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In situ tomographic investigation on the early hydration behaviors of cementing systems


Gastaldi, D; Canonico, F; Capelli, L; Boccaleri, E; Milanesio, M; Palin, L; Croce, G; Marone, F; Mader, K; Stampanoni, M (2012). In situ tomographic investigation on the early hydration behaviors of cementing systems. Construction and Building Materials, 29:284-290.

Abstract

The early hydration of three cementing materials has been investigated in situ by Synchrotron X-ray Tomographic Microscopy thanks to an automatic sample exchanger recently integrated at the TOMCAT beamline at the Swiss Light Source in Villigen (CH). Hydration has been investigated by following the three dimensional evolution of pastes up to 12 h, with particular attention to the consumption of anhydrous phases, the formation of hydrates and to changes in microstructure. A lecture key for the interpretation of the tomographic images is proposed, based on the relationship between the linear attenuation coefficient μ-function of the density and elemental composition of each mineral phase- and the corresponding grey tone experimentally observed. Some examples of application of the technique are proposed, such as: a comparison among the reaction kinetics of the three investigated cements, the study of morphological evolution of mineral phases, the analyses of the three-dimensional evolution of the pore network.

Abstract

The early hydration of three cementing materials has been investigated in situ by Synchrotron X-ray Tomographic Microscopy thanks to an automatic sample exchanger recently integrated at the TOMCAT beamline at the Swiss Light Source in Villigen (CH). Hydration has been investigated by following the three dimensional evolution of pastes up to 12 h, with particular attention to the consumption of anhydrous phases, the formation of hydrates and to changes in microstructure. A lecture key for the interpretation of the tomographic images is proposed, based on the relationship between the linear attenuation coefficient μ-function of the density and elemental composition of each mineral phase- and the corresponding grey tone experimentally observed. Some examples of application of the technique are proposed, such as: a comparison among the reaction kinetics of the three investigated cements, the study of morphological evolution of mineral phases, the analyses of the three-dimensional evolution of the pore network.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Biomedical Engineering
Dewey Decimal Classification:170 Ethics
610 Medicine & health
Language:English
Date:2012
Deposited On:23 Jan 2013 12:49
Last Modified:05 Apr 2016 16:19
Publisher:Elsevier
ISSN:0950-0618
Publisher DOI:https://doi.org/10.1016/j.conbuildmat.2011.10.016

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