Page 144 - Handbook of Thermal Analysis of Construction Materials

128 Chapter 3 - Formation and Hydration

concentration of above 22%, the strength of concrete is reduced and salt
scaling is increased. [81] The DTA method has been used to determine the
reduction in Ca(OH) content and increase in the content of complex
2
C A•CaCl •10H O, depending on the exposure conditions and severity of
3 2 2
attack. The existence of a complex salt, CaCl •Ca(OH) •10H O, with a
2
2
2
characteristic peak at 580°C was also confirmed.

Figure: 39. Length changes of air-entrained cement paste saturated with brine of various
concentrations.