Page 112 - Handbook of Thermal Analysis of Construction Materials
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Section 6.0 - Hydration 95
In portland cement, tricalcium silicate is a solid solution containing
minor amounts of oxide and is known as an alite phase. Alites may contain
Al, Mg, and Fe. Several alites were prepared containing Al, Mg, and Fe and
were hydrated for different periods. The degree of hydration was deter-
mined according to the DTA method suggested above. In Fig. 19, the
compressive strengths of these samples are plotted at different degrees of
hydration. [36] Compared to pure C S, Fe-alite gives higher strength at any
3
degree of hydration. This is attributable to the differences in the intrinsic
nature of the hydration products.
Figure 19. Kinetics of hydration of alites.
