Slow-release polycarboxylate superplasticizer as well as preparation method and application thereof

A slow-release polycarboxylic acid and water-reducing agent technology, applied in the field of building material admixtures, can solve the problems of excessive concrete slump loss, concrete segregation, delayed bleeding, etc., so as to achieve no pollution in the synthesis process and reduce economic cost, the effect of improving the placement time

Pending Publication Date: 2022-05-13
SHANXI SUNWAY INTION TRADE CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are still a series of problems in the process of use, such as: the compatibility between polycarboxylate superplasticizer and cement. In high temperature weather or long-term, long-distance transportation, the concrete slump will often lose too much Fast phenomenon; this is because in engineering, the compounding of water reducer, sodium gluconate, white sugar, sodium hexametaphosphate and other retarders is often used to improve the fluidity of concrete; however, this method cannot completely solve the problem. Concrete slump loss, and may also lead to concrete segregation, delayed bleeding, corruption and other problems

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
  • Slow-release polycarboxylate superplasticizer as well as preparation method and application thereof
  • Slow-release polycarboxylate superplasticizer as well as preparation method and application thereof
  • Slow-release polycarboxylate superplasticizer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a slow-release polycarboxylate water reducer and its preparation method, the specific details are as follows:

[0047] S1: Add 240g of Auke 801 polyoxyethylene ether macromonomer, 196g of deionized water, and 3.78g of hydrogen peroxide according to the weight percentage into a four-necked flask connected with a stirring device and a thermometer with a capacity of 1L, and configure it as a bottom liquid;

[0048] S2: Add 10.8g of acrylic acid, 23.2g of hydroxyethyl acrylate, 26.03g of hydroxypropyl acrylate, 6.51g of hydroxyethyl methacrylate into Erlenmeyer flask A, and add 20g of deionized water to obtain liquid A;

[0049] S3: Add 1 g of ascorbic acid, 1 g of mercaptopropionic acid, and 30 g of deionized water into Erlenmeyer flask B.

[0050] S4: Use a peristaltic pump to continuously drop liquid A and liquid B into the bottom liquid of the four-necked flask, and control the dripping time for 180 minutes under constant stirring at a temperatu...

Embodiment 2

[0053] This example provides a slow-release polycarboxylate superplasticizer, the preparation method and proportion of which are the same as those in Example 1. The difference from Example 1 is that 10.8g of acrylic acid, 29.0g of hydroxyethyl acrylate, 29.0g of hydroxyethyl acrylate, 19.5 g of hydroxypropyl acrylate and 6.51 g of hydroxyethyl methacrylate were used to obtain a slow-release polycarboxylate superplasticizer.

Embodiment 3

[0055] This example provides a slow-release polycarboxylate superplasticizer, the preparation method and proportion of which are the same as those in Example 1. The difference from Example 1 is that 10.8 g of acrylic acid and 29.0 g of hydroxyethyl acrylate are added to liquid A. , 13.0 g of hydroxypropyl acrylate, and 13.0 g of hydroxyethyl methacrylate to obtain a slow-release polycarboxylate superplasticizer.

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 provides a slow-release polycarboxylate superplasticizer which comprises the following raw materials in percentage by mass: the slump retaining time of the slow-release polycarboxylate superplasticizer reaches 3h, and the slow-release polycarboxylate superplasticizer can meet the performance requirements under the conditions of overlong transportation time and the like at present.

Description

technical field [0001] The invention relates to the technical field of building material admixtures, in particular to a slow-release polycarboxylate water reducer and its preparation method and application. Background technique [0002] Polycarboxylate superplasticizer has the characteristics of low dosage, high water reduction and strong molecular structure regulation, and is widely used in concrete engineering. [0003] However, there are still a series of problems in the process of use, such as: the compatibility between polycarboxylate superplasticizer and cement. In high temperature weather or long-term, long-distance transportation, the concrete slump will often lose too much Fast phenomenon; this is because in engineering, the compounding of water reducer, sodium gluconate, white sugar, sodium hexametaphosphate and other retarders is often used to improve the fluidity of concrete; however, this method cannot completely solve the problem. Concrete slump loss, and may ...

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 Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/20C04B24/26C04B103/30
CPCC08F283/065C04B24/2694C04B2103/302C08F220/06C08F220/20
Inventor 马雪英王宏维王英维
Owner SHANXI SUNWAY INTION TRADE CO LTD
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