聚羧酸分子结构对水泥砂浆早强性能的影响

doi:10.3969/j.issn.1000-565X.2011.08.017

华南理工大学学报（自然科学版） ›› 2011, Vol. 39 ›› Issue (8): 93-98.doi: 10.3969/j.issn.1000-565X.2011.08.017

聚羧酸分子结构对水泥砂浆早强性能的影响

易聪华黄欣张智杨东杰^†

华南理工大学化学与化工学院，广东广州 510640

收稿日期:2011-02-24 修回日期:2011-05-27 出版日期:2011-08-25 发布日期:2011-07-06
通信作者: 杨东杰(1965-)，女，教授，博士，主要从事木质素资源化利用研究．E-mail: cedjyang@scut．edu．cn E-mail:chyi@scut.edu.cn
作者简介:易聪华(1979-) ，女，讲师，博士，主要从事混凝土高效减水剂研发．
基金资助:
广东省科技计划项目( 2008B010600014)

Effects of Molecular Structures of Polycarboxylate on Early-Strength Performance of Cement Mortar

Yi Cong-hua Huang Xin Zhang Zhi Yang Dong-jie

School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China

Received:2011-02-24 Revised:2011-05-27 Online:2011-08-25 Published:2011-07-06
Contact: 杨东杰(1965-)，女，教授，博士，主要从事木质素资源化利用研究．E-mail: cedjyang@scut．edu．cn E-mail:chyi@scut.edu.cn
About author:易聪华(1979-) ，女，讲师，博士，主要从事混凝土高效减水剂研发．
Supported by:
广东省科技计划项目( 2008B010600014)

摘要/Abstract

摘要： 以甲基丙烯酸( MAA) 、甲基丙烯磺酸钠( MAS) 、甲氧基聚乙二醇甲基丙烯酸酯( PMA45) 为共聚单体，以过硫酸铵为引发剂，合成了一系列聚羧酸高效减水剂．通过测定硬化砂浆早期强度以及采用扫描电镜观察早期水泥石形貌，研究了不同原料配比对聚羧酸高效减水剂早强性能的影响．结果表明，聚羧酸高效减水剂早强性能随着PMA45 用量的增加先增大后减小，随着MAA、MAS 用量的增加及减水剂相对分子质量的减小而增大，即具有适中的聚乙二醇侧链密度、较高的羧酸根及磺酸根含量、较低的相对分子质量的聚羧酸分子具有较好的早强性能．

关键词: 聚羧酸, 高效减水剂, 分子结构, 水泥砂浆, 早强性能

Abstract:

A series of polycarboxylate superplasticizers were synthesized with methacrylic acid ( MAA) ,sodium methylacrylamide ( MAS) and methoxy polyethylene glycol methacrylate( PMA45) as monomers,and ammonium persulfate ( APS) as an initiator. Then,the effects of raw material proportion on the early-strength performance of polycarboxylate superplasticizers were investigated by measuring the early strength of harden mortar and by using a scanning electron microscope to observe the morphology of early cement stone. The results show that the earlystrength performance of the superplasticizers first increases and then decreases with the increase of the dosage of PMA45,and increases with the increase of the dosages of MAA and MAS as well as with the decrease of the relative molecular mass of the superplasticizers,which means that the superplasticizers with optimal density of side chain ( polyethyleneglycol) ,high contents of carboxylate and sulfonate,and low relative molecular mass are of excellent early-strength performance.

Key words: polycarboxylate, superplasticizer, molecular structure, cement mortar, early-strength performance

易聪华黄欣张智杨东杰. 聚羧酸分子结构对水泥砂浆早强性能的影响[J]. 华南理工大学学报（自然科学版）, 2011, 39(8): 93-98.

Yi Cong-hua Huang Xin Zhang Zhi Yang Dong-jie. Effects of Molecular Structures of Polycarboxylate on Early-Strength Performance of Cement Mortar[J]. Journal of South China University of Technology (Natural Science Edition), 2011, 39(8): 93-98.

[1]	殷素红, 杨幸霖, 冯献, 等. 不同侧链密度PCE制备的C-S-H/PCE结构及其对水泥早期水化的影响[J]. 华南理工大学学报(自然科学版), 2023, 51(1): 76-83.
[2]	吴笑梅高强刘沙沙黄定策田亚坡樊粤明. 水泥砂浆流变参数的漏斗法测定[J]. 华南理工大学学报（自然科学版）, 2017, 45(11): 86-91.
[3]	楼宏铭张海彬梁悄杨东杰邱学青. 竹浆黑液接枝磺化产物的超滤分级及减水分散性能研究[J]. 华南理工大学学报（自然科学版）, 2010, 38(4): 12-17.
[4]	谢海伟代建国郭勇金刚魏京广张燕 . 鲎素抗菌肽的分子结构稳定性及生物活性[J]. 华南理工大学学报（自然科学版）, 2008, 36(4): 144-150.
[5]	潘莉莎邱学青庞煜霞杨东杰. 砂浆抗渗性和抗压强度的影响因素[J]. 华南理工大学学报（自然科学版）, 2005, 33(7): 47-51.

聚羧酸分子结构对水泥砂浆早强性能的影响

Effects of Molecular Structures of Polycarboxylate on Early-Strength Performance of Cement Mortar

PDF

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 5

编辑推荐

Metrics

本文评价