Page 336 - Handbook of Thermal Analysis of Construction Materials

Section 4.0 - Slags 313

Differential Thermal Analysis may be used to monitor hydration
products such as calcium hydroxide in slag cements cured at different
curing temperatures and times. [27] Some results are shown in Fig. 16. [41] The
amount of Ca(OH) is decreased with increasing temperature in slag
2
cements. The Ca(OH) content decreases as the percentage of slag in the
2
mixture is increased. This is due to the consumption of lime by slag during
hydration. This is a dilution effect. There is evidence that the C/S ratio of
the C-S-H phase in the pastes is lower than that in portland cement paste.
DTA also provides information on the type of C-S-H that is produced at
different conditions of curing.

Figure 16. The amount of calcium hydroxide in slag cements as a function of temperature.