Waterproof alkali-liquid-free quick-setting agent having water reducing function, and preparation method thereof

A waterproof, accelerator technology, applied in the field of building materials, can solve the problems of increase, decrease of concrete strength, strong alkali corrosion, etc., and achieve the effect of high application value, high early strength, and improved stability

Active Publication Date: 2019-10-22
KZJ NEW MATERIALS GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, traditional liquid accelerators have strong alkali corrosion, which will cause harm to construction personnel and the environment. At the same time, it will reduce the strength of concrete by 30% or even higher in the later stage, which seriously affects the support quality of underground projects; Although they have quick-setting effects, they can also improve the early strength, but they have no water-reducing function, and often increase the water demand for construction, which will inevitably increase the water-cement ratio, which will have an adverse effect on the strength of concrete.

Method used

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  • Waterproof alkali-liquid-free quick-setting agent having water reducing function, and preparation method thereof
  • Waterproof alkali-liquid-free quick-setting agent having water reducing function, and preparation method thereof
  • Waterproof alkali-liquid-free quick-setting agent having water reducing function, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (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 2.00g of lithium hydroxide at one time, stir evenly, React for 3.0 hours, when the temperature is lowered to 35°C, add 35.00g of aluminum citrate and 37.00g of water to the reaction kettle, carry out ultrasonic reaction for 3 hours, lower to normal temperature, then add 6.00g of calcium hydroxide, react for 0.5h, and obtain modified aluminum salt;

[0029] (2) Preparation of stabilizer: Add 100.00g (trimethylsilyl) acetic acid to the reaction kettle, turn on the stirring device, and then add 85.00g 2-(methylamino)ethanol, 10.00g 2-(ethylamino) Ethanol and 2.50g p-toluenesulfonic acid, after stirring evenly, start to heat up, and react at 75°C for 3.0h to prepare a stabilizer;

[0030] (3) Add 4.00 g of the stabilizer prepared in step (2) and 30.00 g of water into the reaction kettle for stirring, then a...

Embodiment 2

[0032] (1) Preparation of modified aluminate: 23.00g of stearic acid is added to the reaction kettle, the temperature is raised to 80°C, heated to a molten state, the stirring device is turned on, and 1.80g of lithium hydroxide is added at one time, and stirred evenly, React for 4.0 hours, when the temperature is lowered to 40°C, add 30.00g of aluminum citrate and 37.20g of water to the reaction kettle, carry out ultrasonic reaction for 3 hours, lower to normal temperature, then add 8.00g of calcium hydroxide, react for 1.0h, and obtain modified aluminum salt;

[0033] (2) Preparation of stabilizer: Add 100.00g (trimethylsilyl) acetic acid to the reaction kettle, turn on the stirring device, and then add 80.00g 2-(diisopropylamino)ethanol, 15.00g 2-(methylamine) Base) ethanol and 3.60g of concentrated sulfuric acid, after stirring evenly, start to heat up, and react for 4.0h at 65°C to prepare a stabilizer;

[0034] (3) Add 3.00g of the stabilizer prepared in step (2) and 30....

Embodiment 3

[0036] (1) Preparation of modified aluminate: add 16.00g of stearic acid into the reaction kettle, heat up to 70°C, heat to a molten state, turn on the stirring device, then add 2.60g of lithium hydroxide at one time, stir evenly, React for 4.0 hours, when the temperature is lowered to 45°C, add 26.00g of aluminum citrate and 48.40g of water to the reaction kettle, carry out ultrasonic reaction for 4 hours, lower to normal temperature, then add 7.00g of calcium hydroxide, react for 1.0h, and obtain modified aluminum salt;

[0037] (2) Preparation of stabilizer: Add 100.00g (trimethylsilyl) acetic acid to the reaction kettle, turn on the stirring device, and then add 90.00g 2-(ethylamino)ethanol, 12.00g 2-(methylamino) Ethanol and 2.00g of concentrated sulfuric acid were stirred evenly, and then the temperature was raised, and the temperature was raised to 70°C for 3.5 hours to prepare a stabilizer;

[0038](3) 4.00g of the stabilizer prepared in step (2) and 30.00g of water a...

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PUM

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Abstract

The invention relates to the technical field of building materials, particularly to a waterproof alkali-liquid-free quick-setting agent having water reducing function, and a preparation method thereof, wherein the raw materials comprise, by weight, modified aluminate, aluminum hydroxide, a stabilizer, a pH value adjuster, ethanolamine phosphate, magnesium fluorosilicate, sodium lignosulfonate, andthe balance of water. According to the present invention, the performances of the quick-setting agent are optimized by using the inorganic-organic material compounding technology and the quick-setting agent modification technology, such that the obtained quick-setting agent integrates the advantages of rapid setting, no alkali, good stability, high early strength and late strength maintaining, further has water reducing function and waterproof function, can make the prepared shotcrete useful, and can be widely used in the fields of bridges, tunnels, underground engineering and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a waterproof alkali-free liquid quick-setting agent with water-reducing function and a preparation method thereof. Background technique [0002] Accelerators can be divided into powder accelerators and liquid accelerators according to their state. Powder accelerators began to be researched and applied abroad in the 1930s. Powder accelerators are easy to dry in the process of dry spraying. It causes dust pollution, pollutes the environment, uneven concrete dispersion, high energy consumption and other shortcomings, and at the same time, it has a certain degree of harm to the construction personnel's body during the construction process. In the 1980s, with the development of sprayed concrete wet spraying technology, liquid accelerators began to appear in the world. Liquid accelerators can effectively avoid low construction efficiency, high rebound rate, and dust caused b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/12
CPCC04B40/0039C04B2103/12C04B24/04C04B22/0093C04B22/06C04B24/122C04B22/126C04B24/18C04B24/085C04B22/062C04B24/06C04B22/064C04B24/42C04B24/20C04B28/04C04B22/165C04B24/123C04B22/141
Inventor 李祥河官梦芹郭鑫祺蒋卓君陈晓彬林添兴温庆如郭元强
Owner KZJ NEW MATERIALS GROUP CO LTD
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