A Study on the Hydration of Portland Limestone Cement by Means of TG |
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| Authors: | S. Tsivilis G. Kakali E. Chaniotakis A. Souvaridou |
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| Affiliation: | (1) Chemical Engineering Department, Labs of Inorganic and Analytical Chemistry, National Technical University of Athens, 9 Heroon Polytechniou St., 15773 Athens, Greece;(2) Department of Research & Development, TITAN Cement Company S.A., Kamari Plant Viotias, P.O. Box 18, 19200 Elefsis, Greece |
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| Abstract: | Subject of this paper is to investigate the hydration process of Portland limestone cement containing 10-35% limestone. Cements, produced by co-grinding of clinker, limestone and gypsum, were hydrated for periods 6 h to 28 d and were studied by means of TG and XRD. The Ca(OH)2 content of the cements containing limestone is higher than in pure cements, specifically for 10% limestone content and ages more than 1 day. These results are in accordance with the strength development of the studied cements. In earlier ages the Ca(OH)2 content is slightly lower in the limestone cements and independent of the limestone content. After 1 day curing, the increase of limestone addition causes a relative increase of the non evaporable water. The XRD patterns indicated the presence of carboaluminates in the hydrated limestone cements. This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | calcium hydroxide hydration limestone cement non evaporable water TG |
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