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Closed Access item Neutron diffraction for studying the influence of the relative humidity on the carbonation process of cement pastes

Authors:Galán, I.
Andrade, C.
Castellote, M.
Rebolledo, Nuria
Sánchez, Javier
Puente Orench, I.
Campo, Javier
Fabelo, Oscar
Issue Date:2011
Publisher:Institute of Physics Publishing
Citation:Journal of Physics: Conference Series 325(1): 012015 (2011)
Abstract:The effect of humidity on hydrated cement carbonation has been studied by means of in-situ neutron diffraction measurements. The evolution of the main crystalline phases in the bulk of the sample, portlandite and calcite, has been monitored during the process. Data obtained from neutron diffraction allow the quantification of the phases involved. The results highlight the great influence of humidity on carbonation. At very low humidity there are almost no changes. Between 53 and 75% relative humidity, portlandite decrease and calcite increase data can be fitted to exponential decay functions. At very high humidity portlandite remains nearly constant while calcite increases slightly with time, almost linearly.
Identifiers:doi: 10.1088/1742-6596/325/1/012015
issn: 1742-6588
e-issn: 1742-6596
Appears in Collections:(ICMA) Artículos
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