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

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...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2011-10, Vol.325 (1), p.012015-4
Main Authors: Galan, I, Andrade, C, Castellote, M, Rebolledo, N, Sanchez, J, Toro, L, Puente, I, Campo, J, Fabelo, O
Format: Article
Language:English
Subjects:
Calcite
Carbonation
Cement paste
Cements
Constants
Humidity
Neutron diffraction
Neutrons
Phases
Physics
Relative humidity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/325/1/012015