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

High-liquidity polycarboxylic acid water reducing agent and preparation method thereof

A high-slump-preserving, water-reducing agent technology, which is applied in the research and manufacture of concrete admixtures, can solve problems such as long transportation time and loss of concrete slump, and achieve the effect of preventing hydration and prolonging the setting time of cement

Active Publication Date: 2015-11-11
XINJIANG DELAND
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high slump-preserving polycarboxylate water reducer, which can effectively solve the problem of serious loss of concrete slump caused by unfavorable factors such as high temperature and long transportation time in Xinjiang

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
  • High-liquidity polycarboxylic acid water reducing agent and preparation method thereof
  • High-liquidity polycarboxylic acid water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Table 1 is the proportioning of embodiment A, B, C, D, E and F

[0012] Table 1

[0013]

[0014] The preparation method of the high slump-retaining polycarboxylate water reducer described in the above-mentioned embodiment A-F comprises the following steps:

[0015] (1) Add the polyether monomer and an appropriate amount of deionized water into the reaction kettle, stir evenly to completely dissolve the polyether monomer in the deionized water, heat up to 60±2°C, and set aside;

[0016] (2) Add sodium bisulfite and ethylene glycol diacetate to step (1), continue stirring for 30 minutes, add azobisisobutyronitrile and sulfamic acid after complete dispersion, heat up to 80±2°C, and react 30min, standby;

[0017] (3) Add chain transfer agent in step (2), chain transfer agent is added in the reactor in 5 times, and the time interval is 10min;

[0018] (4) After adding the chain transfer agent in step (3), continue to react for 3h, then, cool to room temperature, add a...

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 particularly relates to a high-liquidity polycarboxylic acid water reducing agent which comprises 15-20% of polyether monomer, 4-9% of ethylene glycol diacetate, 3-5% of a chain transfer agent, 4-9% of sulfamic acid, 2.5-5.5% of sodium bisulfite, 1-2% of azobisisobutyronitrile, 2-5% of sodium hydroxide and the balance of deionized water. A preparation method for the high-liquidity polycarboxylic acid water reducing agent comprises the following steps: (1), adding the polyether monomer and deionized water into a reaction kettle, uniformly stirring for completely dissolving, and heating to 60+ / - 2 DEG C; (2), adding sodium bisulfate and ethylene glycol diacetate, continuously stirring for 30 min, after complete dispersing, adding azobisisobutyronitrile and sulphamic acid, heating to 80+ / - 2 DEG C and reacting for 30 min; (3), adding the chain transfer agent, wherein the chain transfer agent is added into the reaction kettle for five times at the interval of 10 min; (4), continuously reacting for 3 h, cooling to room temperature, adding deionized water for dissolving sodium hydroxide so as to adjust pH to 7.0; finally, replenishing deionized water, and continuously stirring for 30 min so as to obtain the water reducing agent. By adopting the water reducing agent provided by the invention, the problem that concrete collapses due to high air temperature, long transport time and other factors is solved.

Description

technical field [0001] The invention belongs to the technical field of research and manufacture of concrete admixtures, and in particular relates to a high-collapse polycarboxylate water reducer and a preparation method thereof. technical background [0002] Since the application of polycarboxylate superplasticizer products in Shanghai Maglev Project in 2001 in my country, it can be seen from the use of technology and market that it has developed very rapidly. The application trend of polycarboxylate superplasticizer is from the application of key parts of major projects in the past to general major projects and general engineering applications, and from high-strength grade, special function concrete to general engineering concrete. [0003] Xinjiang is located in the fast-developing area of ​​western construction. Large-scale construction projects have been put into construction. The demand for concrete is increasing, and the demand for corresponding admixtures is also incr...

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): C04B24/32C04B24/16C04B22/14C04B103/30
Inventor 宋勇曾凡付哈妮帕·阿不拉别克王刚唐倩倩
Owner XINJIANG DELAND
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