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Enhanced alkali-free setting accelerator as well as preparation method and application thereof

An accelerator and enhanced technology, which is applied in the field of enhanced non-alkali accelerator and its preparation, can solve the problems of restricting the popularization and application of alkali-free accelerator, poor cement adaptability, and poor stability, so as to avoid the increase of void ratio , Improve the strength and accelerate the hardening rate

Inactive Publication Date: 2021-02-19
安徽成弘建新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems such as poor stability, high cost, high dosage, and poor cement adaptability limit the popularization and application of alkali-free accelerators.

Method used

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  • Enhanced alkali-free setting accelerator as well as preparation method and application thereof

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Embodiment 1

[0024] An enhanced alkali-free quick-setting agent and a preparation method thereof, the raw materials of which are composed of: 24% ionic ammonia aluminum complex solution, 23% aluminum sulfate, 8% stabilizer, 15% enhancer, 1% thickener, Surplus is water, total amount 100%; Said percentage is mass percent;

[0025] The preparation process of the ionic ammonia-aluminum complex solution is as follows: Pour the calculated and weighed pure water with a mass percentage of 65% into a three-necked flask, gradually heat up to 70-80 degrees Celsius in a water bath, and then add a mass percentage of 25% nitric acid Two-thirds of the aluminum was added into the three-necked flask and stirred for 20 minutes to obtain a substantially clear solution. Then slowly add diethanol monoisopropanolamine with a mass percentage of 10% to the system, keep stirring for 20 minutes, then slowly add the remaining aluminum nitrate into the three-necked flask and stir until the solution is clear and trans...

Embodiment 2

[0028] An enhanced alkali-free quick-setting agent and a preparation method thereof, the raw materials of which are composed of: 24% ionic ammonia-aluminum complex solution, 28% aluminum sulfate, 8% stabilizer, 17% enhancer, 3% thickener, Surplus is water, total amount 100%; Said percentage is mass percent;

[0029] The preparation process of the ionic ammonia-aluminum complex solution is as follows: Pour the calculated and weighed pure water with a mass percentage of 65% into a three-necked flask, gradually heat up to 70-80 degrees Celsius in a water bath, and then add a mass percentage of 25% nitric acid Two-thirds of the aluminum was added into the three-necked flask and stirred for 20 minutes to obtain a substantially clear solution. Then slowly add diethanol monoisopropanolamine with a mass percentage of 10% to the system, keep stirring for 20 minutes, then slowly add the remaining aluminum nitrate into the three-necked flask and stir until the solution is clear and trans...

Embodiment 3

[0032] An enhanced alkali-free quick-setting agent and a preparation method thereof. The raw materials are as follows: 22% ionic ammonia-aluminum complex solution, 25% aluminum sulfate, 7% stabilizer, 15% enhancer, 1% thickener, Surplus is water, total amount 100%; Said percentage is mass percent;

[0033] The preparation process of the ionic ammonia-aluminum complex solution is as follows: Pour the calculated and weighed pure water with a mass percentage of 65% into a three-necked flask, gradually heat up to 70-80 degrees Celsius in a water bath, and then add a mass percentage of 25% nitric acid Two-thirds of the aluminum was added into the three-necked flask and stirred for 20 minutes to obtain a substantially clear solution. Then slowly add diethanol monoisopropanolamine with a mass percentage of 10% to the system, keep stirring for 20 minutes, then slowly add the remaining aluminum nitrate into the three-necked flask and stir until the solution is clear and transparent to ...

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Abstract

The invention discloses an enhanced alkali-free setting accelerator as well as a preparation method and application thereof. The enhanced alkali-free setting accelerator is prepared from the followingcomponents: 17-24% of an ionic ammonium-aluminum complex solution, 23-28% of aluminum sulfate, 5-8% of a stabilizer, 12-17% of an enhancer, 1-3% of a thickener and the balance of water, totaling 100%, wherein the percentages are mass percentages. The preparation method comprises the following steps: complexing aluminum ions in aluminum nitrate with diethanolisopropanolamine serving as a matrix toform a stable complex; and adding aluminum sulfate, a stabilizer, an enhancer and a thickener into the aluminum-containing complex. The complex is formed by aluminum ions and diethanolisopropanolamine, so that the stability of the alkali-free setting accelerator can be improved, and the setting acceleration efficiency and the adaptability to various types of cement can be improved. By adding thestabilizer, supersaturated aluminum ions in the alkali-free setting accelerator can be prevented from being crystallized and separated out, and certain help is provided for cement coagulation promotion and early strength of cement paste. The enhancer is added, so that the early and later strength of the cement can be improved, and a coagulation promoting effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of cement accelerator utilization, and in particular relates to an enhanced alkali-free accelerator and its preparation method and application. Background technique [0002] Shotcrete is a new type of concrete construction technology. The main method is to mix cementitious materials, aggregates such as sand and gravel, mixing water and a certain amount of chemical admixture in advance, and then put the concrete into the sprayer. Concrete is delivered to the nozzle of the injection machine by using high-compression air, and then mixed with the accelerator at the nozzle, and then sprayed to the surface of the rock wall or other supporting structures at a relatively high injection speed. The main purpose of this material is to strengthen the surface of the building structure, repair the surface concave layer and cracks caused by mechanical construction, etc. At present, a large number of applications are often...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/12
CPCC04B40/0039C04B2103/12C04B22/085C04B24/122C04B22/148C04B24/124C04B24/383
Inventor 李晓静谢昊刘国华孙波
Owner 安徽成弘建新材料有限公司
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