Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF6 Cites 5 Cited by
  • 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 sodium salt, which may cause alkali-aggregate reaction in the later stage and affect the durability of concrete property, the retention value of the late strength of the concrete is low
Chinese application CN 101475335A discloses an alkali-free quick-setting agent mainly composed of aluminum sulfate, metal fluoride, and amines, adding a pH regulator and a thickening substance, and its adaptability to cement is relatively narrow, and the dosage is relatively large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0037] In this example, a retarded polycarboxylate superplasticizer mother liquor was used to prepare a polycarboxylate aluminum liquid dispersant.

Embodiment 2

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

[0040] In this example, a retarded polycarboxylate superplasticizer mother liquor was used to prepare a polycarboxylate aluminum liquid dispersant.

Embodiment 3

[0042] A kind of alkali-free and chlorine-free liquid quick-setting agent, described liquid quick-setting agent is made by the following mass percent components: 10.25% aluminum polycarboxylate liquid dispersant, 65% aluminum sulfate octadecahydrate, 0.5% calcium fluoride, Add 1.5% triethanolamine to adjust the pH value, and the balance is water. The pH of the finished alkali-free and chlorine-free liquid accelerator is 3.5.

[0043] In this example, a standard polycarboxylate water reducer mother liquor was used to prepare a polycarboxylate aluminum liquid dispersant.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com