Print Email Facebook Twitter Dehydration kinetics of Portland cement paste at high temperature Title Dehydration kinetics of Portland cement paste at high temperature Author Zhang, Q. Ye, G. Faculty Civil Engineering and Geosciences Department Structural Engineering Date 2012-10-01 Abstract Portland cement paste is a multiphase compound mainly consisting of calcium-silicate-hydrate (CSH) gel, calcium hydroxide (CH) crystal, and unhydrated cement core. When cement paste is exposed to high temperature, the dehydration of cement paste leads to not only the decline in strength, but also the increased pore pressure in the paste. In this article, the dehydration kinetic was characterized in term of the combination of kinetics of CSH and CH. The dehydration kinetics data of cement paste at different heating rates was collected by thermogravimetry. The influence of temperature on the reaction rate is analyzed by Arrhenius equation. The Arrhenius parameters of CSH and CH, activation energy, and pre-exponential factor are determined by isoconversional method. The calculated kinetics parameters were validated by further experimental data finally Subject kineticsdehydrationcement pastehigh temperatureTGisocontroversional method To reference this document use: http://resolver.tudelft.nl/uuid:05aea124-11ff-43d7-9c50-5b16459373ab DOI https://doi.org/10.1007/s10973-012-2303-9 Publisher Springer-Verlag ISSN 1572-8943 Source http://link.springer.com/article/10.1007/s10973-012-2303-9 Source Journal of Thermal Analysis and Calorimetry, 110(1)2012 Part of collection Institutional Repository Document type journal article Rights (c)2012 Zhang, Q., Ye, G., and Springer Files PDF Zhang.pdf 517.96 KB Close viewer /islandora/object/uuid:05aea124-11ff-43d7-9c50-5b16459373ab/datastream/OBJ/view