Alkali-free chloride-free liquid accelerating agent as well as preparation method thereof and application thereof

A technology of quick-setting agent and liquid, which is applied in the field of building materials, can solve the problems of narrow cement application range, large dosage, and affecting the durability of concrete, and achieve the effect of remarkable quick-setting effect, high early strength and low comprehensive cost

Active Publication Date: 2017-12-01
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of high-speed railways, highways, and urban subways, shotcrete technology has been widely promoted, and powder accelerators and alkaline liquid accelerators can no longer meet the construction technical requirements.
[0003] The existing Chinese application CN 101423356A discloses a preparation method of an accelerator using aluminum sulfate, sodium fluoride, and triethanolamine as main raw materials, but the accelerator introduces sod

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] An alkali-free and chlorine-free liquid quick-setting agent, the liquid quick-setting agent is prepared from the following mass percentage components: 10.25% aluminum polycarboxylate liquid dispersant, 40% aluminum sulfate, 1% calcium fluoride, and 1.5% Triethanolamine adjusts the pH value, and the balance is water. The pH of the finished product of alkali-free and chlorine-free liquid accelerator is 4.5.

[0037] In this embodiment, a slow-setting polycarboxylic acid water reducer mother liquor is used to prepare a polycarboxylic acid aluminum liquid dispersant.

Example Embodiment

[0038] Example 2

[0039] An alkali-free and chlorine-free liquid quick-setting agent, said liquid quick-setting agent is prepared from the following mass percentage components: 10.25% polyaluminum carboxylate liquid dispersant, 65% aluminum sulfate octahydrate, 0.5% fluorosilicic acid, Add 2.0% triethanolamine to adjust the pH, and the rest is water. The pH of the finished product of alkali-free and chlorine-free liquid accelerator is 3.8.

[0040] In this embodiment, a slow-setting polycarboxylic acid water reducer mother liquor is used to prepare a polycarboxylic acid aluminum liquid dispersant.

Example Embodiment

[0041] Example 3

[0042] An alkali-free and chlorine-free liquid quick-setting admixture, which is prepared from the following mass percentage components: 10.25% aluminum polycarboxylate liquid dispersant, 65% aluminum sulfate octahydrate, 0.5% calcium fluoride, Add 1.5% triethanolamine to adjust the pH value, and the rest is water. The pH of the finished product of alkali-free and chlorine-free liquid accelerator is 3.5.

[0043] In this embodiment, a standard polycarboxylate water-reducing agent mother liquor is used to prepare a polycarboxylate liquid dispersant.

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Abstract

The invention relates to an alkali-free chloride-free liquid accelerating agent as well as a preparation method thereof and application thereof. The liquid accelerating agent is an aqueous solution comprising 5-15 parts of a poly(aluminum carboxylate) liquid dispersing agent and 30-50 parts of aluminum sulfate. The liquid accelerating agent can be widely applied to tunnels, maritime work, support of subway, repairing, leakage prevention, water sealing and the like. Concrete using the accelerating agent is remarkable in accelerating effect, is low in rebound ratio and is high in early strength. The alkali-free chloride-free liquid accelerating agent is non-toxic and harmless, is low in comprehensive cost, and is free of pollution during production, transportation and use.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an alkali-free and chlorine-free liquid quick-setting agent as well as a preparation method and application thereof. Background technique [0002] Accelerator is an indispensable admixture for shotcrete. Its function is to promote the setting and hardening of cement, improve the early strength of shotcrete, and help to speed up the construction period. With the rapid development of high-speed railways, highways, and urban subways, shotcrete technology has been widely promoted, and powder accelerators and alkaline liquid accelerators can no longer meet the construction technical requirements. [0003] The existing Chinese application CN 101423356A discloses a preparation method of an accelerator using aluminum sulfate, sodium fluoride, and triethanolamine as main raw materials, but the accelerator introduces sodium salt, which may cause alkali-aggregate reac...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B103/12
CPCC04B40/0039C04B2103/12C04B24/2694C04B22/148
Inventor 李崇智樊德庆章超
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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