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Liquid alkali-free setting accelerator and preparation method thereof

A technology of quick-setting agent and liquid, which is applied in the field of building materials and can solve the problems of large rebound, poor stability, and large dosage

Active Publication Date: 2019-08-02
陕西天福盛源新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The current non-alkali liquid quick-setting agent still has some disadvantages: large dosage, poor stability, low strength in the later stage, large rebound, and adaptability to cement, etc.

Method used

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  • Liquid alkali-free setting accelerator and preparation method thereof
  • Liquid alkali-free setting accelerator and preparation method thereof
  • Liquid alkali-free setting accelerator and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] (1) At room temperature, 40% polyaluminum sulfate (Al 2 o 3 content of 10%) was dissolved in water, then 10% EDTA was added, stirred evenly, and reacted at 30-60°C for 1-2 hours to obtain a complex;

[0047] (2) Add 1% Al-MOF (pore volume is 1.39cm 3 / g, the specific surface area is 2757m 2 / g, the skeleton density is 0.45g / cm 3 ) stirred evenly, ultrasonic treatment for 15 minutes, to obtain a highly dispersed complex;

[0048] (3) under normal temperature, 3% bisphenol A epoxy vinyl ester resin and 1% bisphenol A epoxy resin (epoxy value 0.35) are dissolved in water, stir evenly, obtain organic tackifier;

[0049] (4) Add 5% aluminum hydroxide gel, 5% triethanolamine, 5% phosphoric acid and 0.5% sodium dodecylbenzenesulfonate into the highly dispersed complex, stir at 40-60°C for 30 minutes, and then Add an organic tackifier, 1% styrene, 0.2% di-tert-butyl peroxide, and 0.1% ethylenediamine, and react at 50-70°C for 1-3 hours to obtain a liquid alkali-free quick-...

Embodiment 2

[0051] (1) At room temperature, 40% polyaluminum sulfate (Al 2 o 3 content of 12%) was dissolved in water, then 10% EDTA was added, stirred evenly, and reacted at 30-60°C for 1-2 hours to obtain a complex;

[0052] (2) Add 1% Al-MOF (pore volume is 1.39cm 3 / g, the specific surface area is 2757m 2 / g, the skeleton density is 0.45g / cm 3 ) stirred evenly, ultrasonic treatment for 15 minutes, to obtain a highly dispersed complex;

[0053] (3) under normal temperature, 3% bisphenol A epoxy vinyl ester resin and 1% bisphenol A epoxy resin (epoxy value 0.35) are dissolved in water, stir evenly, obtain organic tackifier;

[0054] (4) Add 5% aluminum hydroxide gel, 5% triethanolamine, 5% phosphoric acid and 0.5% sodium dodecylbenzenesulfonate into the highly dispersed complex, stir at 40-60°C for 30 minutes, and then Add an organic tackifier, 1% styrene, 0.2% di-tert-butyl peroxide, and 0.1% ethylenediamine, and react at 50-70°C for 1-3 hours to obtain a liquid alkali-free quick-...

Embodiment 3

[0056] (1) At room temperature, 55% polyaluminum sulfate (Al 2 o 3 content of 12%) was dissolved in water, then 10% EDTA was added, stirred evenly, and reacted at 30-60°C for 1-2 hours to obtain a complex;

[0057] (2) Add 1% Al-MOF (pore volume is 1.39cm 3 / g, the specific surface area is 2757m 2 / g, the skeleton density is 0.45g / cm 3 ) stirred evenly, ultrasonic treatment for 15 minutes, to obtain a highly dispersed complex;

[0058] (3) under normal temperature, 3% bisphenol A epoxy vinyl ester resin and 1% bisphenol A epoxy resin (epoxy value 0.35) are dissolved in water, stir evenly, obtain organic tackifier;

[0059] (4) Add 5% aluminum hydroxide gel, 5% triethanolamine, 5% phosphoric acid and 0.5% sodium dodecylbenzenesulfonate into the highly dispersed complex, stir at 40-60°C for 30 minutes, and then Add an organic tackifier, 1% styrene, 0.2% di-tert-butyl peroxide, and 0.1% ethylenediamine, and react at 50-70°C for 1-3 hours to obtain a liquid alkali-free quick-...

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Abstract

The invention discloses a liquid alkali-free setting accelerator. The liquid alkali-free setting accelerator contains a complex, an Al-MOF (aluminum-containing metal-organic framework), aluminum hydroxide colloids, an organic tackifier and an auxiliary, wherein raw materials of the complex comprise polyaluminum sulfate and a complexing agent, the organic tackifier contains resin, and the resin contains epoxy vinyl ester resin. The invention further provides a preparation method of the liquid alkali-free setting accelerator. The preparation method comprises steps as follows: (1), polyaluminum sulfate and the complexing agent are subjected to a complex reaction, and the complex is prepared; (2), the complex and the Al-MOF are mixed and subjected to physical and chemical reactions, and a high-dispersion complex is obtained; (3), the high-dispersion complex, aluminum hydroxide gel, the organic tackifier and the auxiliary are stirred and mixed, and the liquid alkali-free setting acceleratoris prepared.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a liquid alkali-free accelerator and a preparation method thereof. Background technique [0002] With the development of my country's urbanization process and traffic road network construction, the amount of sprayed concrete is very considerable. Shotcrete is a construction method of spraying and pouring fine stone concrete with a pressure spray gun. It is often used for pouring tunnel linings, walls, ceilings and other thin-walled structures or linings of other structures and protective layers of steel structures. When in use, use high-pressure air to mix shotcrete and accelerator and spray it on the surface of rock or concrete at a high speed. The quick-setting agent can make the concrete set quickly and form sufficient strength in a short time to meet the requirements of special construction. Alkali-free quick-setting agent is alkali-free, chlorine-free, does not ...

Claims

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Application Information

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IPC IPC(8): C04B24/28C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B24/123C04B24/06C04B24/405C04B22/06C04B24/281C04B2103/40C04B2103/0068C04B22/082
Inventor 马清浩
Owner 陕西天福盛源新材料有限公司
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