Alkali-free liquid concrete accelerator and preparation method and application of alkali-free liquid concrete accelerator

A concrete and quick-setting agent technology, applied in the field of quick-setting agent, can solve the problems of high alkalinity of the product, unsatisfactory sprayed concrete, and difficult concrete

Inactive Publication Date: 2017-12-15
WUJIAQU GEHUI CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The commonly used concrete quick-setting agent is a kind of gray powder product prepared from various components such as aluminum oxide, soda ash, thickener, etc. The powdery concrete quick-setting agent is not easy to mix with concrete evenly, and the current

Method used

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  • Alkali-free liquid concrete accelerator and preparation method and application of alkali-free liquid concrete accelerator
  • Alkali-free liquid concrete accelerator and preparation method and application of alkali-free liquid concrete accelerator
  • Alkali-free liquid concrete accelerator and preparation method and application of alkali-free liquid concrete accelerator

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preparation example Construction

[0034] The present invention provides the preparation method of alkali-free liquid concrete quick-setting agent described in above-mentioned scheme, comprises the following steps:

[0035] The aluminum salt, the inorganic nanometer material, the first fluorine-containing substance, the water reducing agent, the second fluorine-containing substance and water are mixed and then stirred for 2-8 hours to obtain the alkali-free liquid concrete quick-setting agent.

[0036] In the present invention, it is preferable to add the nanomaterial, the first fluorine-containing substance, the water reducing agent, and the second fluorine-containing substance into the water, and then add the aluminum salt after stirring evenly; There is no special requirement on the order of adding the agent and the second fluorine-containing substance, and any order of addition can be adopted.

[0037] In the present invention, after the above raw materials are mixed, they are stirred for 2-8 hours to obtai...

Embodiment 1

[0042] An alkali-free liquid concrete accelerator, comprising the following components in parts by mass: 50 parts of aluminum sulfate, 10 parts of acidic silica sol, 3 parts of sodium fluoride, 1 part of nonionic polyacrylamide, and 4 parts of magnesium fluorosilicate part, 32 parts of water;

[0043] Add water into the stainless steel reaction kettle according to the above ratio, then add acidic silica sol, sodium fluoride, non-ionic polyacrylamide and magnesium fluorosilicate to the water according to the above ratio, stir evenly, add aluminum sulfate, continue to stir for 5h, stir The rotation speed is 350r / min, and the stirring temperature is 25°C to obtain an alkali-free liquid concrete quick-setting agent.

Embodiment 2

[0045] An alkali-free liquid concrete quick-setting agent, comprising the following components in parts by mass: 50 parts of aluminum sulfate, neutral silica sol (SiO 2 The content is 30wt%, the particle size is 8nm) 10 parts, sodium fluoride 3 parts, non-ionic polyacrylamide 1 part, magnesium fluorosilicate 4 parts, water 32 parts;

[0046] Add water into the stainless steel reaction kettle according to the above ratio, then add acidic silica sol, sodium fluoride, non-ionic polyacrylamide and magnesium fluorosilicate to the water according to the above ratio, stir evenly, add aluminum sulfate, continue to stir for 8 hours, stir The rotation speed is 150r / min, and the stirring temperature is 10°C to obtain an alkali-free liquid concrete quick-setting agent.

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Abstract

The invention provides an alkali-free liquid concrete accelerator. The alkali-free liquid concrete accelerator comprises the following components by mass: 35-65 parts of aluminum salt, 3-25 parts of inorganic nano material, 0.5-15 parts of first fluorine substance, 0.5-5 parts of water reducer, 0.5-10 parts of second fluorine substance, and 20-50 parts of water; the first fluorine substance comprises one or a mixture of more of fluoride, fluosilicate and borofluoride; the second fluorine substance is fluosilicate. The provided alkali-free liquid concrete accelerator has a good fast hardening effect, the conservation rate of long-term strength of the concrete is high, and the alkali-free liquid concrete accelerator is suitable for spraying the concrete.

Description

technical field [0001] The invention relates to the technical field of quick-setting agents, in particular to an alkali-free liquid concrete quick-setting agent and its preparation method and application. Background technique [0002] Shotcrete is to use air or other power to spray cement, sand, stones and admixtures and other mixtures onto the sprayed surface with the help of spraying machinery, and condense into dense and uniform concrete in a short time. Shotcrete is generally used in coal mines. The special environment requires high durability and later strength of concrete. [0003] In order to make the sprayed concrete solidify quickly, it is necessary to add a concrete quick-setting agent to shorten the time required for the concrete to change from a slurry state to a solid state. The commonly used concrete quick-setting agent is a kind of gray powder product prepared from various components such as aluminum oxide, soda ash, thickener, etc. The powdery concrete quick...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B103/12
CPCC04B40/0039C04B2103/12C04B2111/00155C04B22/148C04B14/06C04B22/126C04B24/2652C04B22/002
Inventor 李书刚贺传卿罗伟邦郑旭华刘兵闫刚马俊杰张晓丽
Owner WUJIAQU GEHUI CHEM ENG
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