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Liquid alkali-free accelerator and preparation thereof

A technology of quick-setting agent and liquid, applied in the field of liquid alkali-free setting accelerator and its preparation, can solve the problems of low 1d strength, low 28d strength retention rate, poor stability of alkali-free setting accelerator, etc. The effect of good stability and no environmental pollution

Inactive Publication Date: 2020-05-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a liquid alkali-free quick-setting agent and its preparation in order to overcome the defects in the above-mentioned prior art, so as to solve the problem of poor stability of the existing alkali-free quick-setting agent, low 1d strength, and low 28d strength retention rate And other issues

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 100.00 parts of aluminum sulfate, 1.00 parts of triethanolamine, 0.88 parts of ethylene glycol, 1.40 parts of glycolic acid, 0.54 parts of dibutyl phthalate, 5.26 parts of phosphoric acid, and 66.39 parts of distilled water; take aluminum sulfate and add it to the reaction vessel , Pour in water, heat the water bath to 65°C and maintain a constant temperature; while stirring, add ethylene glycol, triethanolamine, dibutyl phthalate, glycolic acid, and phosphoric acid in sequence, and the time interval between adding each component is 8 minutes; Stir continuously until it cools naturally. The performance test results are shown in Table 1.

Embodiment 2

[0030] Weigh 100.00 parts of aluminum sulfate, 1.51 parts of triethanolamine, 1.51 parts of ethylene glycol, 1.93 parts of glycolic acid, 0.51 parts of dibutyl phthalate, 7.02 parts of phosphoric acid, and 62.96 parts of distilled water; take aluminum sulfate and add it to the reaction vessel , Pour in water, heat the water bath to 75°C and maintain a constant temperature; while stirring, add ethylene glycol, triethanolamine, dibutyl phthalate, glycolic acid, and phosphoric acid in sequence, and the time interval between adding each component is 10 minutes; Stir continuously until it cools naturally. The performance test results are shown in Table 1.

Embodiment 3

[0032] According to 100.00 parts of aluminum sulfate, 1.20 parts of triethanolamine, 1.00 parts of ethylene glycol, 1.51 parts of glycolic acid, 0.52 parts of dibutyl phthalate, 6.00 parts of phosphoric acid, and 64.91 parts of distilled water; Pour in the water, heat the water bath to 70°C and keep the constant temperature; while stirring, add ethylene glycol, triethanolamine, dibutyl phthalate, glycolic acid, phosphoric acid in sequence, and the time interval between adding each component is 9 minutes; keep stirring until it cools down naturally.

[0033] Performance tests were performed on the products prepared in the above embodiments, and the results are shown in Table 1 below.

[0034] Table 1

[0035]

[0036] It can be seen that the liquid alkali-free accelerator produced by the present invention can meet the effect requirements of the sprayed concrete field on the accelerator, and the liquid alkali-free accelerator produced by the present invention is not prone to...

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Abstract

The invention relates to a liquid alkali-free accelerator and preparation thereof. The accelerator is prepared from the following components in parts by weight: 100 parts of aluminum sulfate, 1.00 to1.51 parts of triethanolamine, 0.88 to 1.51 parts of ethylene glycol, 1.40 to 1.93 parts of glycollic acid, 0.51 to 0.54 parts of dibutyl phthalate, 5.26 to 7.02 parts of phosphoric acid and 62.96 to66.39 parts of water. Compared with the prior art, the accelerator has the advantages of favorable stability, low tendency to deteriorate and precipitate, higher retention rates of 1d strength and 28dstrength and the like.

Description

technical field [0001] The invention belongs to the technical field of accelerators, and relates to a liquid alkali-free accelerator and its preparation. Background technique [0002] Accelerator is a chemical admixture that can quickly set and harden cement or concrete, and is an essential component of shotcrete. In recent years, with the construction of a large number of projects such as spray anchor support, railway tunnels, mines, emergency repair reinforcement and plugging, the demand for accelerators is also increasing. The development of liquid accelerator solves the inherent problems of large dust and large rebound of dry sprayed concrete with traditional powder accelerator, which helps to improve the construction quality of sprayed concrete and the environment of sprayed construction. However, the liquid alkali accelerator is highly corrosive and will cause harm to the health of construction workers. In addition, the use of alkali accelerator can make the cement f...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/165C04B24/122C04B24/026C04B24/04C04B24/045
Inventor 孙振平麻哲瑜冀言亮黎碧云
Owner TONGJI UNIV