ash, 60 parts of fly ash, and 7 parts of phosphogypsum.

[0038] Mix and grind the above raw materials in a ball mill until the specific surface area is greater than 350cm 2 / g, or 0.08mm sieve is less than 10%. Adding 6% into the soil used, the unconfined compressive strength of the consolidated soil test block was measured to be 2.84MPa at 7 days, and the permeability coefficient was 6.23×10 -6 k / (cm s -1 ).

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Abstract

The invention discloses an early-strength micro-expanding type soil solidifying agent and a preparation method thereof. The soil solidifying agent is prepared from the following raw materials in parts by weight: 15-30 parts of a lime raw material, 10-20 parts of an early-strength promoting and anti-permeability promoting agent, 30-70 parts of an active enhancing material and 3-8 parts of a micro-expanding agent, wherein the lime raw material is any one or mixture of slaked lime, quick lime and carbide slag; the early-strength promoting and anti-permeability promoting agent is rice hull ash or white carbon black or a combination of the rice hull ash and the white carbon black; the active enhancing material is coal ash or slag powder or a combination of the coal ash and the slag powder; the micro-expanding agent is a gypsum material. By virtue of the actions of the early-strength promoting and anti-permeability promoting agent and the like, the early strength of a soil body solidified by virtue of lime soil solidifying agents is remarkably enhanced, the solidifying period is shortened, and the water stability of the soil body is improved; the sustainable growth of the strength of the solidified water body is realized, and meanwhile, the soil solidifying agent has the micro-expanding property, so that the shrinkage cracking is inhibited; by utilizing a large number of solid waste such as carbide slag, coal ash, slag, rice hull ash and ardealite, the economic and environment-friendly benefits are remarkable.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to an early-strength micro-expansion soil curing agent and a preparation method. Background technique [0002] Soil stabilizer is a new type of environmental protection and energy-saving engineering material synthesized from various organic and inorganic materials. During the construction process, the curing agent and the soil are mixed evenly, and the distance between soil particles becomes smaller under the action of external pressure, and a series of physical and chemical reactions occur with the curing agent to fill the gaps between particles, improve the surface properties of soil particles and generate gel The role of matter in agglomerating soil. Soil stabilizer has many advantages such as wide sources of production raw materials, local materials, simple construction process, and low engineering cost. Therefore, the use of soil stabilizer to stabilize soil is of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B28/16
CPCC04B28/143C04B28/14C04B28/142C04B28/16C04B2111/00732C04B2201/05C04B2201/50C04B22/064C04B18/101C04B18/08
Inventor 陈潇朱国瑞王杰周明凯陈谦
Owner WUHAN UNIV OF TECH
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