High-moisture content soft soil consolidating agent and application thereof

A technology of high moisture content and curing agent, which is applied in the field of soft soil curing agent and high moisture content soft soil curing agent, which can solve the problems of failure to fill pores, decrease in compression performance, and cracking of soil

Active Publication Date: 2019-03-19
CHINA UNIV OF MINING & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following two problems may occur if the design and use of the curing agent are improper: one is that when the moisture content of the soft soil is low, the free water is relatively small, and after the early ettringite hydration reaction begins, the strength of the solidified soil increases significantly and compresses The performance is obviously reduced, and the expansion stress of the later-generated ettringite not only fails to fill the pores and compact the soft soil, but will cause the previously soli

Method used

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  • High-moisture content soft soil consolidating agent and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 5

[0057] A high water content soft soil curing agent, comprising an expansive component and a gelling component, the expansive component includes sulphoaluminate cement clinker, gypsum and lime, and the gelling component is ordinary silicate Cement; wherein, the mass ratio of the expansion component to the gelling component is 0:100, 25:75, 50:50, 75:25 and 100:0, and the sulphoaluminate cement clinker and gypsum in the expansion component , The mass ratio of lime is 50:40:10.

[0058] When the curing agent prepared according to the above ratio is 16% in the amount of curing agent, 50%, 100% and 150% in water content, and 3 days and 28 days in the curing period, the average unrestricted average value of the solidified soil test blocks in each group The compressive strength values ​​are detailed in Table 1 below.

[0059] Table 1 The strength value (kPa) of solidified soil with different water content and different proportions

[0060]

[0061]It can be seen from Table 1 tha...

Embodiment 6

[0063] A high water content soft soil curing agent, comprising an expansive component and a gelling component, the expansive component includes sulphoaluminate cement clinker, gypsum and lime, and the gelling component is ordinary silicate Cement; wherein, the mass ratio of the expansion component to the gelling component is 25:75, and the mass ratio of the sulphoaluminate cement clinker, gypsum and lime in the expansion component is 40:48:12.

[0064] The curing agent prepared according to the above ratio, when the curing agent dosage is 8% and the water content is 100%, the average unconfined compressive strength of the solidified soil test block for 3 days is 254kPa, and the average unconfined compressive strength for 28 days is 254kPa. The compressive strength is 485kPa.

Embodiment 7

[0066] A high water content soft soil curing agent, comprising an expansive component and a gelling component, the expansive component includes sulphoaluminate cement clinker, gypsum and lime, and the gelling component is ordinary silicate Cement; wherein, the mass ratio of the expansion component to the gelling component is 25:75, and the mass ratio of the sulphoaluminate cement clinker, gypsum and lime in the expansion component is 60:32:8.

[0067] With the curing agent prepared according to the above ratio, when the curing agent dosage is 25% and the water content is 100%, the average unconfined compressive strength of the solidified soil test block for 3 days is 2648kPa, and the average unconfined compressive strength for 28 days is 2648kPa. The compressive strength is 4216kPa.

[0068] According to the function of each component in the embodiment, other similar components or industrial waste residues can be used instead, but its activity must be improved through physical...

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Abstract

The invention discloses a high-moisture content soft soil consolidating agent and application thereof. The high-moisture content soft soil consolidating agent is composed of an expanding component anda gelatinizing component, wherein the expanding component is composed of sulphoaluminate cement clinker, gypsum and lime, and the gelatinizing component is ordinary Portland cement; the weight ratioof the expanding component and the gelatinizing component is 0-100:100-0, and the weight ratio of the sulphoaluminate cement clinker, the gypsum and the lime of the expanding component is 40-60:32-48:8-12. The high-moisture content soft soil consolidating agent can be applied to consolidating muddy soil, sandy soil or silty soil with a moisture content as high as 50-150%; the construction processof the high-moisture content soft soil consolidating agent comprises construction methods of deep mixed piles, high-pressure jet grouting piles of a double-slurry grouting system. The high-moisture content soft soil consolidating agent solves coordination of production amount and speed of ettringite and C-S-H (calcium silicate hydrate) gel, makes full use of water absorbency of the expanding component, pore filling of the ettringite and bonding effects of compaction clay and the C-S-H gel.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a soft soil curing agent, in particular to a high water content soft soil curing agent and its application. Background technique [0002] Soft soil generally refers to saturated soft cohesive soil deposited in still water or slow water flow environment. Common types of soft soil include silt, muddy soil, soft cohesive soil, peat, peaty soil, etc. Soft soil has engineering characteristics such as high water content, large void ratio, low strength, high compressibility, low permeability coefficient, high sensitivity, structure, high salinity, high organic matter, etc., and is often in a flow plastic or soft plastic state. [0003] The water content of soft soil with high water content is greater than the liquid limit and the void ratio is greater than or equal to 1.0. Most of the water exists between soil particles in the form of free water, which keeps the friction betwee...

Claims

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Application Information

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IPC IPC(8): C04B28/18E02D5/46E02D3/12
CPCC04B28/188E02D3/12E02D5/46C04B22/143C04B22/064C04B7/02C04B14/361
Inventor 韩有民夏军武江莉王同雷袁猛
Owner CHINA UNIV OF MINING & TECH
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