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Preparation method for environmentally-friendly alkali-free liquid accelerator

An environmentally friendly, quick-setting agent technology, applied in the field of building materials, can solve the problems of poor impermeability of hardened concrete, unstable concrete quality, and serious injuries to construction personnel, so as to improve the strength of the later stage, inhibit the generation of precipitation, and improve the conversion rate. Effect

Active Publication Date: 2018-06-01
KZJ NEW MATERIALS GROUP 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 significance to develop an environmentally friendly alkali-free liquid accelerator.

Method used

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  • Preparation method for environmentally-friendly alkali-free liquid accelerator
  • Preparation method for environmentally-friendly alkali-free liquid accelerator
  • Preparation method for environmentally-friendly alkali-free liquid accelerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of suspension stabilizer: acrylamide aqueous solution (acrylamide 100.00g, water 80.00g), maleic anhydride and acrylic acid aqueous solution (wherein maleic anhydride 22.00g, acrylic acid 13.00g and water 20.00g, ammonium persulfate Aqueous solution (ammonium persulfate 1.20g, water 20.00g) and thioglycolic acid aqueous solution (thioglycolic acid 0.90g, 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 45.00 g of dimethylol propionic acid evenly, heat up to 65°C, then add 2.00 g of p-toluenesulfonic acid, and react for 2 hours to obtain modified alcohol amine;

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

[0025]

[0...

Embodiment 2

[0028] (1) Preparation of suspension stabilizer: acrylamide aqueous solution (acrylamide 100.00g, water 80.00g), methacrylic acid and maleic anhydride aqueous solution (wherein methacrylic acid 32.00g, maleic anhydride 20.00g and water 20.00g , Potassium persulfate aqueous solution (wherein potassium persulfate 1.80g, water 20.00g) and thioglycolic acid aqueous solution (wherein thioglycolic acid 0.80g, water 20.00g) drop into 130.00g water and react, be heated up to 60 ℃ of reaction, dropwise time is 4.0h, 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 40.00 g of dimethylol butyric acid evenly, heat up to 70° C., then add 2.50 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]

[0032]

...

Embodiment 3

[0035] (1) Preparation of suspension stabilizer: acrylamide aqueous solution (acrylamide 100.00g, water 80.00g), fumaric acid and methacrylic acid aqueous solution (wherein fumaric acid 18.00g, methacrylic acid 40.00g and water 20.00g , ammonium persulfate aqueous solution (wherein ammonium persulfate 1.80g, water 20.00g) and thioglycolic acid aqueous solution (wherein thioglycolic acid 1.00g, water 20.00g) are dripped into 130.00g water to react, be heated up to 65 ℃ of reaction, dropwise time is 3.0h, after the dropwise addition, add 1.00g of sodium hydrogen tartrate, keep warm for 1.0h to obtain a suspension stabilizer;

[0036] (2) Preparation of modified alcohol amine: Mix 100.00 g of monoethanolamine and 50.00 g of dimethylol propionic acid evenly, heat up to 70°C, then add 4.00 g of p-toluenesulfonic acid, and react for 1 hour to obtain modified alcohol amine;

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

[0038]

[0039] Add 1.20g of the ab...

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Abstract

The invention discloses a preparation method for an environmentally-friendly alkali-free liquid accelerator. The preparation method is characterized in that acrylamide and unsaturated acid are subjected to copolymerization to prepare suspension stabilizer, then, the suspension stabilizer is used for preparing the synthesis of the alkali-free liquid accelerator, macromolecule copolymer is introduced to optimize the accelerator, the coherence of the liquid accelerator is improved, sediments can be effectively inhibited, mother liquor storage stability is greatly improved, and stability performance can be improved by one year or more. The environmentally-friendly alkali-free liquid accelerator prepared with the preparation method does not corrode the skin of a construction worker, the production environment is not polluted, and the environmentally-friendly alkali-free liquid accelerator belongs to an environmentally-friendly pollution-free product.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of an environment-friendly 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 l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C08F220/56C08F222/02C08F220/06C08F222/06C04B103/12
Inventor 郭鑫祺李祥河蒋卓君官梦芹陈晓彬林添兴麻秀星
Owner KZJ NEW MATERIALS GROUP CO LTD
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