Alkali-free chlorine-free high-early-strength liquid accelerator and preparation method thereof
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A quick-setting agent and liquid technology, applied in the field of building materials, can solve the problem of large dust, achieve the effect of good adaptability of cement, improve product shelf life and reduce erosion
Inactive Publication Date: 2011-11-23
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +2
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However, it often cannot meet the requirements of the project for the early strength of concrete. I
Method used
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Embodiment 1
[0019] Add 49.3g Al 3 SO 4 18H 2 O, 18g MgSO 4 ·7H 2 O, 15g Al(OH) 3 , add 75g deionized water at the same time, stir and dissolve while heating, raise the temperature to 80±2℃, wait for Al 3 SO 4 18H 2 O, MgSO 4 ·7H 2 O, Al(OH) 3 After dissolving, add 10g of citric acid, 7g of triethanolamine and 1g of dodecylphenol polyoxyethylene ether, stir a small amount of defoamer at 80±2°C, cool and discharge to obtain a colorless and transparent solution. pH value 3.5, density 1.36g / cm 3 .
Embodiment 2
[0021] Add 49.3g Al 3 SO 4 18H 2 O, 18g MgSO 4 ·7H 2 O, 10gAl(OH) 3 Add 90g of deionized water at the same time, stir and dissolve while heating, raise the temperature to 80±2°C, wait for Al 3 SO 4 18H 2 O, MgSO 4 ·7H 2 O, Al(OH) 3 After dissolving, add 10g of citric acid, 7g of diethanolamine and 1g of dodecylphenol polyoxyethylene ether, stir evenly at 80±2°C with a small amount of defoamer, cool and discharge to obtain a colorless and transparent solution. pH value 4.0, density 1.36g / cm 3 .
Embodiment 3
[0023] Add 49.3g Al 3 SO 4 18H 2 O, 18g MgSO 4 ·7H 2 O, 5gAl(OH) 3 Add 90g of deionized water at the same time, stir and dissolve while heating, raise the temperature to 80±2°C, wait for Al 3 SO 4 18H 2 O, MgSO 4 ·7H 2 O, Al(OH) 3 After dissolving, add 8g of lactic acid, 7g of diethanolamine and 1.15g of glycerin, stir evenly at 80±2°C, cool and discharge to obtain a colorless and transparent solution. pH value 4.0, density 1.36g / cm 3 .
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Abstract
The invention discloses an alkali-free chlorine-free high-early-strength liquid accelerator and a preparation method thereof, and belongs to the technical field of building materials. The alkali-free chlorine-free high-early-strength liquid accelerator is synthesized by aluminum sulfate (a), alkaline earth metal salt (b), aluminum hydroxide (c), hydroxy carboxylic acid (d), an organic amine compound (e) and a stabilizing agent (f). The invention is characterized in that: the organic amine compound, a polyhydroxy organic matter and inorganic salt are subjected to complex reaction, and the molecular structure of the product is regulated by regulating a ratio of (a) to (b) to (c) to (d) to (e) to (f) so as to improve the performance of the product. Mortar doped with the product has the advantages of adjustable setting time, one-day compressive strength of over 20MPa and a 28-day compressive strength ratio of about 100 percent, the synthesis process is simple, reaction conditions are mild, and the alkali-free liquid accelerator has good performance.
Description
technical field [0001] The invention relates to an alkali-free, chlorine-free, high-early-strength liquid quick-setting agent for shotcrete and a preparation method thereof. Specifically, it is based on aluminum sulfate, alkaline earth metal salt, amorphous aluminum hydroxide, hydroxycarboxylic acid, alcohol amine, stabilizer The invention relates to a liquid alkali-free quick-setting agent prepared by a complexation reaction of the agent under certain conditions, and belongs to the technical field of building materials. Background technique [0002] Concrete admixture is an indispensable building material product in the process of engineering construction, and is called the fifth component of concrete. Accelerator for shotcrete is a very important product in concrete admixture. Shotcrete has great advantages in the slope support of tunnels, underground mines and projects with large inclinations, and has become a very important and necessary measure in the construction of t...
Claims
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IPC IPC(8): C04B24/32C04B24/12C04B24/26
CPCC04B28/00C04B24/2652
Inventor 马临涛鲁一晖陈改新纪国晋王少江孔祥芝计涛刘晨霞刘艳霞冯炜李曙光田军涛韩良满王荣鲁
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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