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Alkali-free liquid accelerator, and preparation method and application method thereof

A technology of liquid quick-setting agent and dispersant, which is applied in the field of alkali-free liquid quick-setting agent and its preparation. It can solve the problems of excessive dust, large dosage, and large rebound, so as to reduce the dosage and avoid alkali-aggregate Response, rapid growth effect

Inactive Publication Date: 2016-11-09
SHANDONG YUANLIHUA MINING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of alkali-aggregate reaction, large dosage, high dust and large rebound caused by the alkalinity of the existing quick-setting agent, and provide a non-alkali liquid quick-setting agent and its preparation method and application method , the pH of the quick-setting agent is about 7, the dosage is small, and the performance is superior

Method used

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  • Alkali-free liquid accelerator, and preparation method and application method thereof

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Effect test

Embodiment 1

[0039] An alkali-free liquid quick-setting agent is configured according to weight percentage by the following components:

[0040] Aluminum sulfate: 50%;

[0041] Aluminum hydroxide: 6%;

[0042] Diethanolamine: 3%;

[0043] Polyethylene glycol 200: 0.8%;

[0044] Stabilizer: 0.3%;

[0045] Water: 39.9%.

[0046] The preparation method is as follows:

[0047] Dissolve aluminum sulfate in water first, then heat to 80°C, add aluminum hydroxide and keep stirring, stop heating when the above two components are nearly dissolved, and cool to room temperature, then add diethanolamine, polyethylene glycol in sequence Alcohol 200, stabilizer, stirring continuously until a transparent, uniform and stable liquid is formed, which is the high-efficiency alkali-free liquid accelerator.

[0048] During application, the alkali-free liquid quick-setting agent is added to the sprayed cement composition at the nozzle to prepare sprayed concrete, and the dosage is 2.0% of the cement weight...

Embodiment 2

[0050] An alkali-free liquid quick-setting agent is configured according to weight percentage by the following components:

[0051] Aluminum sulfate: 38%;

[0052] Aluminum hydroxide: 8%;

[0053] Triisopropanolamine: 4%;

[0054] Polyethylene glycol 200: 0.9%;

[0055] Stabilizer: 0.4%;

[0056] Water: 48.7%.

[0057] The preparation method is as follows:

[0058] Dissolve aluminum sulfate in water first, then heat to 80°C, add aluminum hydroxide and keep stirring, stop heating when the above two components are nearly dissolved, and cool to room temperature, then add triisopropanolamine, Polyethylene glycol 200, stabilizer, stirring continuously until a transparent, uniform and stable liquid is formed, which is the high-efficiency alkali-free liquid accelerator.

[0059] During application, the alkali-free liquid quick-setting agent is added into the sprayed cement composition at the nozzle to prepare shotcrete, and the dosage is 3.0% of the cement weight in the concrete....

Embodiment 3

[0061] An alkali-free liquid quick-setting agent is configured according to weight percentage by the following components:

[0062] Aluminum sulfate: 55%;

[0063] Aluminum hydroxide: 4%;

[0064] Diethanolamine: 2%;

[0065] Triethanolamine: 1%;

[0066] Polyethylene glycol 400: 0.5%;

[0067] Stabilizer: 0.1%;

[0068] Water: 37.4%.

[0069] The preparation method is as follows:

[0070] Dissolve aluminum sulfate in water first, then heat to 80°C, add aluminum hydroxide and keep stirring, stop heating when the above two components are nearly dissolved, and cool to room temperature, then add diethanolamine, triethanolamine, Polyethylene glycol 400, stabilizer, stirring continuously until a transparent, uniform and stable liquid is formed, which is the high-efficiency alkali-free liquid accelerator.

[0071] During application, the alkali-free liquid quick-setting agent is added into the sprayed cement composition at the nozzle to prepare shotcrete, and the dosage is 4....

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Abstract

The invention discloses an alkali-free liquid accelerator, and a preparation method and an application thereof. The alkali-free liquid accelerator is prepared from, by weight, 35-60% of aluminum sulfate, 2-8% of aluminum hydroxide, 1-5% of alcohol amine, 0.5-1% of a dispersant, 0.1-0.5% of a stabilizer, and the balance of water. The accelerator is neutral, effectively avoids later alkali-aggregate reactions and avoids hidden safety troubles; the accelerator has low admixture and superior performances, and is far better than first-grade accelerators in initial setting time, final setting time and later strength; and the accelerator has the advantages of small rebounding amount, low dust concentration, provision of safe and healthy operating environment for construction personnel, engineering cost reduction, construction progress acceleration and good economic and social benefits in the concrete jet construction process.

Description

technical field [0001] The invention relates to the field of shotcrete construction in underground engineering, in particular to an alkali-free liquid quick-setting agent and a preparation method and an application method thereof. Background technique [0002] As a support method, shotcrete is more and more widely used in underground engineering construction. As an important additive in shotcrete, its research is receiving more and more attention, but the speed-setting agent on the market Coagulants have major disadvantages. [0003] At present, shotcrete accelerators include powder accelerators and liquid accelerators. The disadvantages are as follows: [0004] (1) The quick-setting agent is alkaline. After being mixed into shotcrete, an alkali-aggregate reaction will occur in the later stage to form an alkali-silicic acid gel. After absorbing water, a large volume expansion will occur, resulting in concrete swelling and cracking; [0005] (2) Both the powder accelerator ...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/06C04B24/122C04B24/32C04B24/04C04B28/04
Inventor 李树忱宋庆华石伟宋玉庆
Owner SHANDONG YUANLIHUA MINING EQUIP
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