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Alkali-free liquid accelerator and production process thereof

A production process and technology of quick-setting agent, applied in the field of alkali-free liquid quick-setting agent and production technology, can solve the problem of large dosage affecting concrete performance, etc., and achieve the effect of good quick-setting effect, improved stability and reduced damage

Active Publication Date: 2020-04-14
四川恒泽建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a non-alkali liquid quick-setting agent to solve the technical problem in the prior art that the large amount of the non-alkali liquid quick-setting agent affects the performance of concrete

Method used

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  • Alkali-free liquid accelerator and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of alkali-free liquid accelerator:

[0028] 1.1 Raw materials (in parts by weight):

[0029] 60 parts of polyaluminum sulfate; 4.5 parts of sodium fluoride; 10 parts of aluminum n-butoxide; 1.5 parts of triethanolamine; 1.5 parts of diethanolamine; 0.7 parts of magnesium silicate; 2 parts of glycerol; 2 parts of hydroxyethyl cellulose; 3 parts of phosphoric acid ; 35 parts of deionized water.

[0030] 1.2 Preparation method:

[0031] It includes the following steps:

[0032] (1) Weigh each raw material according to the proportion;

[0033] (2) Add sodium fluoride and deionized water into the reaction vessel, after the temperature is raised to 60°C, add mineral acid, and stir at a speed of 1800r / min for 25min; obtain solution A;

[0034] (3) Add polyaluminum sulfate to solution A; stir for 40 minutes at a speed of 1800r / min; obtain solution B;

[0035] (4) After heating to 75°C, add aluminum n-butoxide, triethanolamine, diethanolamine, magnesium silicate and thickener to...

Embodiment 2

[0038] Preparation of alkali-free liquid accelerator:

[0039] 2.1 Raw materials (in parts by weight):

[0040] 50 parts of polyaluminum sulfate; 3 parts of sodium fluoride; 8 parts of aluminum isooctanolate; 3 parts of triethanolamine; 1 part of diethanolamine; 0.5 parts of magnesium silicate; 3 parts of glycerol; 1 part of hydroxyethyl cellulose; 5 parts of phosphoric acid ; 30 parts of deionized water.

[0041] 2.2 Preparation method:

[0042] It includes the following steps:

[0043] (1) Weigh each raw material according to the proportion;

[0044] (2) Add sodium fluoride and deionized water into the reaction vessel, heat up to 55°C, add mineral acid, and stir for 30 minutes at a speed of 1000r / min; to obtain solution A;

[0045] (3) Add polyaluminum sulfate to solution A; stir for 50 minutes at a speed of 2000r / min; obtain solution B;

[0046] (4) After heating to 70°C, add aluminum isooctanolate, triethanolamine, diethanolamine, magnesium silicate and thickener to solution B; stir f...

Embodiment 3

[0049] Preparation of alkali-free liquid accelerator:

[0050] 3.1 Raw materials (in parts by weight):

[0051] 70 parts of polyaluminum sulfate; 6 parts of sodium fluoride; 12 parts of aluminum n-octanoxide; 1 part of triethanolamine; 3 parts of diethanolamine; 1 part of magnesium silicate; 1 part of glycerol; 3 parts of hydroxyethyl cellulose; 1 part of phosphoric acid ; 40 parts of deionized water.

[0052] 3.2 Preparation method:

[0053] It includes the following steps:

[0054] (1) Weigh each raw material according to the proportion;

[0055] (2) Add sodium fluoride and deionized water into the reaction vessel, heat up to 65°C, add mineral acid, and stir at 2000r / min for 20min; obtain solution A;

[0056] (3) Add polyaluminum sulfate to solution A; stir for 30 minutes at a speed of 1500r / min; obtain solution B;

[0057] (4) After the temperature is raised to 80°C, add aluminum n-octanoxide, triethanolamine, diethanolamine, magnesium silicate and thickener to solution B; stir at 1500...

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Abstract

The invention provides an alkali-free liquid accelerator and a production process thereof. In the prior art, the performance of concrete is influenced by a large mixing amount of an alkali-free liquidaccelerator. A purpose of the invention is to solve the technical problem in the prior art. The alkali-free liquid accelerator is prepared from the following raw materials in parts by weight: 50-70 parts of polyaluminum sulfate, 3-6 parts of sodium fluoride, 8-12 parts of aluminum alkoxide, 1-2 parts of triethanolamine, 1-2 parts of diethanol amine, 0.5-1.0 part of magnesium silicate, 1-3 parts of glycerol, 1-3 parts of a thickening agent, 1-5 parts of an inorganic acid, and 30-40 parts of deionized water. According to the alkali-free liquid accelerator provided by the invention, the accelerator prepared by taking polyaluminum sulfate as a main raw material has good accelerating effect, and the mixing amount of the accelerator can be reduced, namely, the introduction of sulfate ions is reduced, so that the damage of the accelerator to the later strength of concrete is reduced, and the stability of the accelerator is improved while the mixing amount is reduced.

Description

Technical field [0001] The invention relates to an accelerator, in particular to an alkali-free liquid accelerator and a production process. Background technique [0002] Accelerating agent refers to an admixture that can be mixed into concrete to quickly set and harden. According to its form, it can be divided into solid and liquid. [0003] The solid accelerator refers to the traditional powder accelerator, and its mixing amount accounts for 3.0%-8.0% of the cement content in the concrete. It can make the concrete initially set within 5 minutes and finally set within 12 minutes. In order to achieve emergency repairs or concrete in tunnels The purpose of rapid setting; it is an indispensable additive in the sprayed concrete construction method. Their function is to accelerate the hydration and hardening of cement and form sufficient strength in a short period of time to ensure special construction requirements. [0004] Liquid accelerators are mainly used in sprayed concrete and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/126C04B24/026C04B24/122C04B22/08C04B24/383C04B22/165C04B22/002
Inventor 钟根芽滕文生贾维龙袁慧莉
Owner 四川恒泽建材有限公司
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