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Powder accelerator used for sprayed concrete and prepared from red mud and preparation method thereof

A technology of sprayed concrete and quick-setting agent, which is applied in the field of building materials, can solve the problems of insufficient utilization and occupation of red mud, achieve economic and environmental benefits of energy saving and emission reduction, reduce manufacturing costs, and achieve good stability

Inactive Publication Date: 2019-03-19
张江涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of red mud cannot be fully and effectively utilized. It can only be piled up in a large area, occupying a large amount of land, and has caused direct and indirect impacts on human production and life in many ways. Therefore, it is necessary to minimize the use of red mud It is imminent to realize multi-channel and large-quantity resource utilization

Method used

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  • Powder accelerator used for sprayed concrete and prepared from red mud and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] A powder quick-setting agent for shotcrete prepared from red mud

[0021] The powder accelerator is composed of 70% by mass of masterbatch and 30% of red mud, wherein the masterbatch is composed of 34% by mass of red mud, 26% of soda ash, 30% of gypsum and 10% of coal gangue.

[0022] A preparation method of powder quick-setting agent for shotcrete with red mud, comprising the following steps:

[0023] (1) Compatibility into masterbatch; according to mass percentage, 34% red mud, 26% soda ash, 30% gypsum and 10% coal gangue are compatible into masterbatch;

[0024] (2) Masterbatch treatment: The well-compatible masterbatch is ground and sieved through a 300-mesh sieve, and the sieve residue is <12%;

[0025] (3) Preparation of quick-setting agent: Prepare red mud with a water content lower than 1.3%, and mix 70% of masterbatch and 30% of red mud according to mass percentage to obtain powder quick-setting agent. Among them, the prepared powder accelerator has an initia...

Embodiment 2

[0027] A powder quick-setting agent for shotcrete prepared from red mud

[0028] The powder accelerator is composed of 67% by mass of masterbatch and 33% of red mud, wherein the masterbatch is composed of 29% by mass of red mud, 25% of soda ash, 34% of gypsum and 12% of coal gangue.

[0029] A preparation method of powder quick-setting agent for shotcrete with red mud, comprising the following steps:

[0030] (1) Compatibility into a masterbatch; according to the mass percentage, 29% of red mud, 25% of soda ash, 34% of gypsum and 12% of coal gangue are compatible into a masterbatch;

[0031] (2) Masterbatch treatment: The well-compatible masterbatch is ground and sieved through a 300-mesh sieve, and the sieve residue is <12%;

[0032] (3) Preparation of quick-setting agent: Prepare red mud with a water content of less than 1.3%, and fully mix 67% of masterbatch and 33% of red mud according to the mass percentage to obtain a powder quick-setting agent. Among them, the prepare...

Embodiment 3

[0034] A powder quick-setting agent for shotcrete prepared from red mud

[0035] The powder accelerator is composed of 65% by mass of masterbatch and 35% of red mud, wherein the masterbatch is composed of 26% by mass of red mud, 24% of soda ash, 35% of gypsum and 15% of coal gangue.

[0036] A preparation method of powder quick-setting agent for shotcrete with red mud, comprising the following steps:

[0037] (1) Compatibility into masterbatch; according to the mass percentage, 26% of red mud, 24% of soda ash, 35% of gypsum and 15% of coal gangue are compatible into masterbatch;

[0038] (2) Masterbatch treatment: The well-compatible masterbatch is ground and sieved through a 300-mesh sieve, and the sieve residue is <12%;

[0039] (3) Preparation of quick-setting agent: Prepare red mud with a water content of less than 1.3%, and fully mix 65% of masterbatch and 35% of red mud according to the mass percentage to obtain a powder quick-setting agent. Among them, the prepared po...

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Abstract

The invention relates to the technical field of building material, and particularly relates to a powder accelerator used for sprayed concrete and prepared from red mud and a preparation method thereof. The powder accelerator is prepared from master batch and red mud in mass percentage; the preparation method comprises the following steps: blending 24-35% of red mud, 22-26% of sodium carbonate, 30-35% of gypsum and 10-15% of coal gangue into the master batch according to mass percentage: sieving the blended master batch with a 300-mesh screen after being levigated, with the weight of screen residue being less than 12%; preparing red mud with water content lower than 1.3%, and sufficiently mixing 65-77% of the master batch and 23-35% of the red mud according to mass percentage to obtain thepowder accelerator. Compared with existing preparation method of the powder accelerator used for sprayed concrete, the method greatly reduces the use amount of mineral product materials in the production process of the powder accelerator, reduces the preparation cost, saves resources, and is favorable for energy conservation and emission reduction and improvement of economical and social benefits;the prepared powder accelerator used for sprayed concrete is good in stability, low in disability and high in compressive strength.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a powder accelerator for shotcrete prepared from red mud and a preparation method thereof. Background technique [0002] Accelerator is a commonly used additive in shotcrete. It can make cement and other gel materials achieve initial setting and hardening in a relatively short period of time, and then achieve final setting. The setting time and hardening speed shown in the process are short. The fast and stable strength increase well meet the requirements of the construction process for special processes, and it is precisely because of these excellent properties that the shotcrete technology can be further expanded. Existing accelerators can be divided into powder accelerators and liquid accelerators according to their physical state, and can be further divided into high-alkali, low-alkali and alkali-free accelerators based on their different alkali contents. The sett...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14C04B103/12
CPCC04B40/0042C04B2103/12C04B18/0409C04B18/12C04B22/10C04B22/143
Inventor 张江涛
Owner 张江涛
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