The influence of silanes on hydration and strength development of cementitious systems

被引：137

作者：

Kong, Xiang-Ming ^{[1
]}

Liu, Hui ^{[1
,2
]}

Lu, Zhen-Bao ^{[2
]}

Wang, Dong-Min ^{[2
]}

机构：

[1] Tsinghua Univ, Dept Civil Engn, China Educ Minist, Key Lab Civil Engn Safety & Durabil, Beijing 100084, Peoples R China

[2] China Univ Min & Technol, Dept Chem Engn, Beijing 100083, Peoples R China

来源：

CEMENT AND CONCRETE RESEARCH | 2015年 / 67卷

基金：

中国国家自然科学基金; 芬兰科学院;

关键词：

Silane; Cement paste (D); Flowability; Strength; Hydration (A); SILICA FUME; HYDROLYSIS; CONDENSATION; POROSIMETRY; CONCRETE; KINETICS; MORTAR; STEEL;

D O I：

10.1016/j.cemconres.2014.10.008

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The influences of three types of silane (tetraethoxysilane (TEOS), 3-aminopropyltriethoxysilane (APTES), N-2-aminoethyl-3-aminopropyltrimethoxysilane (AEAPTMS)) on flowability, strength development and hydration kinetics of cement pastes and mortars are systematically investigated. Results show that: 1) three silanes exhibit a dispersing effect on cement pastes indicated by the increased flowability of fresh cement pastes, among which AEAPTMS shows the strongest dispersing power; 2) AEAPTMS and APTES retard cement hydration by extending the induction period and reducing the hydration degree at Certain ages determined by isothermal calorimetry, measurements of non-evaporable water amount and portlandite content in hydration products at ages before 90 days; 3) AEAPTMS and APTES show positive effect on the toughness of mortars after 7 day curing; and 4) three silanes act differently on strength growth at various ages, which should be a result that is counterbalanced by their influences on hydration kinetics, pore structure, composition and morphology of hydration products. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：168 / 178

页数：11

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