Page 153 - Handbook of Thermal Analysis of Construction Materials

136 Chapter 3 - Formation and Hydration

by DTA, TG, SEM (EDX), porosimetry, and chemical analysis. TG
showed a loss in weight at 60°C for the loss of adsorbed water, and other
losses occurred due to the dissociation of C-S-H, Mg(OH) , Ca(OH) , and
2
2
CaCO . The w/c ratio that was used to make concrete did not influence the
3
total amount of combined water. Higher amounts of carbonate were found
in concretes made at lower w/c ratios. It was also concluded that the
transition zone contained C-S-H and Ca(OH) , the relative ratios depending
2
on the type of cement and cement:aggregate: water ratio.

REFERENCES

1. Ramachandran, V. S., Applications of Differential Thermal Analysis in
Cement Chemistry, p. 308, Chemical Publication Co., New York (1969)
2. Ramachandran, V. S., and Garg, S. P., Differential Thermal Analysis as
Applied to Building Science (with an annotated bibliography), p. 182,
Central Building Research Institute, India (1959)
3. Longuet, P., Application of Thermogravimetry to the Chemistry of Cement,
Rev. Materiaux de Construction, 537:538–540 (1960)
4. Mackenzie, R. C., (ed.), Differential Thermal Analysis, 2:607, Academic
Press, London (1972)
5. Ghosh, S. N., (ed.), Advances in Cement Technology, p. 804, Pergamon
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NJ (2001)
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Hydrating Cements by DTA Technique, Thermochimica Acta, 3:343–366
(1972)
8. Bhatty, J. I., Review of Application of Thermal Analysis to Cement-
Admixture Systems, Thermochimica Acta, 189:313–350 (1991)
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Thermal Analysis in Cement Research, Highway Res. Rec., 62:40–61
(1964)
10. Rowland, R. A., and Beck, C. W., Determination of Small Quantities of
Dolomite by Differential Thermal Analysis, Am. Mineralogist, 37:76–82
(1952)
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Industry, p. 497, Akademia Books Int., New Delhi (1997)