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

A kind of concrete viscosity modifier and preparation method thereof

A viscosity modifier and concrete technology, applied in the field of concrete admixtures, can solve the problems of incompatibility and low concrete strength, and achieve the effects of good compatibility, simple preparation method and low cost

Active Publication Date: 2017-12-05
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the vast majority of thickeners, such as: cellulose, Wenlun rubber, sodium alginate, polyvinyl alcohol, polyacryl, EVA rubber powder, sodium polyacrylate, etc., are incompatible with polycarboxylate superplasticizers. At the same time, the air-entraining effect of the above-mentioned thickeners will also lead to low strength of concrete in the later stage

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
  • A kind of concrete viscosity modifier and preparation method thereof
  • A kind of concrete viscosity modifier and preparation method thereof
  • A kind of concrete viscosity modifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A concrete viscosity regulator, the monomer ratio involved is acryloyloxyethyltrimethylammonium chloride, acrylic acid, N,N'-methylenebisacrylamide in a molar ratio of 1:0.5:0.01, which The preparation method comprises the following steps:

[0027] Add 300g of deionized water, 38.6g of acryloyloxyethyltrimethylammonium chloride, 7.2g of acrylic acid , 0.31g of N,N'-methylenebisacrylamide, and stirred at 70°C until all the monomers were dissolved. Nitrogen gas was introduced into the flask to replace the air in the flask. Then 0.46 g of ammonium persulfate was added to the flask, stirring was continued and the internal temperature of the flask was kept at 70°C to start polymerization. React at constant temperature for 4 hours, lower the temperature to 40°C, and then adjust the pH of the solution to about 6 with a 30 wt% aqueous sodium hydroxide solution to obtain a concrete viscosity regulator with a solid content of about 13%.

[0028] The concrete viscosity modifier...

Embodiment 2

[0030] A concrete viscosity regulator, the molar ratio of the monomer acryloyloxyethyltrimethylammonium chloride, acrylic acid, and N,N'-methylenebisacrylamide is 1:1:0.02, and its preparation method includes The following steps:

[0031] Acryloyloxyethyltrimethylammonium chloride, acrylic acid, and N,N'-methylenebisacrylamide were added to a four-necked flask equipped with a dropping device, a stirrer, a condenser, a thermometer, and a nitrogen gas introduction device. 300g of deionized water, 38.6g of acryloyloxyethyltrimethylammonium chloride, 14.4g of acrylic acid, 0.62g of N,N'-methylenebisacrylamide, and stirred at 65°C until all monomers dissolve. Nitrogen gas was introduced into the flask to replace the air in the flask. Then 0.84 g of ammonium persulfate was added to the flask, stirring was continued and the internal temperature of the flask was maintained at 65°C to start polymerization. React at constant temperature for 4 hours, lower the temperature to 40°C, and...

Embodiment 3

[0034] A concrete viscosity regulator, the molar ratio of the monomer acryloyloxyethyltrimethylammonium chloride, acrylic acid, and N,N'-methylenebisacrylamide is 1:1:0.1, and its preparation method includes The following steps:

[0035] In a four-neck flask equipped with a dropping device, a stirrer, a condenser, a thermometer, and a nitrogen introduction device, add 500 g of deionized water, 38.6 g of acryloyloxyethyltrimethylammonium chloride, and 14.4 g of acrylic acid , 3.1 g of N,N'-methylenebisacrylamide, and stirred at 60° C. until all the monomers were dissolved. Nitrogen gas was introduced into the flask to replace the air in the flask. Then 0.51 g of ammonium persulfate was added to the flask, stirring was continued and the internal temperature of the flask was kept at 60°C to start polymerization. React at constant temperature for 5 hours, lower the temperature to 40°C, and then adjust the pH of the solution to about 7 with a 30 wt% aqueous sodium hydroxide solut...

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 concrete viscosity regulator and a preparation method thereof. The viscosity regulator is obtained by free radical copolymerization of a cationic monomer, an anionic carboxyl monomer and an internal crosslinking agent. The cationic monomer, anionic carboxyl monomer, internal The molar ratio of the crosslinking agent is 1:(0.5-5):(0.01-0.1). The present invention uses cationic monomers and anionic carboxyl monomers to copolymerize to obtain amphoteric polymers, which have obvious anti-polyelectric properties and show good viscosity-increasing performance; at the same time, internal crosslinking agents are added to make the viscosity regulator and gelling material particles A three-dimensional network structure is formed between them, which greatly reduces the problem of concrete segregation and bleeding, and improves the workability of concrete. The prepared concrete viscosity modifier has good compatibility with other admixtures, does not affect the strength development of concrete, and can effectively solve the problem of concrete segregation and bleeding especially under the condition of low gelling materials.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a concrete viscosity modifier and a preparation method thereof. Background technique [0002] With the continuous development of building structure design and super high-rise buildings, building construction also puts forward higher requirements for concrete performance. The continuous complexity of concrete components and the continuous increase in the density of steel bars in building components often require concrete to have a large flow state, but if the mixture is too thin, the concrete is prone to stratification and segregation, which is likely to cause pump blockage and construction site leakage Accidents such as failure of the strength of the solidified body and solidification body to reach the standard will affect the quality and service life of the concrete project. Especially with the continuous deterioration of concrete raw materials, this problem is more prominent...

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): C08F220/34C08F220/06C08F222/38C08F222/06C08F226/02C08F4/40C04B24/26C04B103/44
Inventor 王少峰郑广军毕耀傅承飞李兴孙冲熊龙汪金文邢菊香
Owner CHINA STATE CONSTR READY MIXED CONCRETE 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