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Impervious high-strength alkali-free liquid accelerator and preparation method thereof

A high-strength, quick-setting agent technology, applied in the field of impervious high-strength alkali-free liquid quick-setting agent and its preparation, can solve the problems of poor stability, large drop in shotcrete strength, short storage period, etc., to reduce dust concentration and Resilience, avoiding no rust effect, no irritating smell effect

Active Publication Date: 2018-12-14
四川恒泽建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The widely used liquid quick-setting agent in China is aluminate-type quick-setting agent. Although this kind of quick-setting agent has improved the shortcomings of large dust in the construction process of dry shotcrete and insufficient dispersion of powdery quick-setting agent in the mixture, etc. , but there are also some problems: (1) The later strength of shotcrete decreases greatly
(2) poor stability, short storage period, prone to precipitation, inconvenient for long-term storage and long-distance transportation; (3) poor adaptability to cement
The high rebound rate causes too much concrete to fall, and the reuse rate of the fallen concrete is low, resulting in a lot of waste; the high dust concentration during the spraying operation not only affects the safety of the operation, but also pollutes the surrounding area of ​​the construction area The environment has adverse effects on the health of workers

Method used

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  • Impervious high-strength alkali-free liquid accelerator and preparation method thereof
  • Impervious high-strength alkali-free liquid accelerator and preparation method thereof

Examples

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preparation example Construction

[0028] The preparation method of described impervious high-strength type non-alkali liquid quick-setting agent, it comprises the following steps:

[0029] S1. Preparation of organic modifier: Add alcoholamine, hydroxypropyl methylcellulose and polyacrylamide in a weight ratio of 10:0.25:1 into a container filled with water under stirring, and heat to 40~ 50°C, continue to stir for 30-60 minutes, until the components are completely dissolved, so as to prepare the organic modifier;

[0030] S2. Add hydrated magnesium silicate and inorganic salts into a vessel filled with water while stirring, add aluminum sulfate to the vessel after they are completely dissolved, raise the temperature to 70-80°C, keep warm for 1-2 hours, and wait until the aluminum sulfate is completely dissolved Finally, add inorganic acid and continue to stir for 10-12 minutes to obtain a uniform and stable solution;

[0031] S3. Add the organic modifier prepared in step S1 into the vessel under stirring, kee...

Embodiment 1

[0033] The preparation method of impervious high-strength type non-alkali liquid quick-setting agent, it comprises the following steps:

[0034] S1. Preparation of organic modifier: Add 4 parts of diethanolamine, 0.1 part of hydroxypropyl methylcellulose and 0.4 part of polyacrylamide into a container containing 8 parts of water under stirring, and heat to 40-50 ℃, continue to stir for 30-60 minutes until all components are completely dissolved;

[0035] S2. Add 0.5 parts of hydrated magnesium silicate, 8 parts of sodium fluoride, and 1 part of magnesium fluorosilicate into the water containing 27.8 parts of utensils under stirring. After completely dissolving, add 50 parts of aluminum sulfate and heat up to 70-80 ℃, keep warm for 1-2 hours, add 0.2 parts of sulfuric acid after the aluminum sulfate is completely dissolved, and continue stirring for 10-12 minutes to obtain a uniform and stable solution;

[0036] S3. Add the modifying agent to the above solution under stirring ...

Embodiment 2

[0038] The preparation method of impervious high-strength type non-alkali liquid quick-setting agent, it comprises the following steps:

[0039] S1. Preparation of organic modifier: Add 4 parts of triethanolamine, 0.1 part of hydroxypropyl methylcellulose and 0.4 part of polyacrylamide into a container containing 8 parts of water under stirring, and heat to 40-50 ℃, continue to stir for 30-60 minutes until all components are completely dissolved;

[0040] S2. Add 0.6 parts of hydrated magnesium silicate and 10 parts of magnesium sulfate into a container containing 21.7 parts of water while stirring, add 55 parts of aluminum sulfate after completely dissolving, heat up to 70-80°C, keep warm for 1 hour, and wait for sulfuric acid After the aluminum is completely dissolved, add 0.2 parts of phosphoric acid and continue stirring for 10-12 minutes to obtain a uniform and stable solution;

[0041] S3. Add the modifying agent to the above solution under stirring state, keep it warm ...

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Abstract

The invention discloses an impervious high-strength alkali-free liquid accelerator. The impervious high-strength alkali-free liquid accelerator consists of the following components in percentage by weight: 40-60% of aluminum sulfate, 3-16% of an inorganic salt, 0.1-0.5% of an inorganic acid, 0.3-0.9% of a stabilizer, 3-8% of an organic modifier, and water. The invention further discloses a preparation method of the impervious high-strength alkali-free liquid accelerator. The beneficial effects are as the follows that a high rebound rate and a high dust concentration in a construction process are reduced, product performance stability is improved, good adaptability to different cement is achieved, the mixing amount is low, early strength is high, and later strength is basically not lost oreven increased.

Description

technical field [0001] The invention relates to an impervious high-strength alkali-free liquid quick-setting agent and a preparation method thereof. Background technique [0002] Accelerators are widely used today, and can be used for construction and leakage prevention and plugging of highways, railways, bridges, tunnels, mines, shafts, national defense, water conservancy, urban construction, spray anchor support, rapid construction of ground concrete and emergency concrete construction. Emergency rescue, reinforcement engineering, etc. The widely used liquid quick-setting agent in China is aluminate-type quick-setting agent. Although this kind of quick-setting agent has improved the shortcomings of large dust in the construction process of dry shotcrete and insufficient dispersion of powdery quick-setting agent in the mixture, etc. , but it also shows some problems: (1) The late strength of shotcrete decreases greatly. Excessive alkali content of the alkali-accelerating ...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B24/122C04B24/383C04B24/2652C04B22/08C04B22/124C04B22/126C04B22/141C04B22/142C04B22/165
Inventor 滕文生吴天淳王虎生贾维龙袁慧莉贾虎琛贺晓红
Owner 四川恒泽建材有限公司
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