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Highly-durable alkali-free liquid quick-setting agent preparation method

A durable and quick-setting agent technology, which is applied in the field of preparation of high-durability alkali-free liquid quick-setting agent, can solve the problems of poor impermeability of hardened concrete, unstable concrete quality, and large loss of strength in the later stage, so as to improve the strength of the later stage , Inhibit the generation of precipitation, improve the effect of early strength

Active Publication Date: 2018-06-19
FUJIAN KZJ NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid accelerators currently used in China have problems such as high alkali content, large strength loss in the later stage, and poor impermeability of hardened concrete.
High alkali content will cause serious environmental pollution, great harm to construction personnel, and unstable concrete quality. In order to improve the damage of accelerators to constructors and concrete quality, it is of great importance to develop a high-durability alkali-free liquid accelerator. significance

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Preparation of suspension stabilizer: acrylamide aqueous solution (acrylamide 100.00g, water 80.00g), methacrylic acid and acrylic acid aqueous solution (wherein methacrylic acid 20.00g, acrylic acid 12.00g and water 20.00g, ammonium persulfate Aqueous solution (including ammonium persulfate 1.20g, water 20.00g) and thioglycolic acid aqueous solution (including thioglycolic acid 0.70g, water 20.00g) were dropped into 160.00g water for reaction, the temperature was raised to 70°C for reaction, and the dropping time was 5.0h. After the addition is complete, add 0.50 g of dihydroxytartaric acid and keep it warm for 3.0 hours to obtain a suspension stabilizer;

[0023] (2) Preparation of modified alcohol amine: mix 100.00 g of diethanolamine and 40.00 g of dimethylol propionic acid evenly, heat up to 60°C, then add 3.00 g of p-toluenesulfonic acid, react for 2 hours, and obtain modified alcohol amine;

[0024] (3) prepare materials according to the following mass ratio:...

Embodiment 2

[0028] (1) Preparation of suspension stabilizer: acrylamide aqueous solution (acrylamide 100.00g, water 80.00g), methacrylic acid and acrylic acid aqueous solution (wherein methacrylic acid: 25.00g, acrylic acid 20.00g and water 20.00g, persulfuric acid Potassium aqueous solution (wherein potassium persulfate 1.80g, water 20.00g) and mercaptopropionic acid aqueous solution (wherein mercaptopropionic acid 0.90g, water 20.00g) drop into 130.00g water to carry out reaction, heat up to 60 ℃ reaction, dropwise time is 4.0 h, add 0.60g of potassium hydrogen tartrate after the dropwise addition, and keep warm for 2.0h to obtain a suspension stabilizer;

[0029] (2) Preparation of modified alcohol amine: mix 100.00 g of triethanolamine and 50.00 g of dimethylol butyric acid evenly, heat up to 70° C., then add 2.00 g of concentrated sulfuric acid, and react for 3 hours to obtain modified alcohol amine;

[0030] (3) prepare materials according to the following mass ratio:

[0031]

...

Embodiment 3

[0035] (1) Preparation of suspension stabilizer: acrylamide aqueous solution (acrylamide 100.00g, water 80.00g), fumaric acid and acrylic acid aqueous solution (wherein fumaric acid 10.00g, acrylic acid 40.00g and water 20.00g, ammonium persulfate Aqueous solution (including ammonium persulfate 1.80g, water 20.00g) and thioglycolic acid aqueous solution (including thioglycolic acid 1.00g, water 20.00g) were dropped into 130.00g water for reaction, the temperature was raised to 65°C for reaction, and the dropping time was 3.0h. After the addition is complete, add 1.00 g of sodium hydrogen tartrate and keep it warm for 1.0 h to obtain a suspension stabilizer;

[0036] (2) Preparation of modified alkanolamine: Mix 100.00g of monoethanolamine and 55.00g of dimethylol propionic acid evenly, heat up to 70°C, then add 4.00g of p-toluenesulfonic acid, and react for 1 hour to obtain modified alkanolamine;

[0037] (3) prepare materials according to the following mass ratio:

[0038] ...

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Abstract

The invention discloses a highly-durable alkali-free liquid quick-setting agent preparation method. According to the preparation method, a suspension stabilizer is prepared by copolymerizing acrylamide and an unsaturated acid, an alkali-free liquid quick-setting agent is synthesized by using the suspension stabilizer, and a polymer copolymer is introduced to optimize the quick-setting agent so asto improve the agglomeration property of the liquid setting agent, effectively inhibit the generation of the precipitate, substantially improve the mother liquor storage stability, and achieve the stability of more than one year; and the prepared highly-durable alkali-free liquid quick-setting agent does not contain sulfates, chlorine ions and alkalis so as to improve the durability of concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of a high-durability alkali-free liquid quick-setting agent. Background technique [0002] With the acceleration of large-scale mining, tunnel excavation, and road network and railway network construction, the amount of accelerators has greatly increased, and higher requirements have been placed on the performance and quality of accelerators. Traditional powder accelerator products can only be applied to dry spraying process construction, and there are defects such as slow dissolution rate and difficult dispersion evenly. [0003] At present, the development trend of accelerators for shotcrete is changing from traditional solid powder to liquid, and low-alkali and non-alkali are gradually replacing traditional accelerators. The liquid accelerators currently used in China have problems such as high alkali content, large strength loss in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B103/12
Inventor 郭鑫祺李祥河蒋卓君官梦芹陈晓彬林添兴麻秀星
Owner FUJIAN KZJ NEW MATERIALS CO LTD
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