A kind of concrete admixture and its preparation method and application method

A technology of concrete admixture and defoamer, which is applied in the field of concrete admixture, can solve problems such as failure to meet engineering requirements, serious strength loss, and hidden dangers of engineering quality stability, so as to speed up condensation, increase early strength, and reduce losses Effect

Active Publication Date: 2021-08-10
HANGZHOU LIPING IND & TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The green non-alkali liquid quick-setting agent prepared by the invention can reduce the corrosion of the quick-setting agent to the materials in the concrete, but the concrete using this quick-setting agent has a serious loss of strength in the later stage of use, which is far from meeting the engineering requirements and has a great impact on the quality of the project. There is a great hidden danger in the stability of concrete, therefore, it is a problem to be solved to develop an admixture that makes concrete set quickly and has a high later strength preservation rate.

Method used

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  • A kind of concrete admixture and its preparation method and application method
  • A kind of concrete admixture and its preparation method and application method
  • A kind of concrete admixture and its preparation method and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: a kind of preparation method of concrete admixture comprises the following steps:

[0042] S1, according to the proportioning in table 1, 30kg aluminum sulfate is sieved and pulverized, crosses 80 mesh sieves;

[0043] S2. Heat 30kg of water to 55°C, add aluminum sulfate into the water, and keep stirring until the aluminum sulfate is completely dissolved;

[0044] S3, add 5kg potassium metaaluminate and 2kg aluminum fluorosilicate, stir constantly, stir for 30min;

[0045] S4. Slowly add 2kg of alcohol amine, and stir at 25°C for 10 minutes, add 0.2kg of organic acid, and raise the temperature to 55°C, keep the temperature for 30 minutes, the alcohol amine is triethanolamine, and the organic acid is benzoic acid;

[0046] S5. Add 5kg of calcium formate and 3kg of magnesium silicate, heat up to 60°C, and stir for 10min;

[0047] S6. Add 1 kg of glycerin, 0.3 kg of defoamer and 0.5 kg of ester plasticizer, and stir evenly to obtain a concrete admixture. Th...

Embodiment 2

[0050] Embodiment 2: a kind of preparation method of concrete admixture comprises the following steps:

[0051] S1, according to the proportioning in table 1, 35kg aluminum sulfate is sieved and pulverized, crosses 100 mesh sieves;

[0052] S2. Heat 35kg of water to 65°C, add aluminum sulfate into the water, and keep stirring until the aluminum sulfate is completely dissolved;

[0053] S3, add 6kg potassium metaaluminate and 3kg aluminum fluorosilicate, stir continuously, stir for 35min;

[0054] S4. Slowly add 4kg of alcohol amine, and stir at 28°C for 15 minutes, add 0.4kg of organic acid, and raise the temperature to 65°C, keep the temperature for 45 minutes, the alcohol amine is diethanolamine, and the organic acid is citric acid;

[0055] S5. Add 6kg calcium formate and 4kg magnesium silicate, heat up to 70°C, and stir for 15min;

[0056] S6. Add 2 kg of glycerin, 0.4 kg of defoamer and 0.6 kg of ester plasticizer, and stir evenly to obtain a concrete admixture. The def...

Embodiment 3

[0057] Embodiment 3: a kind of preparation method of concrete admixture comprises the following steps:

[0058] S1, according to the proportioning in table 1, sieve and pulverize 40kg aluminum sulfate, cross 150 mesh sieves;

[0059] S2. Heat 40kg of water to 75°C, add aluminum sulfate into the water, and keep stirring until the aluminum sulfate is completely dissolved;

[0060] S3, add 7kg potassium metaaluminate and 4kg aluminum fluorosilicate, stir constantly, stir 40min;

[0061] S4. Slowly add 6kg of alcohol amine, and stir at 30°C for 20 minutes, add 0.5kg of organic acid, and raise the temperature to 75°C, keep the temperature for 60 minutes, the alcohol amine is diethanolamine, and the organic acid is acetic acid;

[0062] S5. Add 7kg of calcium formate and 5kg of magnesium silicate, heat up to 80°C, and stir for 20min;

[0063] S6. Add 3 kg of glycerin, 0.6 kg of defoamer and 0.7 kg of ester plasticizer, and stir evenly to obtain a concrete admixture. The defoamer i...

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Abstract

The invention discloses a concrete admixture, a preparation method and an application method thereof. The concrete admixture comprises the following components by weight: 30-50 parts of aluminum sulfate, 5-10 parts of potassium metaaluminate, 3-8 parts of magnesium silicate, 1-5 parts of glycerin, 2-5 parts of aluminum fluorosilicate, 5-10 parts of calcium formate, 0.3-0.8 parts of defoamer, 0.2-0.9 parts of organic acid, 2-10 parts of alcohol amine, 0.5-1 part of ester plasticizer, 30-50 parts of water. The dosage of the concrete admixture of the present invention is 3-5% of the cement mass. The application method of the concrete admixture of the present invention: the concrete admixture and the concrete surface enhancer are mixed according to the mass ratio of 1:2-3 and then added to the sprayed concrete at the nozzle, and the amount of the concrete admixture is calculated as 3 based on the cement weight. -5%. The concrete admixture of the invention has the advantages of no alkali metal ion, no corrosion, fast setting speed of concrete, and little strength loss in the later stage.

Description

technical field [0001] The invention relates to the technical field of concrete admixture, more specifically, it relates to a concrete admixture and its preparation method and application method. Background technique [0002] Concrete admixture refers to the substance that is added to improve the performance of concrete in the process of mixing concrete. The amount of concrete admixture is generally not more than 5% of the cement mass, and the quick-setting agent is an indispensable addition in construction engineering. agent. [0003] Accelerator is a chemical admixture that can make cement or concrete set quickly, sometimes also called accelerator. At present, accelerators have been widely used in shotcrete construction of tunnels, urban construction, water conservancy and electric power culverts, water diversion tunnels and other underground projects, self-waterproof shotcrete support, leak prevention, plugging construction, rapid construction of ground concrete and emer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B24/26C04B24/32
CPCC04B40/0039C04B22/148C04B22/08C04B22/00C04B24/026C04B22/126C04B24/04C04B24/122C04B24/045C04B24/42C04B24/26C04B24/32
Inventor 陈礼平
Owner HANGZHOU LIPING IND & TRADE CO LTD
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