Early-strength erosion-resistant clay cement paste

A technology of anti-erosion and clay water, which is applied in the field of clay cement paste, can solve the problems of hindering the curing speed of the slurry, not suitable for large-scale, large-scale engineering, and reducing the fluidity of materials, so as to reduce the elastic modulus and grouting Material cost, solution to operational instability of bentonite, improvement of calculus rate and effect of impermeability

Active Publication Date: 2014-04-30
湖南宏禹工程集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are also defects such as high cost, complicated pulping process, and difficult precise control of the coagulation time of the slurry against factors such as temperature, stirring uniformity, and mixing amount, which lead to premature solidification of the slurry in the pulping barrel; at the same time, due to the formation of Due to the high early strength of the grouting layer, it is easy to cause pipe fixing and buried pipe phenomenon during continuous grouting, which is not conducive to plugging under large area, large leakage volume or dynamic water conditions
[0004] And in the past patent application materials, Chinese patent CN96117823.X claims to protect a kind of clay curing slurry curing agent, this curing agent is mainly used for grouting and water stop under the condition of flowing groundwater, adopts clay cement with lower cost In order to control the gel speed, add water glass, but often because the slurry contains a lot of water and clay, it hinders the curing speed of the slurry
In the application of large-scale plugging and anti-seepage projects, it is easy to be washed out and destroyed by water due to the low early strength of the slurry stone; or the diffusion radius of the slurry cannot be effectively

Method used

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  • Early-strength erosion-resistant clay cement paste
  • Early-strength erosion-resistant clay cement paste
  • Early-strength erosion-resistant clay cement paste

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Experimental program
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Effect test

Embodiment 1

[0028] In Embodiment 1, the early-strength and anti-erosion clay cement slurry includes clay cement slurry and supporting modifiers, wherein the clay cement slurry is mainly composed of clay raw slurry, cement (PO42.5 Portland cement) , fly ash and water. The clay raw slurry is mainly made by mixing clay and water. In engineering practice, modifiers are added to the clay cement slurry. The amount of modifiers (the amount of modifiers accounts for The proportion of mass) is about 2%. The modifier is mainly made of a: sodium metaaluminate, b: sodium metasilicate pentahydrate powder, c: polyacrylamide and d: aluminum sulfate. The following table is selected The four groups of mass ratios in 1, the measured initial fluidity, erosion resistance rate, and stone body strength are shown in Table 1.

[0029]

Embodiment 2

[0031] In embodiment two, the clay cement slurry with early strength and erosion resistance includes clay cement slurry and a supporting modifier, wherein the clay cement slurry is mainly composed of clay original slurry, cement (PO42.5 Portland cement) , water and a small amount of modifier. The clay raw slurry is mainly made by mixing clay and water. The modifier content (the ratio of the modifier content to the cement mass) is 0.5%. The modifier is mainly composed of a : sodium metaaluminate, b: sodium metasilicate nonahydrate powder, c: polyacrylamide and d: aluminum sulfate are physically mixed and made, selected four groups of mass ratios in the following table 2, and measured the initial fluidity, resistance The erosion rate and stone body strength are shown in Table 2.

[0032]

[0033] And randomly select one group of anti-erosion clay cement slurry in above-mentioned two groups of embodiments to carry out erosion, and its slurry slurry erosion photo is as follows ...

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Abstract

The invention provides an early-strength erosion-resistant clay cement paste which comprises a clary cement paste and a matched modifier, wherein the clary cement paste is prepared from clay raw stock, cement and the balance of water; the clay raw stock is obtained by stirring clay with water, and the specific gravity of the obtained clary raw stock ranges from 1.15g/cm<3> to 1.40g/cm<3>; the ratio of the total mass of the clay in the clary raw stock and the cement to the mass of water ranges from 10: 7 to 10: 14; the modifier is composed of sodium metaaluminate, soluble sodium metasilicate powder, aluminum sulfate and polyacrylamide, and the content of the polyacrylamide accounts for 1-10% of the sum of the weights of the aluminum sulfate, the sodium metaaluminate and the soluble sodium metasilicate powder. The early-strength erosion-resistant clay cement paste has the advantages of good controllability, good water erosion resistance, short solidification time, high early strength, excellent anti-seepage performance, low cost, environmental protection and the like.

Description

technical field [0001] The invention relates to a grouting material in the field of geotechnical engineering foundation treatment materials, in particular to an early-strength and erosion-resistant clay cement paste. Background technique [0002] In water conservancy, hydropower, mining, transportation, underground space and other geotechnical engineering foundations in permeable strata and engineering emergency reinforcement treatment of Quaternary strong permeable strata anti-seepage, plugging and grouting projects, high-pressure rotary jet grouting is often required , cement grouting, pouring mortar or gravel, chemical grouting and other grouting techniques for anti-seepage and plugging. However, these traditional grouting processes often cause the loss of grouting materials due to high head pressure, fast groundwater velocity, large seepage flow, and large diffusion radius of the grout during grouting operations, resulting in large waste and poor anti-seepage and pluggin...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/26C04B22/14C04B22/08C04B111/70
Inventor 宾斌王雪龙周林
Owner 湖南宏禹工程集团有限公司
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