10. 3969/j. issn. 1674-4764. 2013.02. 025
聚羧酸系超塑化剂分子结构对C3S水化行为的影响刘加平1,2,3俞寅辉1,2 冉千平1,2乔敏1,2,高楠箫1,2
1.江苏省建筑科学研究院有限公司高性能土木工程材料国家重点实验室,南京210008;
2.江苏博特新材料有限公司,南京210008;3.重庆大学材料科学与工程学院,重庆400045
摘 要:采用等温量热仪、热分析、扫描电镜等测试手段,研究了3种聚羧酸系超塑化剂(PCs)对硅酸三钙(C3S)水化行为的影响;采用总有机碳测定了不同分子结构的PCs在C3S颗粒上的吸附动力学。结果表明:PCs的掺入大大增加了C3S的诱导期;减缓了C3S的早期水化,但对水化后期发展有利,其中主链为马来酸酐的PC1对C3S水化3d的减缓作用最强;共聚物大部分残留在孔隙液中,其所含的羧酸根含量与对C3S的减缓作用呈线性关系;对C3S诱导期的增加可能是改变了氢氧化钙的临界饱和度。
聚羧酸系超塑化剂;硅酸三钙;水化;机理
TU528.042.2A1674-4764(2013)02-0153-06
Impact of Molecular Structure of Polycarboxylate Based
Superplasticizer on Hydration Behavior of C3S
Liu Jiaping Yu YinhuiRan QianpingQiao Min Gao Nanxiao
2012-08-21
国家重点基础研究计划(973)项目(2010CB735801),国家自然科学基金(51278232)
刘加平(1967-),男,高级工程师,博士,主要从事混凝土外加剂与耐久性研究,(E-mail)liujiaping@cnjsjk. cn。万方数据
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万方数据
聚羧酸系超塑化剂分子结构对C3S水化行为的影响
作者:刘加平, 俞寅辉, 冉千平, 乔敏, 高楠箫, Liu Jiaping, Yu Yinhui, Ran Qianping, Qiao Min , Gao Nanxiao
作者单位:刘加平,Liu Jiaping(江苏省建筑科学研究院有限公司高性能土木工程材料国家重点实验室,南京
210008;江苏博特新材料有限公司,南京210008;重庆大学材料科学与工程学院,重庆400045), 俞寅辉,冉
千平,乔敏,高楠箫,Yu Yinhui,Ran Qianping,Qiao Min,Gao Nanxiao(江苏省建筑科学研究院有限公司高
性能土木工程材料国家重点实验室,南京210008;江苏博特新材料有限公司,南京210008)
刊名:
土木建筑与环境工程
英文刊名:Journal of Chongqing Jianzhu University
年,卷(期):2013,35(2)
参考文献(15条)
1.Aitcin P-C Cement of yesterday and today:concrete of tomorrow[外文期刊] 2000(09)
2.缪昌文;冉千平;洪锦祥聚羧酸系高性能减水剂的研究现状及发展趋势[期刊论文]-中国材料进展 2009(11)
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5.Winnefeld F;Becker S;Pakusch J Effects of the molecular architecture of comb-shaped superplasticizers on their performance in cementitious systems[外文期刊] 2007(04)
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7.Ran Q P;Liu J P;Miao C W Effect of the side chain length of comb-like copolymer superplasticizer on early hydration properties of concentrated cement suspensions[期刊论文]-Journal of the Chinese Ceramic Society 2010(09)
8.Ran Q P;Liu J P;Miao C W Development of new ultra high early strength superplaticizer and its application 2009
9.Pourchez J;Grosseau P;Ruot B Changes in C3S hydration in presence of cellulose ether[外文期刊] 2010(02)
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11.Jennings H M;Pratt P L An experimental argument for the existence of a protective membrane surrounding Portland cement during the induction period 1979(04)
12.Scrivener K L;Nonat A Hydration of cementitious materials,present and future 2011(07)
13.Juilland P;Gallucci E;Flatt R Dissolution theory applied to the induction period in alite hydration[外文期刊] 2010(06)
14.Plank J;Sachsenhauser B Experimental determination of the effective anionic charge density of polycarboxylate superplasticizers in cement pore solution[外文期刊] 2009(01)
15.Yamada K;Hanehara S Working mechanism of polycarboxylte superplasticizer considering the chemical structure and cement characteristics 2003
引用本文格式:刘加平.俞寅辉.冉千平.乔敏.高楠箫.Liu Jiaping.Yu Yinhui.Ran Qianping.Qiao Min.Gao Nanxiao聚羧酸系超塑化剂分子结构对C3S水化行为的影响[期刊论文]-土木建筑与环境工程 2013(2)