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A kind of preparation method of high durability non-alkali liquid quick-setting agent

A technology of durability and quick-setting agent, 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, large loss of strength in the later period, etc., so as to improve the strength of the later period. , The effect of inhibiting the formation of precipitation and improving the early strength

Active Publication Date: 2019-09-06
FUJIAN KZJ NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of preparation method of high durability non-alkali liquid quick-setting agent
  • A kind of preparation method of high durability non-alkali liquid quick-setting agent
  • A kind of preparation method of high durability non-alkali liquid quick-setting agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0023] (2) Preparation of modified alcohol amine: 100.00 g of diethanolamine and 40.00 g of dimethylolpropionic acid were mixed uniformly, the temperature was raised to 60°C, 3.00 g of p-toluenesulfonic acid was added, and the reaction was carried out for 2 h to obtain modified alcohol amine;

[0024] (...

Embodiment 2

[0028] (1) Preparation of suspension stabilizer: acrylamide aqueous solution (100.00 g of acrylamide, 80.00 g of water), methacrylic acid and acrylic acid aqueous solution (among which methacrylic acid: 25.00 g, acrylic acid 20.00 g and water 20.00 g, persulfuric acid: 25.00 g, 20.00 g of acrylic acid and 20.00 g of water) Potassium aqueous solution (wherein potassium persulfate 1.80g, water 20.00g) and mercaptopropionic acid aqueous solution (wherein mercaptopropionic acid 0.90g, water 20.00g) were dropped into 130.00g water to react, and the temperature was raised to 60 ° C for reaction, and the addition time was 4.0 h, add 0.60g potassium hydrogen tartrate after the dropwise addition, and keep the temperature 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 uniformly, heat up to 70° C., then add 2.00 g of concentrated sulfuric acid, and react for 3 hours to o...

Embodiment 3

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

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

[0037] (3) Prepare materials according to the following mass...

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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 accelerator. Background technique [0002] With the acceleration of large-scale mining, tunnel excavation and construction of highway and railway network projects, 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 used in dry spraying process construction, and there are defects such as slow dissolution speed and difficult to disperse evenly. [0003] At present, the development trend of accelerators for shotcrete is changing from traditional solid powder to liquid, and low-alkali and alkali-free are gradually replacing traditional accelerators. The liquid accelerators currently used in China have problems such as high alkali content, large late strength loss...

Claims

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Application Information

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Patent Type & Authority Patents(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