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

A kind of preparation method of high-strength alkali-free and chlorine-free accelerator

An accelerator and high-strength technology, applied in the field of concrete admixtures, can solve the problem of low early strength

Active Publication Date: 2021-04-20
ZHENJIANG SOBUTE NEW MATERIAL CO LTD +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of the existing alkali-free accelerators such as low early strength, the invention provides a preparation method of a high-strength alkali-free chlorine-free accelerator

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

[0037] The preparation of high-strength alkali-free and chlorine-free accelerator comprises the following steps:

[0038] (1) Mix 10g of 2-acrylamide-2-methacrylic acid, 1g of acrylic acid, 20g of nano silicon dioxide, 0.92g of ammonium persulfate, 0.08g of sodium bisulfite and 68.9g of water, heat up to 80°C and react Obtain mixed solution A in 8 hours;

[0039] (2) Heat 60g of aluminum sulfate, 12g of diethanolamine, 12g of mixed solution A and 16g of water to react for 5 hours at 80°C to obtain mixed solution B; cool down to room temperature, and then use an emulsifier to disperse at high speed for 10 minutes at a linear speed of 20m / s, that is, a high-strength alkali-free and chlorine-free accelerator.

Embodiment 2

[0041] The preparation of high-strength alkali-free and chlorine-free accelerator comprises the following steps:

[0042] (1) Mix 12g of 2-acrylamide-2-methacrylic acid, 2g of acrylic acid, 20g of nano-silica, 0.92g of ammonium persulfate, 0.08g of sodium bisulfite and 65g of water, heat up to 60°C and react for 5 Hour obtains mixed solution A;

[0043] (2) Heat 40g of aluminum sulfate, 2g of diethanolamine, 6g of mixed solution A and 52g of water to react for 1 hour at 50°C to obtain mixed solution B; cool down to room temperature, and then use an emulsifier to disperse at high speed for 10 minutes at a linear speed of 30m / s, that is, a high-strength alkali-free and chlorine-free accelerator.

Embodiment 3

[0045] The preparation of high-strength alkali-free and chlorine-free accelerator comprises the following steps:

[0046] (1) Mix 15g 2-acrylamide-2-methacrylic acid, 5g acrylic acid, 30g nano-silicon dioxide, 0.08g ammonium persulfate, 0.02g sodium bisulfite and 49.9g water, heat up to 60°C and react Obtain mixed solution A in 5 hours;

[0047] (2) Heat 50g of aluminum sulfate, 10g of triethanolamine, 8g of mixed solution A and 32g of water to react for 2 hours at 50°C to obtain mixed solution B; cool down to room temperature, and then use an emulsifier to disperse at high speed for 10 minutes at a linear speed of 25m / s, that is, a high-strength alkali-free and chlorine-free accelerator.

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 preparation method of a high-strength alkali-free and chlorine-free accelerator: 1) mixing 2-acrylamide-2-methylpropanesulfonic acid, acrylic acid, and a modified nano-silica solution initiator Ultrasonic dispersion with water, heated to 60-80°C and reacted for 5-8 hours to obtain mixed solution A; 2) Heat aluminum sulfate, alcohol amine, water and mixed solution A to 60-80°C for 1-5 hours to obtain mixed solution B: Cool down to room temperature, and then use an emulsifier to disperse at high speed for 10 minutes to obtain a high-strength alkali-free and chlorine-free accelerator. The alkali-free and chlorine-free quick-setting agent prepared by organic modification can greatly improve the 1d compressive strength of cement mortar, and at the same time can improve the stability and other comprehensive properties of the product.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a preparation method of a high-strength alkali-free and chlorine-free accelerator. Background technique [0002] Accelerator is a concrete admixture that makes cement or concrete set and harden quickly. Its main function is to increase the thickness of the first spraying of shotcrete, shorten the interval between the second spraying, and improve the early strength of concrete at the same time, so as to provide support resistance in time. It has been widely used in modern underground engineering, mining engineering, plugging and emergency rescue Wait for the project. [0003] Alkali-free accelerators have little effect on the strength of concrete in the later stage, and are becoming the main direction of accelerator development. Alkali-free accelerators with aluminum sulfate as the main component are easy to obtain raw materials and simple preparation processes. The ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B103/12
CPCC04B40/0039C04B2103/12C04B24/16C04B24/04C04B14/062C04B22/14C04B22/148C04B24/122C04B24/12C04B24/42
Inventor 张小磊王伟乔敏张茜冉千平刘加平
Owner ZHENJIANG SOBUTE NEW MATERIAL CO LTD
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