Application of Polycarboxylate Superplasticizer in the Concrete

2017 ◽  
Vol 898 ◽  
pp. 2076-2080 ◽  
Author(s):  
Xing Qi Huang ◽  
Xiao Rong Li ◽  
Da Wei Zhang ◽  
Chang Jun Xue ◽  
Ai Qin Zhang
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Molecular Design ◽  
High Water ◽  
Repulsive Force ◽  
Reducing Agent ◽  
Functional Design ◽  
Agent Based ◽  
Type Water ◽  
Low Dosage

Compared with the traditional water reducer, polycarboxylicwater-reducing agent exhibits the advantages of high water-reducing rate, cement paste fluidity and low slump loss, etc. The structure of polycarboxylates water reducing agent molecular is comb type. Water reducing agent can be used in the molecular design because it has high water reducing rate, low dosage, good slump stability, and have great potential in increase strength. In recent years, it has attracted many researchers' attention. Water reducing agent can block or destroy cement granular flocculation structure, through the surface function, complexation, electrostatic repulsion force and stereo repulsive force. Research on water reducing agent based on the application of poly carboxylic acid can realize functional design of water reducing agent, so as to promote the development of high-performance concrete.

Synthesis and Properties of Polycarboxylate-Type High Range Water-Reducer

2006 ◽  
Vol 302-303 ◽  
pp. 218-222
Author(s):  
Chong Zhi Li ◽  
Nai Qian Feng ◽  
Xian Fu Han ◽  
Lai-Jun Lu
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Molecular Design ◽  
High Strength ◽  
Vinyl Monomer ◽  
High Durability ◽  
Carboxylic Groups ◽  
Type Water ◽  
Carboxylic Esters ◽  
High Range

A series of polycarboxylate-type water-reducers (MPCs) had been developed and tested. Through molecular design, macromers of polyethylene glycol unsaturated carboxylic esters, and other derivative of unsaturated vinyl monomer containing the carboxylic groups，sulphonic groups， graft groups of alkyleneglycol was introduced as the chemical structure unit of MPCs. The copolymers MPC-2 contained long and short PEO chains and ionic groups, possessed a high dispersing and good slump retaining behavior. Therefore, MPCs can be used as high range water-reducers to prepare high-flowing concrete, high-strength high performance concrete and high-durability concrete.

Research and Applying Evolution of High Efficient Water-Reducing Agent for High Performance Concrete

2012 ◽  
Vol 610-613 ◽  
pp. 573-576
Author(s):  
Zheng Jun Wang ◽  
Jia Bin Liang
Keyword(s):  
High Performance ◽  
Lightweight Concrete ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
High Strength ◽  
Reducing Agent ◽  
Mass Concrete ◽  
Green Concrete ◽  
High Efficient ◽  
Strength And Durability

This paper discusses the development of water-reducing agent and the present situation of the application of high performance concrete. The traditional concrete will be substituted by high performance concrete, green concrete. In the course of appearance of high performance and green, concrete admixtures plays an extremely important role. Concrete water-reducing agent is admixture of the main part. In the case of keeping liquidity, it can make water consumption reduce, so the concrete strength and durability can be improved. It is applicable to all kinds of industrial and civil construction engineering, and it can be applied to different strength grade of concrete. It has important significance for mass concrete engineering, marine building facilities, and component and product of high strength lightweight concrete.

The High Performance Concrete Curing Agent Based on Polyacrylic Emulsion with Hydroxyl Monomer HPMA

2014 ◽  
Vol 584-586 ◽  
pp. 1126-1129 ◽  
Author(s):  
Rui Wang ◽  
Lei Li ◽  
Hong Song Wang ◽  
Wen Bin Wang ◽  
Wei Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Water Retention ◽  
High Performance Concrete ◽  
Retention Rate ◽  
Structural Parameters ◽  
Positive Influence ◽  
Hydroxyl Groups ◽  
Curing Agent ◽  
Agent Based ◽  
Chemical Structures

The influence of the chemical structures of styrene/butyl acrylate/hydroxyl propyl methacrylate emulsion on some properties of ordinary Portland cement concretes has been investigated as concrete curing agent. The structural parameters that are varied included the fractions of HPMA and the polymer structure of the shell-core. The result of the study showed that the hydroxyl monomer HPMA played an important role on the improvement of water retention and the optimal proportion is about 5 wt% of the polymer. In addition, the shell-core structure of the emulsion with HPMA located in shell polymer can further enhance the water-retention rate. Besides, the emulsion with hydroxyl groups could smooth the surface of the concrete, inhibit the carbonation and had positive influence on the compressive strength.

Comparative Study on the Application of Naphthalene Water-Reducing Agent and Polycarboxylate Water-Reducing Agent in High-Performance Concrete

2011 ◽  
Vol 217-218 ◽  
pp. 522-526 ◽  
Author(s):  
Lin Gao ◽  
Yan Shi ◽  
Guo Qiang Xu
Keyword(s):  
Growth Rate ◽  
Comparative Study ◽  
Cement Paste ◽  
High Performance ◽  
High Performance Concrete ◽  
Cement Mortar ◽  
Reducing Agent

We respectively conduct performance contrast test on cement paste, cement mortar, and high-performance concrete which have been added naphthalene water-reducing agent and polycarboxylate water-reducing agent. Studies show that naphthalene water-reducing agent can better improve the performance of concrete and increase the fluidity of concrete to ensure its keeping slump. Meanwhile, the age strength and the growth rate of strength of concrete with mixing polycarboxylate water-reducing agent has been significantly improved than those of naphthalene water-reducing agent, which can better meet the strength requirements of concrete and get a bright application prospect that naphthalene water-reducing agent can not reach.

Sign in / Sign up

Export Citation Format

Share Document