Dynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials

Abstract The dynamics of water confined in cement materials is still a matter of debate in spite of the fact that water has a major influence on properties such as durability and performance. In this study, we have investigated the dynamics of water confined in Portland cement (OPC) at different cur...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Guido Goracci, Manuel Monasterio, Helen Jansson, Silvina Cerveny
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e76b1f3e570545c5a60e3b87f29ba67d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:e76b1f3e570545c5a60e3b87f29ba67d
record_format	dspace
spelling	oai:doaj.org-article:e76b1f3e570545c5a60e3b87f29ba67d2021-12-02T12:32:27ZDynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials10.1038/s41598-017-08645-z2045-2322https://doaj.org/article/e76b1f3e570545c5a60e3b87f29ba67d2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08645-zhttps://doaj.org/toc/2045-2322Abstract The dynamics of water confined in cement materials is still a matter of debate in spite of the fact that water has a major influence on properties such as durability and performance. In this study, we have investigated the dynamics of water confined in Portland cement (OPC) at different curing ages (3 weeks and 4 years after preparation) and at three water-to-cement ratios (w/c, 0.3, 0.4 and 0.5). Using broadband dielectric spectroscopy, we distinguish four different dynamics due to water molecules confined in the pores of different sizes of cements. Here we show how water dynamics is modified by the evolution in the microstructure (maturity) and the w/c ratio. The fastest dynamics (processes 1 and 2, representing very local water dynamics) are independent of water content and the degree of maturity whereas the slowest dynamics (processes 3 and 4) are dependent on the microstructure developed during curing. Additionally, we analyze the differences regarding the water dynamics when confined in synthetic C-S-H gel and in the C-S-H of Portland cement.Guido GoracciManuel MonasterioHelen JanssonSilvina CervenyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Guido Goracci Manuel Monasterio Helen Jansson Silvina Cerveny Dynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials
description	Abstract The dynamics of water confined in cement materials is still a matter of debate in spite of the fact that water has a major influence on properties such as durability and performance. In this study, we have investigated the dynamics of water confined in Portland cement (OPC) at different curing ages (3 weeks and 4 years after preparation) and at three water-to-cement ratios (w/c, 0.3, 0.4 and 0.5). Using broadband dielectric spectroscopy, we distinguish four different dynamics due to water molecules confined in the pores of different sizes of cements. Here we show how water dynamics is modified by the evolution in the microstructure (maturity) and the w/c ratio. The fastest dynamics (processes 1 and 2, representing very local water dynamics) are independent of water content and the degree of maturity whereas the slowest dynamics (processes 3 and 4) are dependent on the microstructure developed during curing. Additionally, we analyze the differences regarding the water dynamics when confined in synthetic C-S-H gel and in the C-S-H of Portland cement.
format	article
author	Guido Goracci Manuel Monasterio Helen Jansson Silvina Cerveny
author_facet	Guido Goracci Manuel Monasterio Helen Jansson Silvina Cerveny
author_sort	Guido Goracci
title	Dynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials
title_short	Dynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials
title_full	Dynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials
title_fullStr	Dynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials
title_full_unstemmed	Dynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials
title_sort	dynamics of nano-confined water in portland cement - comparison with synthetic c-s-h gel and other silicate materials
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e76b1f3e570545c5a60e3b87f29ba67d
work_keys_str_mv	AT guidogoracci dynamicsofnanoconfinedwaterinportlandcementcomparisonwithsyntheticcshgelandothersilicatematerials AT manuelmonasterio dynamicsofnanoconfinedwaterinportlandcementcomparisonwithsyntheticcshgelandothersilicatematerials AT helenjansson dynamicsofnanoconfinedwaterinportlandcementcomparisonwithsyntheticcshgelandothersilicatematerials AT silvinacerveny dynamicsofnanoconfinedwaterinportlandcementcomparisonwithsyntheticcshgelandothersilicatematerials
_version_	1718394070195240960

Dynamics of nano-confined water in Portland cement - comparison with synthetic C-S-H gel and other silicate materials

Ejemplares similares