Low-alkali setting accelerator, and preparation method and application thereof

A technology of quick-setting agent and stabilizer, which is applied in the field of low-alkali quick-setting agent and its preparation, can solve the problems of easy crystallization and freezing, poor low temperature performance, reduction of concrete strength, etc., and achieves fast setting and hardening of cement, low viscosity, convenient on-site construction effect

Pending Publication Date: 2020-09-15
SHANXI SUNWAY INTION TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the severe cold area in the north in winter, during the transportation and construction of the quick-setting agent, it is easy to crystallize and freeze, resulting in frozen blocks. These frozen blocks lose their function under the action of expansion str

Method used

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  • Low-alkali setting accelerator, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step 1. Mix aluminum sulfate I, sodium metaaluminate and water I to obtain solution I, and stir for 10 minutes;

[0046] Step 2. Add magnesium fluorosilicate and hydrofluoric acid to solution I in turn to obtain solution II, and stir for 20 minutes;

[0047] Step 3, mixing aluminum sulfate II, water II and solution II to obtain solution III, stirring for 20 minutes;

[0048] Step 4. Mix aluminum sulfate III, triethanolamine, hydroxymethyl cellulose (stabilizer), sericite (inorganic modified material, 50 nm in size) and solution III, and stir for 2 hours to obtain a low-alkali quick-setting agent.

[0049] Wherein, based on the total weight of the low-alkali quick-setting agent, the total amount of aluminum sulfate is 33% by weight, wherein the amount of aluminum sulfate I is 11% by weight, the amount of aluminum sulfate II is 11% by weight, and the amount of aluminum sulfate III is 11% by weight. The consumption is 11% by weight; the consumption of sodium metaaluminate...

Embodiment 2

[0051] According to the method of Example 1, the difference is that the sericite with a size of 50 nm is replaced with talcum powder with a size of 100 nm.

Embodiment 3

[0053] Step 1. Mix aluminum sulfate I, sodium metaaluminate and water I to obtain solution I, and stir for 10 minutes;

[0054] Step 2. Add magnesium fluorosilicate and hydrofluoric acid to solution I in turn to obtain solution II, and stir for 20 minutes;

[0055] Step 3, mixing aluminum sulfate II, water II and solution II to obtain solution III, stirring for 20 minutes;

[0056] Step 4. Mix aluminum sulfate III, triethanolamine, hydroxyethyl cellulose (stabilizer), sericite (inorganic modified material, 5 nm in size) and solution III, and stir for 2 hours to obtain a low-alkali quick-setting agent.

[0057] Wherein, based on the total weight of the low-alkali quick-setting agent, the total amount of aluminum sulfate is 40% by weight, wherein the amount of aluminum sulfate I is 12% by weight, the amount of aluminum sulfate II is 16% by weight, and the amount of aluminum sulfate III is 16% by weight. The consumption is 12% by weight; the consumption of sodium metaaluminate i...

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Abstract

The invention discloses a low-alkali setting accelerator and a preparation method thereof. The low-alkali setting accelerator is prepared from aluminum sulfate, sodium metaaluminate, magnesium fluosilicate, hydrofluoric acid, triethanolamine, a stabilizer, an inorganic modified material and water. The preparation method comprises the following steps: 1, mixing aluminum sulfate I, sodium metaaluminate and water I to obtain a solution I; 2, sequentially adding magnesium fluosilicate and hydrofluoric acid into the solution I to obtain a solution II; 3, mixing aluminum sulfate II, water II and thesolution II to obtain a solution III; and 4, mixing aluminum sulfate III, triethanolamine, a stabilizer, an inorganic modified material and the solution III. The low-alkali setting accelerator provided by the invention has good low-temperature stability, and still has short setting and hardening time and good strength at a low temperature.

Description

technical field [0001] The invention relates to a low-alkali accelerator and its preparation method and application. Background technique [0002] Accelerator is an indispensable additive in shotcrete construction, which can make concrete set and harden quickly, and reach a certain strength in a short time to meet engineering requirements. Most of the accelerators currently on the market are alkali accelerators with an alkali content ≥ 18% by weight, and low-alkali accelerators have an alkali content ≥ 6% by weight and less than 18% by weight, while alkali accelerators have an alkali content of ≥ 6% by weight and less than 18% by weight. It will have an impact on the environment and human health. To study non-alkali or low-alkali accelerators is to find new alkali metal materials that can replace them. Therefore, low-alkali or non-alkali accelerators will be recognized in the market and widely used. . In the severe cold area in the north in winter, during the transportatio...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B28/04C04B103/12
CPCC04B28/04C04B40/0039C04B2103/12C04B22/08C04B22/148C04B22/126C04B24/383C04B24/122C04B14/06
Inventor 李连震王宏维王英维
Owner SHANXI SUNWAY INTION TRADE CO LTD
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