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Alkali-free accelerating agent and preparation method and application thereof

A technology of quick-setting agent and formula, which is applied in the field of civil engineering and construction materials, can solve the problems of large quantities and storage stability that need to be further improved, and achieve the effects of reducing rebound, fast setting rate, and increasing cohesive force

Active Publication Date: 2019-12-31
GUANGZHOU KRYSTIC BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual use of this alkali-free accelerator, a large amount of incorporation is required to achieve a good coagulation effect, and the storage stability needs to be further improved

Method used

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  • Alkali-free accelerating agent and preparation method and application thereof
  • Alkali-free accelerating agent and preparation method and application thereof
  • Alkali-free accelerating agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment provides a non-alkali quick-setting agent, which includes the following components in parts by weight:

[0070]

[0071] The preparation method of described alkali-free quick-setting agent is as follows:

[0072] (1) Dissolve the aluminum sulfate, organic amine and catalyst A in the formula amount in water at 80°C, and stir at 70rpm for 100min to obtain the stock solution of alkali-free quick-setting agent;

[0073] (2) Add the catalyst B of the recipe amount into the stock solution of the alkali-free quick-setting agent, stir for 20 minutes, add the synergist of the recipe amount, stir for 20 minutes, add the stabilizer of the recipe amount, stir for 15 minutes, and obtain the alkali-free accelerator.

Embodiment 2

[0075] The difference from Example 1 is that aluminum dihydrogen phosphate is 6 parts by weight, and citric acid is 3 parts by weight.

Embodiment 3

[0077] The difference from Example 1 is that aluminum dihydrogen phosphate is 8 parts by weight, and citric acid is 1 part by weight.

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Abstract

The invention relates to an alkali-free accelerating agent and a preparation method and application thereof. The alkali-free accelerating agent comprises the following components in parts by weight: 30 to 65 parts of aluminum sulfate, 2 to 10 parts of organic amine, 3 to 10 parts of catalyst A, 1 to 3 parts of catalyst B, 3 to 6 parts of an auxiliary agent and 25 to 50 parts of water; the catalystA comprises a salt compound containing a phosphoric acid group and aluminum ions; and the catalyst B comprises a compound containing a carboxyl group and a hydroxyl group. Two different types of catalysts are introduced into an aluminum sulfate-organic amine reaction system, the two catalysts act synergistically, so that the complexation reaction of aluminum sulfate and organic amine is more complete, strong acids such as hydrofluoric acid and the like do not need to be added, the dosage of the alkali-free accelerating agent can be reduced, the faster solidification rate is ensured, the one-day strength is higher, and the product is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of civil engineering and construction materials, in particular to an alkali-free accelerator and its preparation method and application. Background technique [0002] The alkali-free accelerators on the market today are all based on the reaction of aluminum sulfate-organic amines. Through the complexation reaction between the two, aluminum ion complexes are formed to achieve rapid reaction with cement to make it coagulate. effect; it can be roughly divided into two types: one is to introduce suspending agent or dispersing agent on the basis of the reaction between aluminum sulfate and organic amine, so as to maintain the overall state of the alkali-free accelerator at a relative physical level. Under the stable suspension system, the non-alkali quick-setting agent can guarantee a certain storage capacity while having the performance required for construction. It cannot be stored for a long time; the second ...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B103/12
CPCC04B40/0039C04B2103/12C04B22/142C04B24/122C04B22/16C04B24/06C04B24/04
Inventor 雷斌陈廷光罗秋萍陈立勇王文波范志锋程建清叶俊宏焦志国刘学军杨杰杨光
Owner GUANGZHOU KRYSTIC BUILDING MATERIALS CO LTD
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