Gypsum board reaction kinetics at elevated temperatures

Kontogeorgos, DA; Founti, MA

dc.contributor.author	Kontogeorgos, DA	en
dc.contributor.author	Founti, MA	en
dc.date.accessioned	2014-03-01T02:09:17Z
dc.date.available	2014-03-01T02:09:17Z
dc.date.issued	2012	en
dc.identifier.issn	00406031	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29792
dc.subject	Arrhenius parameters	en
dc.subject	Decomposition	en
dc.subject	Dehydration	en
dc.subject	Gypsum board	en
dc.subject	Solid kinetics	en
dc.subject	Thermochemistry	en
dc.subject.other	Arrhenius parameters	en
dc.subject.other	Chemically bound water	en
dc.subject.other	Elevated temperature	en
dc.subject.other	Gypsum board	en
dc.subject.other	Inert atmospheres	en
dc.subject.other	Initial composition	en
dc.subject.other	Mass and energy balance	en
dc.subject.other	Methodological approach	en
dc.subject.other	Model free	en
dc.subject.other	Model-fitting approach	en
dc.subject.other	Non-isothermal condition	en
dc.subject.other	Reaction energy	en
dc.subject.other	Decomposition	en
dc.subject.other	Dehydration	en
dc.subject.other	Deionized water	en
dc.subject.other	Dewatering	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Experiments	en
dc.subject.other	Gypsum	en
dc.subject.other	Kinetics	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Thermochemistry	en
dc.subject.other	Atmospheric temperature	en
dc.title	Gypsum board reaction kinetics at elevated temperatures	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.tca.2011.11.014	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.tca.2011.11.014	en
heal.publicationDate	2012	en
heal.abstract	The scope of this work is to provide a framework that can facilitate the detailed simulation of gypsum board thermo-chemistry at ambient and elevated temperature conditions. The paper reviews gypsum board thermo-chemistry, presents a methodological approach for the calculation of composition and reaction energy, and focuses on methods calculating the 'kinetic triplet'. The chemical kinetics of three main reactions that take place when a gypsum board is exposed at elevated temperatures: evaporation of free moisture content, dehydration of chemically bound water and crystal mesh reorganization were investigated using Differential Scanning Calorimetry measurements under non isothermal conditions and in an inert atmosphere. Experiments using samples of deionized water and commercial gypsum board were carried out at temperatures up to 600°C, with different heating rates. Mass and energy balance equations were considered in order to define the initial composition of a gypsum board and the energy that is absorbed/produced after the completion of the examined reactions. Model-free and model-fitting approaches were used for the definition of the kinetic parameters of the examined reactions. The approach minimizes the need for expensive and detailed experiments necessary for the determination of the gypsum board behavior at elevated temperatures. © 2011 Elsevier B.V. All rights reserved.	en
heal.journalName	Thermochimica Acta	en
dc.identifier.doi	10.1016/j.tca.2011.11.014	en
dc.identifier.volume	529	en
dc.identifier.spage	6	en
dc.identifier.epage	13	en