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Alkali-free accelerating agent

A technology of quick-setting agent and aluminum sulfate, which is applied in the field of alkali-free quick-setting agent, can solve problems affecting concrete strength and concrete corrosion, and achieve the effects of accelerating the setting speed, improving strength and compactness, and strong cohesive force

Inactive Publication Date: 2018-05-04
云南森博混凝土外加剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the accelerators on the market are alkaline accelerators. Although alkaline accelerators can have a good quick-setting effect, long-term alkaline environments will cause certain corrosion to concrete, which will affect the quality of concrete. strength of concrete

Method used

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  • Alkali-free accelerating agent
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The alkali-free quick-setting agent of the present invention is mainly composed of aluminum sulfate, water, sodium silicate, triethanolamine, xylene, hydroxyethyl carboxymethyl cellulose, sodium fluoride, calcium formate, and the components are in parts by weight 50 parts of aluminum sulfate, 15 parts of water, 7 parts of sodium fluoride, 0.4 parts of xylene, 4 parts of sodium silicate, 0.4 parts of triethanolamine, 0.2 parts of calcium formate, 0.2 parts of hydroxyethyl hydroxymethyl cellulose.

Embodiment 2

[0035] The alkali-free quick-setting agent of the present invention is mainly composed of aluminum sulfate, water, sodium silicate, triethanolamine, xylene, hydroxyethyl carboxymethyl cellulose, sodium fluoride, calcium formate, and the components are in parts by weight 60 parts of aluminum sulfate, 25 parts of water, 13 parts of sodium fluoride, 0.6 parts of xylene, 6 parts of sodium silicate, 0.6 parts of triethanolamine, 0.4 parts of calcium formate, 0.4 parts of hydroxyethyl hydroxymethyl cellulose.

Embodiment 3

[0037] The components are 55 parts by weight of aluminum sulfate, 20 parts of water, 10 parts of sodium fluoride, 0.5 parts of xylene, 5 parts of sodium silicate, 0.5 parts of triethanolamine, 0.3 parts of calcium formate, hydroxyethyl methylol 0.3 parts of cellulose.

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Abstract

The invention relates to an alkali-free accelerating agent, which relates to a concrete admixture, in particular to the alkali-free accelerating agent. Aluminum sulfate is adopted as a base material for preparing the alkali-free accelerating agent; acid solvents such as methacrylic acid and phosphoric acid are added into a system so as to adjust an acidity and alkaline environment of the system; besides, ingredients such as sodium fluoride, calcium formate, triethanolamine and hydroxyethyl carboxymethyl cellulose are added, so that the long-term strength of a concrete is improved, the long-term strength of a project can be prevented from being damaged without corroding a concrete steel quality material; xylene is also added as an exciting agent into the system so as to accelerate a reaction process. According to the alkali-free accelerating agent provided by the invention, the solidification velocity of the concrete is accelerated without introducing alkali and influencing the long-term strength of the concrete.

Description

Technical field [0001] The invention relates to a concrete admixture, in particular to an alkali-free accelerator. Background technique [0002] The use of accelerators can effectively reduce the setting time of cement, thereby reducing the construction period and speeding up the progress of the project. Since the first invention of accelerator in the 1930s, the development and application of accelerator has been rapid. However, the development of accelerators in China is relatively slow. my country’s accelerators are mainly represented by "Red Star-Ⅰ" and "728 type". However, in terms of the accelerators currently on the market in my country, they are mainly based on alkaline accelerators. Mainly coagulant. [0003] Chinese invention patent number CN1407954A discloses the preparation of a quick-setting agent by dissolving aluminum sulfate in water to generate aluminum hydroxide and then adding it to amine-containing water, and using carboxylic acid, phosphoric acid and salt as st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/126C04B24/00C04B12/04C04B24/122C04B24/04C04B24/383
Inventor 阿光强郭军阿光城徐兴爱李金梅
Owner 云南森博混凝土外加剂有限公司