CCT diagrams of tricalcium silicate

In situ synchrotron XRD measurements during solidification of a melt in the CaO–SiO2 system using an aerodynamic levitation system

“…No signs for Ca 3 SiO 5 decomposition were observed in the experiments. This is consistent with the literature since according to Tenório et al (2007) a cooling rate of 0.5 • C min −1 (0.008 • C s −1 ) is required for a complete decomposition. For a cooling rate of 10 • C min −1 (0.16 • C s −1 ) less than 20 % decomposition of Ca 3 SiO 5 was observed (Tenório et al 2007).…”

“…This is consistent with the literature since according to Tenório et al (2007) a cooling rate of 0.5 • C min −1 (0.008 • C s −1 ) is required for a complete decomposition. For a cooling rate of 10 • C min −1 (0.16 • C s −1 ) less than 20 % decomposition of Ca 3 SiO 5 was observed (Tenório et al 2007). In this experiment, the slowest average cooling rate was 60 • C min −1 (1 • C s −1 ).…”

Stability of Tricalcium Silicate and Other Primary Phases in Portland Cement Clinker

“…Woermann 13 observed the spontaneous decomposition of iron-saturated C 3 S at 1183 °C. Tenoŕio et al 14,15 also found that both pure alite powder and alites mixed with Fe 2 O 3 and Al 2 O 3 (they were added as a separate phase) easily decomposed when slowly cooled in a manner prescribed by a continuous cooling transformation (CCT) diagram. Most of the pioneering experiments in the field utilized laboratorysynthesized alites.…”

“…The disagreement in these measurements is mainly due to the complexity of the industrial clinker system, where the rate of C 3 S decomposition is often affected by the presence of impurities in the clinker. 2,11,12,14,15,23 The decomposition range of alite was tested with another industrial clinker with a similar result; more details have been made available in Supporting Information pages S3 and S4.…”