Influence of foreign ions on calcium silicate hydrate under hydrothermal conditions: A review

被引：36

作者：

Tian, Hongwei ^{[1
]}

Stephan, Dietmar ^{[1
]}

Lothenbach, Barbara ^{[2
]}

Lehmann, Christian ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Civil Engn, D-13355 Berlin, Germany

[2] Empa, Swiss Fed Labs Mat Sci & Technol, Lab Concrete & Construct Chem, CH-8600 Dubendorf, Switzerland

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 301卷

关键词：

Hydrothermal conditions; Calcium silicate hydrate; Ion; Supplementary cementitious material; Transformation; C-S-H; QUARTZ PARTICLE-SIZE; AUTOCLAVED AERATED CONCRETE; HIGH PERFORMANCE CONCRETE; X-RAY-DIFFRACTION; WASTE-DERIVED; 11; MECHANICAL-PROPERTIES; CRYSTAL CHEMISTRY; HYDROGARNET FORMATION; INORGANIC ADMIXTURES;

D O I：

10.1016/j.conbuildmat.2021.124071

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Cementitious materials have long been used also in hydrothermal conditions, where hydration is significantly different from ambient temperature conditions. The high temperature accelerates mineral dissolution, especially of supplementary cementitious materials (SCMs). This paper reviews the influence of the foreign ions Al3+, Na+, K+, Mg2+, Fe3+ and SO42- dissolved from SCMs and cement clinkers as well as the Ca/Si ratio on the hydration kinetics, including the formation of amorphous C-S-H and its transformation into crystalline phases, and hydrates characteristics under hydrothermal conditions. When SCMs are present under hydrothermal conditions, in addition to the physical parameters, the chemical and mineralogical compositions of the SCMs considerably influences the types and amounts of hydrates. Therefore, the compositions of mixtures can be optimised in order to control the formation rate and sequence of hydrates and their properties. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：16

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