Alkali-free accelerator and preparation method thereof

A technology of accelerator and regulator, applied in the field of alkali-free accelerator and preparation, can solve the problems of poor stability, easy stratification, large amount of aluminum sulfate solution, etc., and achieve stable performance, high solubility and low material cost. Effect

Active Publication Date: 2021-07-16
厦门路桥翔通建材科技有限公司
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Problems solved by technology

Since aluminum sulfate, the main component of the quick-setting effect, has a solubility of 40.4g in water at a temperature of 30 degrees, the concentration of aluminum sulfate solution at room temperature is saturated when the dosage is relatively large. If the concentration is large, the stability is poor and it is easy to stratify

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  • Alkali-free accelerator and preparation method thereof
  • Alkali-free accelerator and preparation method thereof
  • Alkali-free accelerator and preparation method thereof

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[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] The quick-setting agent is an admixture that can be mixed into concrete to make it harden quickly. Its quick-setting mechanism is to accelerate the hydration of C3A and C3S, so as to achieve the hardening effect. There are mainly three types of liquid alkali-free accelerator systems on the market: fluoroaluminate system alkali-free accelerator, aluminum hydroxide suspension system alkali-free accelerator and sulphoaluminate system alkali-free accelerator .

[0032] However, this embodiment mainly studies the liquid alkali-free accelerator with a...

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Abstract

The invention provides an alkali-free accelerator and a preparation method thereof, and the alkali-free accelerator comprises the following materials in percentage by mass: 30-38% of water; 50%-65% of aluminum sulfate; 3%-3.3% of alcohol amine; 0.7%-0.9% of white carbon black; and 0.35%-0.45% of a pH regulator. The preparation method of the alkali-free accelerator comprises the following steps: step S10, placing the alkylol amine, the white carbon black and the distilled water into a flask, and uniformly stirring; s20, raising the temperature to 60-65 DEG C, and adding aluminum sulfate; s30, stopping heating, performing stirring for 4.5- 5.5 h, and forming a uniform emulsion; and S40, adding a pH regulator to regulate the pH value to 2-4, and standing to obtain the alkali-free accelerator. The alkali-free accelerator provided by the invention has the advantages of high solubility of aluminum sulfate, good rapid setting effect, low material cost, high cost performance and excellent and stable performance.

Description

technical field [0001] The invention relates to an alkali-free quick-setting agent and a preparation method thereof. Background technique [0002] Accelerator is an admixture applied to shotcrete, which can significantly shorten the setting and hardening time of concrete. Leakage plugging, ground concrete rapid construction and concrete emergency rescue projects. [0003] Accelerators are divided into liquid and solid according to the product form, and alkali-free and alkali-free according to the alkali content. Among them, the alkali-free liquid accelerator has the advantages of low alkali content, green environmental protection, and no dust pollution, which can effectively reduce the impact on the environment. Corrosion damage to construction personnel, and will not cause alkali-aggregate reaction problems, and has the advantages of high construction efficiency and high rebound strength. Therefore researching and preparing a kind of non-alkali liquid quick-setting agent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B24/122C04B22/02C04B24/06
Inventor 黄立敬严颖增
Owner 厦门路桥翔通建材科技有限公司
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