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A wall protection slurry powder based on high-calcium and high-sulfur coal-fired ash

A coal-fired ash and high-sulfur technology, which is applied in the field of wall protection mud, can solve the problems of inconvenient and lacking engineering applications, and achieve the effects of reducing preparation costs, reducing water consumption, and improving slurry production rate

Active Publication Date: 2021-06-15
CHONGQING CONSTR ENG NEW BUILDING MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lack of commercialized wall protection mud products that can be used directly by adding water on site makes engineering application extremely inconvenient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of wall protection slurry powder based on high-calcium and high-sulfur coal-fired ash of this embodiment is obtained by using the following proportions of main materials and auxiliary materials in the powder state that are uniformly mixed:

[0049] 70 parts of high calcium and high sulfur coal burning ash;

[0050] 20 parts of bentonite;

[0051] 10 parts of carbide slag;

[0052] 0.5 parts of sodium bicarbonate;

[0053] 0.30 parts of lignosulfonate;

[0054] 2.0 parts of redispersible latex powder;

[0055] 0.15 parts of hydroxypropyl methylcellulose ether;

[0056] 0.015 parts of polyacrylamide;

[0057] Wherein, the high-calcium and high-sulfur coal-fired ash is processed by grinding, and the specific surface area reaches 600-800㎡ / kg; the redispersible latex powder is polyvinyl acetate-ethylene copolymer latex powder; the hydroxy The viscosity of propyl methylcellulose ether is 50,000 to 100,000 Pa·s.

[0058] When the wall protection slurry powder bas...

Embodiment 2

[0063] Compared with Example 1, this example differs only in that the proportions of the materials are different, and the proportions of the materials in this example are as follows:

[0064] 75 parts of high calcium and high sulfur coal burning ash;

[0065] 15 parts of bentonite;

[0066] 10 parts of carbide slag;

[0067] 0.5 parts of sodium bicarbonate;

[0068] 0.30 parts of lignosulfonate;

[0069] 1.5 parts of redispersible latex powder;

[0070] 0.15 parts of hydroxypropyl methylcellulose ether;

[0071] 0.02 parts of polyacrylamide;

[0072] The remainder of this embodiment is identical to Embodiment 1.

Embodiment 3

[0074] Compared with Example 1, this example differs only in that the proportions of the materials are different, and the proportions of the materials in this example are as follows:

[0075] 80 parts of high calcium and high sulfur coal burning ash;

[0076] 12 parts of bentonite;

[0077] 8 parts of carbide slag;

[0078] 0.8 parts of sodium bicarbonate;

[0079] 0.20 parts of lignosulfonate;

[0080] 1.5 parts of redispersible latex powder;

[0081] 0.10 parts of hydroxypropyl methylcellulose ether;

[0082] 0.03 parts of polyacrylamide;

[0083] The remainder of this embodiment is identical to Embodiment 1.

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Abstract

The invention discloses a wall protection slurry powder based on high-calcium and high-sulfur coal-fired ash. Carbide slag, the high-calcium and high-sulfur coal-fired ash and bentonite are used as the main material of the pulping agent, and the calcium carbide slag is used as the activator. The invention has the advantages of being more convenient for on-site construction and use, can be directly added to form wall protection mud, can better reduce costs, and can better improve the quality of finished wall protection mud.

Description

technical field [0001] The invention belongs to the technical field of wall protection mud, and in particular relates to a wall protection slurry powder based on high calcium and high sulfur coal burning ash. Background technique [0002] Wall protection mud refers to a kind of mud that forms mud skin on the hole wall to strengthen the hole wall and prevent collapse during the hole construction of mechanical hole filling piles or the excavation of underground cut-off walls, which can ensure construction safety and stabilize the water level in the hole . [0003] Wall retaining mud is usually a mixed slurry formed by mixing bentonite (or clay) and additives with water. In the process of mechanical hole forming or underground excavation, the retaining mud is circulated and transported, and the pressure difference between the retaining mud and groundwater is used to control the water pressure, so that the retaining mud can form a mud skin on the hole wall to strengthen the hol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02
Inventor 贾兴文石从黎王平樊先平陈敬李俊萌唐茂华骆佳银
Owner CHONGQING CONSTR ENG NEW BUILDING MATERIALS
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