Mostrar el registro sencillo del ítem

dc.contributor.authorShirani, Shiva
dc.contributor.authorCuesta, Ana
dc.contributor.authorDe la Torre, Angeles G.
dc.contributor.authorDiaz, Ana
dc.contributor.authorTrtrik, Pavel
dc.contributor.authorHoller, Mirko
dc.contributor.authorAranda, Miguel A. G.
dc.date.accessioned2020-10-15T12:44:17Z
dc.date.available2020-10-15T12:44:17Z
dc.date.created2020
dc.date.issued2020-08-17
dc.identifier.citationCement and Concrete Research 137 (2020) 106201en_US
dc.identifier.urihttps://hdl.handle.net/10630/19991
dc.description.abstractCalcium aluminate cements are used for special applications but are nowadays banned for general structural purposes due to the calcium aluminate hydrate conversion, that has led, for concretes fabricated with high water contents, to building collapses. The stoichiometries of these conversion chemical reactions are relatively well established but the consequences in porosity, key to predict durability, were unknown. Here, we have used hard X-ray ptychographic nanotomography to study the hydration of CaAl2O4 at different temperatures and chiefly, at 4ºC and then at 50ºC to provoke conversion similar to field conditions. The mass densities of the resulting Al(OH)3 gels were 1.94, 1.98 and 2.23 g.cm-3, for samples hydrated at 4, 20 and 50ºC, respectively. These values are lower than that of gibbsite, 2.42 g.cm-3. Above all, this 3D imaging technique has allowed measuring the secondary water porosity developed in the conversion, which has an average pore dimension close to 140 nm.en_US
dc.description.sponsorshipFinancial support from BIA2017-82391-R research grant, which is co-funded by FEDER, is gratefully acknowledged.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.ispartofseries137;106201
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectCemento-Aditivosen_US
dc.subjectCemento-Densidaden_US
dc.subjectConstrucciónen_US
dc.subject.otherCAC conversionen_US
dc.subject.otherVolume stabilityen_US
dc.subject.otherDensity measurementen_US
dc.subject.otherX-ray synchrotron imagingen_US
dc.subject.otherMesoscaleen_US
dc.titleCalcium aluminate cement conversion analysed by ptychographic nanotomographyen_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.centroFacultad de Cienciasen_US
dc.identifier.doi10.1016/j.cemconres.2020.106201
dc.rights.ccAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.ccAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.ccAttribution-NonCommercial-NoDerivatives 4.0 Internacional*


Ficheros en el ítem

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem

Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Excepto si se señala otra cosa, la licencia del ítem se describe como Attribution-NonCommercial-NoDerivatives 4.0 Internacional