A kind of alkali-free quick-setting agent and its preparation method and application
A technology of quick-setting agent and formula, applied in the field of civil construction materials, can solve the problems of large amount and the storage stability needs to be further improved, and achieve the effects of good strength, fast setting rate, and product safety and reliability.
Active Publication Date: 2021-05-14
GUANGZHOU KRYSTIC BUILDING MATERIALS CO LTD
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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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Examples
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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 present invention relates to an alkali-free quick-setting agent and its preparation method and application. The alkali-free quick-setting agent comprises the following components in parts by weight: 30-65 parts by weight of aluminum sulfate, 2-10 parts by weight of organic amine, 3 ‑10 parts by weight of catalyst A, 1‑3 parts by weight of catalyst B, 3‑6 parts by weight of auxiliary agent, 25‑50 parts by weight of water; the catalyst A includes salt compounds containing phosphoric acid groups and aluminum ions; the catalyst B includes compounds containing carboxyl and hydroxyl groups. The present invention introduces two different types of catalysts into the aluminum sulfate-organic amine reaction system, and these two catalysts act synergistically to make the complexation reaction between aluminum sulfate and organic amine more complete without adding strong acids such as hydrofluoric acid. While reducing the amount of non-alkali accelerator, it ensures a faster setting rate, and has a higher one-day strength, 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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IPC IPC(8): C04B24/12C04B103/12
CPCC04B40/0039C04B2103/12C04B22/142C04B24/122C04B22/16C04B24/06C04B24/04
Inventor 雷斌范志锋陈廷光陈立勇王文波
Owner GUANGZHOU KRYSTIC BUILDING MATERIALS CO LTD