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dc.contributor.authorFraga, Edmundo
dc.contributor.authorCuesta-Garcia, Ana Maria
dc.contributor.authorZea-Garcia, Jesus D.
dc.contributor.authorGomez-de-la-Torre, Maria de los Angeles 
dc.contributor.authorYañez-Casal, Armando
dc.contributor.authorGarcía-Aranda, Miguel Ángel 
dc.date.accessioned2019-06-17T09:54:15Z
dc.date.available2019-06-17T09:54:15Z
dc.date.created2019
dc.date.issued2019-06
dc.identifier.citationMaterials 2019, 12, 1897en_US
dc.identifier.urihttps://hdl.handle.net/10630/17816
dc.description.abstractOil and gas well cements are multimineral materials that hydrate under high pressure and temperature. Their overall reactivity at early ages is studied by a number of techniques including through the use of the consistometer. However, for a proper understanding of the performance of these cements in the field, the reactivity of every component, in real‐world conditions, must be analysed. To date, in situ high energy synchrotron powder diffraction studies of hydrating oil well cement pastes have been carried out, but the quality of the data was not appropriated for Rietveld quantitative phase analyses. Therefore, the phase reactivities were followed by the inspection of the evolution of non‐overlapped diffraction peaks. Very recently, we have developed a new cell specially designed to rotate under high pressure and temperature. Here, this spinning capillary cell is used for in situ studies of the hydration of a commercial oil well cement paste at 150 bars and 150 °C. The powder diffraction data were analysed by the Rietveld method to quantitatively determine the reactivities of each component phase. The reaction degree of alite was 90% after 7 hours, and that of belite was 42% at 14 hours. These analyses are accurate, as the in situ measured crystalline portlandite content at the end of the experiment, 12.9 wt%, compares relatively well with the value determined ex situ by thermal analysis, i.e., 14.0 wt%. The crystalline calcium silicates forming at 150 bars and 150 °C are also discussed.en_US
dc.description.sponsorshipThis research was funded by Spanish MINECO, grant number BIA2017‐82391‐R which is co‐funded by FEDER. We thank Marc Malfois for his help during the experiment performed at NCD‐SWEET beamline at ALBA synchrotron. We also thank Marcus Paul (Dyckerhoff GmbH) for providing the OWC sample with its characterization and helpful discussions.en_US
dc.language.isoengen_US
dc.publisherMDPI - Publisher of Open Access Journalsen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subject.otherhigh‐pressure equipmenten_US
dc.subject.otherpowder diffractionen_US
dc.subject.othersynchrotron radiationen_US
dc.subject.othercement hydrationen_US
dc.subject.otherreactivityen_US
dc.subject.otheroil well cementen_US
dc.titleRietveld Quantitative Phase Analysis of Oil Well Cement: in Situ Hydration Study at 150 Bars and 150 °Cen_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.centroFacultad de Cienciasen_US
dc.identifier.doi10.3390/ma12121897
dc.rights.ccAttribution-NonCommercial-NoDerivatives 4.0 Internacional*


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