Alkali-free liquid accelerator and preparation method thereof

A quick-setting agent and liquid technology, applied in the field of concrete additives, can solve the problems of reducing the strength of cement stones, and achieve the effects of enhancing strength, accelerating initial and final setting speeds, and good selectivity

Active Publication Date: 2021-10-26
蓝盾(云南)工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current non-alkali liquid quick-setting agent has the problem of reducing the strength of cement in the later stage

Method used

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  • Alkali-free liquid accelerator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 2 parts of iminodisuccinic acid in 100 parts of water, add 18 parts of anhydrous aluminum sulfate and 10 parts of pseudoboehmite, stir for 30 minutes, after the stirring is completed, add 0.6 parts of triisopropanolamine, 2 parts of carboxymethyl Base cellulose, and 1.8 parts of natural rubber latex was added dropwise to the solution, and the stirring was continued during the whole dropping process. After the stirring was completed, the pH was adjusted to 7 to obtain the alkali-free liquid quick-setting agent J1.

Embodiment 2

[0023] Take 2 parts of iminodisuccinic acid dissolved in 100 parts of water, add 25 parts of anhydrous aluminum sulfate, 9 parts of pseudoboehmite, stir for 30 minutes, after the stirring is completed, add 0.6 parts of triisopropanolamine, 2 parts of carboxymethyl Base cellulose, and 1.8 parts of natural rubber latex was added dropwise to the solution, and the stirring was continued during the whole dropping process. After the stirring was completed, the pH was adjusted to 7 to obtain the alkali-free liquid quick-setting agent J2.

Embodiment 3

[0025] Dissolve 3 parts of sodium iminodisuccinate in 100 parts of water, add 48 parts of aluminum sulfate octadecahydrate and 9 parts of pseudoboehmite, stir for 30 minutes, after the stirring is completed, add 0.6 parts of triisopropanolamine, 2 parts Carboxymethyl cellulose, and 2 parts of cis-butadiene latex are added dropwise to the solution, and the stirring is continued during the whole dropping process. After the stirring is completed, the pH is adjusted to 7 to obtain the alkali-free liquid quick-setting agent J3.

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Abstract

The invention provides an alkali-free liquid accelerator. A preparation method for the alkali-free liquid accelerator comprises the following steps: dissolving 1-5 parts of iminodisuccinic acid or salt thereof in 100 parts of water, adding 15-30 parts of aluminum sulfate and 5-15 parts of pseudo-boehmite, conducting stirring for at least 30 minutes, adding 0.5-1 part of triisopropanolamine and 1-3 parts of a dispersion stabilizer after stirring, performing continuous stirring, dropwise adding 1-2 parts of latex, and after dropwise addition, adjusting the pH value of the whole system to 6-8. The alkali-free liquid accelerator is simple in preparation method, high in initial setting speed and final setting speed and high in later strength.

Description

technical field [0001] The invention belongs to the technical field of concrete additives, and in particular relates to an alkali-free liquid quick-setting agent and a method for preparing the alkali-free liquid quick-setting agent. Background technique [0002] In recent years, shotcrete has been widely used in my country's urban construction and road construction projects, especially the railways and highways in the west of my country. Due to the mountainousness in the west, a large number of tunnels will be built during the construction process. At the same time, its 1d compressive strength should be as high as possible, and the subsequent compressive strength loss rate should be as low as possible. [0003] Accelerator is an indispensable key material in shotcrete. Accelerators are divided into alkali accelerators and alkali-free accelerators. At present, alkali-free liquid accelerators are the main development direction of accelerators. It has the advantages of friendly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/06C04B24/12C04B24/122C04B24/24C04B24/383
Inventor 关志文
Owner 蓝盾(云南)工程技术有限公司
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