Influence of Hydrothermal Synthesis Conditions on the Formation of Calcium Silicate Hydrates: from Amorphous to Crystalline Phases
Journal article, 2018

Hydrothermal treatment has been widely applied in the synthesis of well crystalline calcium silicate hydrate (CSH), such as tobermorite and xonotlite. However, both morphology and crystallinity of CSH are greatly affected by the conditions of hydrothermal treatment including siliceous materials, temperature increase rate and isothermal periods. In this study, the influence of hydrothermal conditions on the growth of nano-crystalline CSH was investigated based on XRD analysis. Results showed that siliceous materials with amorphous nature (i e, nano silica powder) are beneficial to synthesize pure amorphous CSH, while the use of more crystallized siliceous materials (i e, diatomite and quartz powder) leads to producing crystalline CSH. Results also indicate that the formation of tobermorite and xonotlite is greatly affected by the temperature rise rate during hydrothermal treatment.

calcium silicate hydrate

structural development

XRD analysis

crystalline

amorphous

hydrothermal synthesis

Author

Wang Shuping

Chongqing University

Peng Xiaoqin

Chongqing University

Luping Tang

Chalmers, Architecture and Civil Engineering, Building Technology

Zeng Lu

Chongqing University

Lan Cong

China West Construct Grp Southwest Co Ltd

Journal Wuhan University of Technology, Materials Science Edition

1000-2413 (ISSN)

Vol. 33 5 1150-1158

Subject Categories

Inorganic Chemistry

Ceramics

Materials Chemistry

DOI

10.1007/s11595-018-1947-0

More information

Latest update

12/17/2018