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Accelerated carbonation of cement pastes in situ monitored by neutron diffraction

Castellote, M. / Andrade, C. / Turrillas, X. / Campo, J. / Cuello, G.J.

AbstractIn-situ monitoring of the changes that take place in the phase composition of cement pastes during accelerated carbonation (100% CO2) for different binders, has been carried out, by taking Neutron Diffraction patterns in parallel with the carbonation experiments. The variation of the intensity of chosen reflections for each phase along the experiment has been used to monitor concentration changes and has supplied data, in real time, for fractional conversion of different phases (Portlandite, Ettringite and CSH gel) of the hydrated cement pastes. Fitting of these results has allowed to make a qualitative approach to the kinetics of the carbonation of the different phases and extracting conclusions on the microstructural changes that takes place during the carbonation of cement pastes.

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Accelerated carbonation of cement pastes in situ monitored by neutron diffraction

Castellote, M. / Andrade, C. / Turrillas, X. / Campo, J. / Cuello, G.J.

AbstractIn-situ monitoring of the changes that take place in the phase composition of cement pastes during accelerated carbonation (100% CO2) for different binders, has been carried out, by taking Neutron Diffraction patterns in parallel with the carbonation experiments. The variation of the intensity of chosen reflections for each phase along the experiment has been used to monitor concentration changes and has supplied data, in real time, for fractional conversion of different phases (Portlandite, Ettringite and CSH gel) of the hydrated cement pastes. Fitting of these results has allowed to make a qualitative approach to the kinetics of the carbonation of the different phases and extracting conclusions on the microstructural changes that takes place during the carbonation of cement pastes.

Accelerated carbonation of cement pastes in situ monitored by neutron diffraction

Castellote, M. / Andrade, C. / Turrillas, X. / Campo, J. / Cuello, G.J.

AbstractIn-situ monitoring of the changes that take place in the phase composition of cement pastes during accelerated carbonation (100% CO2) for different binders, has been carried out, by taking Neutron Diffraction patterns in parallel with the carbonation experiments. The variation of the intensity of chosen reflections for each phase along the experiment has been used to monitor concentration changes and has supplied data, in real time, for fractional conversion of different phases (Portlandite, Ettringite and CSH gel) of the hydrated cement pastes. Fitting of these results has allowed to make a qualitative approach to the kinetics of the carbonation of the different phases and extracting conclusions on the microstructural changes that takes place during the carbonation of cement pastes.

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Title:

Accelerated carbonation of cement pastes in situ monitored by neutron diffraction

Contributors:

Castellote, M. (author) / Andrade, C. (author) / Turrillas, X. (author) / Campo, J. (author) / Cuello, G.J. (author)

Published in:

Cement and Concrete Research ; 38 ; 1365-1373

Publication date:

2008-07-11

Size:

9 pages

ISSN:

DOI:

https://doi.org/10.1016/j.cemconres.2008.07.002

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Accelerated carbonation , In situ monitoring , Neutron diffraction , Phase analysis , Microstructure changes

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