Influence of Hydrothermal Synthesis Conditions on the Formation of Calcium Silicate Hydrates: from Amorphous to Crystalline Phases
Artikel i vetenskaplig tidskrift, 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.

XRD analysis

hydrothermal synthesis


calcium silicate hydrate

structural development



Wang Shuping

Chongqing University

Peng Xiaoqin

Chongqing University

Luping Tang

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Zeng Lu

Chongqing University

Lan Cong

China West Construction Southwest Group Co., Ltd

Journal Wuhan University of Technology, Materials Science Edition

1000-2413 (ISSN) 1993-0437 (eISSN)

Vol. 33 5 1150-1158


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