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Waterproof reinforcing alkali-free liquid setting accelerator and preparation method thereof

An enhanced, quick-setting agent technology, applied in the field of building materials, can solve the problems of poor stability and low strength of the accelerator, and achieve the effects of low rebound rate, improved stability, and improved early and later strength

Active Publication Date: 2019-11-01
KZJ NEW MATERIALS GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of poor stability and low strength of the existing quick-setting agent mentioned in the above-mentioned background technology, the present invention provides a waterproof enhanced alkali-free liquid quick-setting agent, which includes a modified aluminate solution, a stabilizer, a pH conditioner, magnesium dihydrogen phosphate and water;

Method used

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  • Waterproof reinforcing alkali-free liquid setting accelerator and preparation method thereof
  • Waterproof reinforcing alkali-free liquid setting accelerator and preparation method thereof
  • Waterproof reinforcing alkali-free liquid setting accelerator and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) Preparation of modified aluminate: Add 18.00g of stearic acid into the reaction kettle, heat up to 70°C, heat to a molten state, turn on the stirring device, then add 6.00g of ammonia water at one time, stir evenly, and react 3.0 h, when the temperature is lowered to 35°C, add 20.00g of aluminum ammonium sulfate, 12.00g of aluminum isopropoxide and 37.00g of water to the reaction kettle, carry out ultrasonic reaction for 3h, drop to normal temperature, then add 7.00g of calcium hydroxide, react for 0.5h, A modified aluminate is obtained.

[0022] (2) Preparation of stabilizer: add 100.00g (trimethylsilyl) acetic acid to the reaction kettle, turn on the stirring device, then add 97.00g 2-(methylamino)ethanol and 3.20g concentrated sulfuric acid at one time, stir After uniformity, start to raise the temperature, raise the temperature to 65°C and react for 5.0 hours, then add 73.00 g of monoethanolamine and continue the reaction for 3.0 hours to obtain a stabilizer;

...

Embodiment 2

[0025] (1) Preparation of modified aluminate: Add 20.00g of stearic acid into the reaction kettle, heat up to 72°C, heat to molten state, turn on the stirring device, then add 7.00g of ammonia water at one time, stir evenly, and react 2.0 h, when the temperature is lowered to 40°C, add 25.00g of aluminum ammonium sulfate, 15.00g of aluminum isopropoxide and 26.00g of water to the reaction kettle, carry out ultrasonic reaction for 2h, drop to normal temperature, then add 7.00g of calcium hydroxide, react for 0.5h, A modified aluminate is obtained.

[0026] (2) Preparation of stabilizer: add 100.00g (trimethylsilyl) acetic acid to the reaction kettle, turn on the stirring device, then add 159.00g 2-(diisopropylamino)ethanol and 4.60g concentrated sulfuric acid at one time, stir After uniformity, start to raise the temperature, raise the temperature to 60°C and react for 4.0 hours, then add 105.00 g of diethanolamine and continue the reaction for 4.0 hours to obtain a stabilizer....

Embodiment 3

[0029] (1) Preparation of modified aluminate: Add 20.00g of stearic acid into the reaction kettle, heat up to 75°C, heat to molten state, turn on the stirring device, then add 8.00g of ammonia water at one time, stir evenly, and react 4.0 h, when the temperature is lowered to 40°C, add 30.00g of aluminum ammonium sulfate, 14.00g of aluminum isopropoxide and 20.00g of water into the reaction kettle, carry out ultrasonic reaction for 4h, drop to normal temperature, then add 8.00g of calcium hydroxide, react for 0.5h, A modified aluminate is obtained.

[0030] (2) Preparation of stabilizer: add 100.00g (trimethylsilyl) acetic acid to the reaction kettle, turn on the stirring device, then add 124.00g 2-(ethylamino)ethanol and 2.80g p-toluenesulfonic acid at one time, stir After uniformity, start to raise the temperature, raise the temperature to 75°C and react for 3.0 hours, then add 119.00 g of triethanolamine and continue the reaction for 2.0 hours to obtain a stabilizer.

[00...

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Abstract

The invention relates to the technical field of building materials and in particular to a waterproof reinforcing alkali-free liquid setting accelerator and a preparation method thereof. The setting accelerator comprises a modified aluminate solution, a stabilizer, a pH value adjusting agent, magnesium biphosphate and water, wherein the preparation method of the modified aluminate solution comprises the following steps: putting stearic acid into a reaction kettle, performing heating to 70-80 DEG C, performing heating to a molten state, powering on a stirring device, adding ammonium hydroxide toimplement a reaction, performing cooling to 35-50 DEG C, adding aluminum sulfate, aluminum isopropoxide and water into the reaction kettle, performing an ultrasonic reaction, performing cooling to anormal temperature, and further adding calcium hydroxide to implement a reaction, so as to obtain modified aluminate. The setting accelerator is applied to synthesis for preparing an alkali-free liquid setting accelerator, the prepared alkali-free liquid setting accelerator has a waterproof function, is capable of improving the durability of concrete, reducing the rebound rate of the concrete, improving the stability of a product and remarkably improving early-stage and later-stage strength of sprayed concrete, and has significant practical application values in concrete construction.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a water-proof enhanced alkali-free liquid accelerator and a preparation method thereof. Background technique [0002] Accelerator is a chemical additive added to cement concrete that can promote the rapid setting and hardening of cement. It is mainly used in occasions that require rapid setting of cement concrete, such as anchor shotcreting support for mine roadways, emergency plugging, mine shafts, tunnels And other underground protection works. [0003] At present, there are several types of liquid accelerators commonly used: 1. Sodium silicate-based liquid accelerators, whose main quick-setting components are water glass and modified sodium silicate; 2. Aluminate-based liquid accelerators , its main quick-setting components are sodium aluminate, potassium aluminate and aluminum sulfate; 3, carbonate or hydroxide-based quick-setting agent, its main quick-setting com...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B22/08C07F7/10C04B103/12C04B103/65
CPCC04B40/0039C04B22/0093C04B24/42C07F7/10C04B2103/12C04B2103/65C04B22/16C04B24/123C04B22/165C04B22/126
Inventor 官梦芹郭鑫祺蒋卓君李祥河陈晓彬林添兴郭元强
Owner KZJ NEW MATERIALS GROUP CO LTD
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