Dehydration Process of Calcium Silicate Hydrate during Heating in the Air

Abstract:

Investigation on the continuous dehydration process of calcium silicate hydrate with C/S 1.5 during heating in the air was carried out. Results showed that the heating at 200°C of C-S-H resulted in decreasing basal spacing from 1.2 nm to 1.0 nm, and the basal spacing disappeared as the temperature raised to 400°C. Small amount of the dehydrated calcium silicate hydrate, portlandite and calcite were detectable in the heated sample at 400°C. The phases in the samples heated at 500°C and 650°C are β-C₂S, quartz, and calcite. At 800°C and 900°C, α′-C₂S, β-C₂S, and quartz are main phases in the heated sample.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 785-788
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.785
• Online since: July 2011
• Authors: Lin Nu Lu, Shu Mei Yu, Yong Jia He, Shu Guang Hu
• Keywords: Calcium Silicate Hydrate, C-S-H, Dehydration, Heating, β-c₂S

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