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

Water reducing agent of poly carboxylic acid series concrete and its preparation process

A technology of concrete water reducing agent and polycarboxylate system, which is applied in the field of polycarboxylate concrete water reducing agent and its preparation, can solve the problems of low water reducing rate, high equipment requirements, complex production process, etc., and achieve stable performance, The effect of simple addition procedure and easy control of reaction conditions

Inactive Publication Date: 2007-04-04
WUHAN UNIV OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems of complex production process, high equipment requirements and low water reducing rate in the past, and provide a polycarboxylate concrete water reducing agent and its preparation method. The water reducing agent synthesized by this method has High water reduction rate, simple synthesis process, simple and easy to control reaction conditions, easy industrial production, etc.

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
  • Water reducing agent of poly carboxylic acid series concrete and its preparation process
  • Water reducing agent of poly carboxylic acid series concrete and its preparation process
  • Water reducing agent of poly carboxylic acid series concrete and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Put 7.91g of sodium methacrylsulfonate into a reaction vessel, add 15.82g of water, stir evenly, raise the temperature, add 72g of acrylic acid dropwise at a temperature of 80±5°C, and add ammonium persulfate solution (0.39g ammonium persulfate and 0.79g water), the mol ratio of reaction substance sodium methacrylate and acrylic acid is 0.05: 1, and the initiator ammonium persulfate consumption is 0.5% of the total mass of sodium methacrylate and acrylic acid. Acceleration, the drop is completed within 90 minutes, keep the temperature at 85±5°C, and react for another 6.5 hours. Then add polyethylene glycol 100g with a molecular weight of 1000, p-toluenesulfonic acid 1.79g, wherein the molar ratio of polyethylene glycol and acrylic acid used is 0.1:1, and the amount of p-toluenesulfonic acid is polyethylene glycol and active group 1% of the total mass of the polymer, stirring and continuing to heat, react for another 11 hours, stop heating, when the temperature drops to ...

Embodiment 2

[0040]Put 7.91g of sodium methacrylsulfonate into a reaction vessel, add 15.82g of water, stir evenly, raise the temperature, add 7.2g of acrylic acid dropwise at a temperature of 80±5°C, and add ammonium persulfate solution (1.51 g ammonium persulfate and 3.02g water), the mol ratio of reaction substance sodium methacrylate and acrylic acid is 0.5: 1, and the initiator ammonium persulfate consumption is 10% of sodium methacrylate and acrylic acid gross mass, control Dropping speed, the drop is completed within 90 minutes, and the temperature is maintained at 85±5°C, and the reaction is continued for 6.5 hours. Then add 60 g of polyethylene glycol with a molecular weight of 1000, and 7.5 g of p-toluenesulfonic acid, wherein the molar ratio of polyethylene glycol and acrylic acid used is 0.6: 1, and the amount of p-toluenesulfonic acid is polyethylene glycol and active groups. 10% of the total mass of the high molecular polymer, stirring and continuing to heat, and then reactin...

Embodiment 3

[0043] Put 7.91g of sodium methacrylate into a reaction vessel, add 15.82g of water, stir evenly, raise the temperature, add 36g of acrylic acid dropwise at a temperature of 80±5°C, and add ammonium persulfate solution (1.98g ammonium persulfate and 3.96g water), the mol ratio of reaction substance sodium methacrylate and acrylic acid is 0.1: 1, and the initiator ammonium persulfate consumption is 4.5% of the total mass of sodium methacrylate and acrylic acid. Acceleration, the drop is completed within 90 minutes, keep the temperature at 85±5°C, and react for another 6.5 hours. Then add 150 g of polyethylene glycol with a molecular weight of 1000, and 3.87 g of p-toluenesulfonic acid, wherein the molar ratio of polyethylene glycol and acrylic acid used is 0.3:1, and the amount of p-toluenesulfonic acid is polyethylene glycol and active group 2% of the total mass of the polymer, stirring and continuing to heat, react for another 11 hours, stop heating, when the temperature drop...

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
slumpaaaaaaaaaa
Login to View More

Abstract

A poly-carboxylic acid-series water reducing agent for high-performance concrete is prepared through reaction between sodium methylacrylsulfonate and acrylic acid under the action of trigger to obtain a high-molecular polymer, and esterifying reaction on polyethanediol. Its advantages are low content of alkali, high water reducing effect, and high effect to improve performance of concrete.

Description

technical field [0001] The invention belongs to a polycarboxylate concrete water reducing agent and a preparation method thereof. technical background [0002] As we all know, in the operation of cement mixture, in order to make the operation labor-saving and effective, and early demoulding shorten the construction period, the cement mixture is required to have high fluidity, effectively inhibit the loss of slump, and have sufficient early strength in the initial stage of hardening. At present, my country's concrete superplasticizers are mainly naphthalene-based and melamine-based products. The cement mixture of these products has poor workability, low water-reducing rate and large slump loss. Although the slump loss of water-soluble ethylene copolymer cement dispersant is small, the setting time is greatly prolonged, resulting in low early strength, which cannot meet the needs of the project well, and the production process is complicated. However, the maleic anhydride-bas...

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): C04B24/26C04B24/04C04B103/30
Inventor 马保国谭洪波董荣珍
Owner WUHAN UNIV OF TECH
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