Liquid alkali-free accelerator

A technology of quick-setting agent and liquid, which is applied in the field of quick-setting agent for construction concrete, which can solve the problems of limited stability period and achieve the effect of promoting the degree of hydration, enhancing the early and late strength, and enhancing the early strength

Active Publication Date: 2020-07-24
丰乐宝化学材料(北京)有限公司
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The supersaturated aluminum sulfate in the existing liquid alkali-free accelerator will produce various aluminum hydroxyl polynuclear complex ions through the hydrolysis react

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid alkali-free accelerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] After adding 45% aluminum sulfate to 34.9% water, add 12% magnesium sulfate, 1.3% 3-hydroxy-3-carboxyglutaric acid, 5% N,N-diethylethanolamine, 1.2 % disodium edetate, stir with a mechanical stirring device and heat the mixture to 60°C until the mixture turns into a clear solution, then add 0.1% diethanol monoisopropanolamine, 0.5% thiosulfuric acid Sodium, stir well, and cool to room temperature.

Embodiment 2

[0029] After adding 47% aluminum sulfate to 30.3% water, add 12% magnesium sulfate, 1.4% 3-hydroxy-3-carboxyglutaric acid, 6% N,N-diethylethanolamine, 1.6 % disodium edetate, stir with a mechanical stirring device and heat the mixture to 60°C until the mixture turns into a clear solution, then add 0.2% diethanol monoisopropanolamine, 1.5% thiosulfuric acid Sodium, stir well, and cool to room temperature.

Embodiment 3

[0031] After adding 47% aluminum sulfate to 29.4% water, then add 12% magnesium sulfate, 1.4% 3-hydroxy-3-carboxyglutaric acid, 6% N,N-diethylethanolamine, 1.9 % disodium edetate, stir with a mechanical stirring device and heat the mixture to 60°C until the mixture turns into a clear solution, then add 0.3% diethanol monoisopropanolamine, 2.0% thiosulfuric acid Sodium, stir well, and cool to room temperature.

[0032] According to the JC477-2005 "Accelerators for Shotcrete" standard, the liquid alkali-free accelerators prepared in the above examples are mainly tested for the basic properties of the slurry setting time, mortar strength, and stability.

[0033] 1. Coagulation time of clean slurry

[0034] The test of the setting time of the clean slurry is based on the JC477-2005 "Accelerator for Shotcrete" standard. The cement used in the test is the benchmark cement (GB8076-2008) produced by Shandong Lucheng Cement Co., Ltd., and the amount of the accelerator is 7% of the cem...

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

No PUM Login to view more

Abstract

The invention discloses a liquid alkali-free accelerator, and belongs to the field of concrete additives. The liquid alkali-free setting accelerator is prepared by uniformly mixing the following raw materials in percentage by mass: 40%-50% of aluminum sulfate, 10%-15% of magnesium sulfate, 0.5%-1.5% of 3-hydroxy-3-carboxyl glutaric acid, 3%-8% of N, N-diethylethanolamine, 1%-3% of ethylenediaminetetraacetic acid disodium salt, 0.1%-0.3% of diethanolisopropanolamine, 0.5%-2% of sodium thiosulfate and the balance of water. The accelerator is used for spraying concrete, the mixing amount is generally 6%-8% of the mass of cement, the accelerating effect is good, excellent early strength and later strength are achieved, and meanwhile the accelerator has long-term stability.

Description

technical field [0001] The invention belongs to the field of concrete additives, in particular to an accelerator for building concrete. Background technique [0002] Concrete quick-setting agent refers to the admixture that can make concrete set and harden quickly. After being mixed into concrete, it can make the concrete set in the initial setting within 2-5 minutes and the final setting in 5-10 minutes. The gypsum in the medium turns into sodium sulfate and loses its retarding effect, thus promoting C 3 A (tricalcium aluminate) hydrates rapidly and precipitates its hydration product crystals in the solution, causing the cement slurry to solidify rapidly. Commonly used accelerators are divided into alkali accelerators and non-alkali accelerators. Alkali accelerators are highly alkaline and may cause physical harm to front-line construction workers. Currently, they are rarely used. Alkali-free accelerators It is further divided into non-alkali quick-setting agent made of h...

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): C04B24/12C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/142C04B24/04C04B24/122C04B24/12C04B22/14
Inventor 刘辉张彪郑小芳
Owner 丰乐宝化学材料(北京)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap