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Mostrando ítems 1-20 de 101
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4D nanoimaging of early age cement hydration.
Shirani, Shiva; Cuesta-García, Ana María; Morales-Cantero, Alejandro; Santacruz-Cruz, María Isabel; Díaz, Ana; Trtik, Pavel; Holler, Mirko; Rack, Alexander; Lukic, Bratislav; Brun, Emmanuel; Ruiz Salcedo, Inés; García-Aranda, Miguel Ángel[et al.] (Springer Nature, 2023-05-08)Despite a century of research, our understanding of cement dissolution and precipitation processes at early ages is very limited. This is due to the lack of methods that can image these processes with enough spatial ... -
Accuracy in Rietveld quantitative phase analysis: a comparative study of strictly monochromatic Mo and Cu radiations
León-Reina, Laura; García-Maté, Marta; Álvarez-Pinazo, Gema; Santacruz-Cruz, María Isabel; Vallcorba, Oriol; Gómez-de-la-Torre, María de los Ángeles; García-Aranda, Miguel Ángel[et al.] (Willey online Library, 2016)This study reports 78 Rietveld quantitative phase analyses using Cu K 1, Mo K 1 and synchrotron radiations. Synchrotron powder diffraction has been used to validate the most challenging analyses. From the results for ... -
Activation of LC3 binders by C-S-H nucleation seeding with a new tailored admixture for low-carbon cements.
Cuesta-García, Ana María; Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Mazanec, Oliver; Dalla-Libera, Alessandro; Dhers, Sebastien; Schwesig, Peter; Borralleras, Pere; García-Aranda, Miguel Ángel[et al.] (Ernst & Sohn GmbH, 2023-12-06)The use of supplementary cementitious materials is currently the most favorable strategy for reducing CO2 emissions in cements. Limestone Calcined Clay Cements, LC3, are a type of cement that allows the reduction of CO2 ... -
Activation of LC3 binders by C-S-H nucleation seeding with a new tailored admixture for low-carbon cements.
Cuesta-García, Ana María; Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Manzanec, Oliver; Dalla-Libera, Alessandro; Dhers, Sebastien; Schwesig, Peter; Borralleras, Pere; García-Aranda, Miguel Ángel[et al.] (2023)The use of supplementary cementitious materials is currently the most favorable strategy for reducing CO2 emissions in cements. Limestone Calcined Clay Cements, LC3, are a type of cement that allows the reduction of CO2 ... -
Activation of LC3 low-carbon cements by C-S-H seeding.
Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Cuesta-García, Ana María; Santacruz-Cruz, María Isabel; Mazanec, Oliver; Dalla-Libera, Alessandro; Dhers, Sebastien; Schwesig, Peter; Borralleras, Pere; García-Aranda, Miguel Ángel[et al.] (2023)Portland-based Limestone Calcined Clay Cements (LC3) are attracting a lot of the attention from scholars and field applications due to the reduction in CO2 emissions. However, their low mechanical strengths at early ages ... -
Active Sulpho-belite cements. Hydration mechanisms and mechanical properties
Álvarez-Pinazo, Gema (Servicio de Publicaciones y Divulgación Científica, 2015)The threat of climate change is considered one of the major environmental challenges for our society, where carbon dioxide (CO2) is one of the main Greenhouse gases (GHGs). Every ton of ordinary Portland cement (OPC) ... -
Advanced synchrotron studies of ye'elimite-based cement pastes
García-Aranda, Miguel Ángel; Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel (2018-07-18)Synchrotron characterization techniques [1] are being used to study Portland-based cements and recently also CSA and related cements. A key property of these techniques is that they do not require sample preparation, so ... -
Alite hydration mechanism in presence of ye’elimite related to BAY cements
Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles (2019-10-08)One alternative to decrease CO2 emissions from ordinary Portland Cement (OPC) production consists on the development of a new kind of eco-cements composed by less calcite demanding phases. That is the case of ... -
Alite-belite-ye'elimite cements: Effect of dopants on the clinker phase composition and properties
Zea-Garcia, Jesus D.; García-Aranda, Miguel Ángel; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel (2018-10-30)Clinkers with alite-belite-ye'elimite (ABY) are considered as eco-friendly cements. Clinkering (2 Kg) of two types of ABY clinkers was optimized: standard-ABY, with CaF2 and ZnO as dopants (32.6 wt% alite, 30.4 wt% β-C2S ... -
Aluminum Hydroxide Gel Characterization within a Calcium Aluminate Cement Paste by Combined Pair Distribution Function and Rietveld Analyses
Cuesta-García, Ana María; Ichikawa, Rodrigo U.; Londono-Zuluaga, Diana; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Turrillas, Xavier; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2017-06)There are many commercially important multiphase materials which contain amorphous phases, such as cement pastes, porcelains, glass-ceramics or pharmaceutical compounds. However, the analysis of amorphous phase(s) within ... -
Amorphous determination in calcium sulfoaluminate materials by external and internal methods
García-Maté, Marta; Santacruz-Cruz, María Isabel; Cuesta-García, Ana María; León-Reina, Laura; García-Aranda, Miguel Ángel; Baco, Isabelle; Morin, Vincent; Walenta, Günther; Gartner, Ellis; Gómez-de-la-Torre, María de los Ángeles[et al.] (ICE Publishing, 2014)External standard methodology has been successfully applied to quantify the known amounts of amorphous component that are increasingly added to cement-related materials. The consistency and accuracy of the methodology were ... -
ANALYSIS OF BUILDING MATERIALS BY SYNCHROTRON X-RAY IMAGING
Shirani, Shiva; Cuesta-García, Ana María; Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; García-Aranda, Miguel Ángel[et al.] (-, 2021-01)Building materials have complex hierarchical microstructures. The largest components are coarse aggregates with dimensions larger than a few centimetres and the smallest ones are the calcium silicate hydrate (C-S-H) gel ... -
Aplicación de estrategias de aprendizaje para la adquisición de competencias profesionales y su evaluación mediante una rúbrica integradora en diversos títulos de grado de la Universidad de Málaga
Santacruz-Cruz, María Isabel; Díaz-Ramos, Antonio; López-Guerrero, María del Mar; Aranda-Garrido, María Lourdes; Martin-Valero, Rocio; Ruiz-Párraga, Gema Teresa; Jiménez-Lara, Antonio Jesús; Gutiérrez-Pérez, Antonia[et al.] (2015-07-28)El Espacio Europeo de Educación Superior ha supuesto importantes cambios en el proceso de enseñanza-aprendizaje para la adquisición de competencias transversales y específicas. La calidad es un factor estratégico, por lo ... -
Applications of synchrotron x-ray powder diffraction in hydrated cements: high-resolution and high-pressure studies
Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Popescu, Catalin; García-Aranda, Miguel Ángel (2016-07-12)The main aim of this study is to apply synchrotron radiation techniques for the study of hydrated cement pastes. In particular, the tetracalcium aluminoferrite phase, C4AF in cement nomenclature, is the major iron-containing ... -
Belite calcium sulfoaluminate cement early hydration: citric acid sensitivity.
Koufany, Imane; Santacruz-Cruz, María Isabel; Bescher, Eric P.; García-Aranda, Miguel Ángel; Gómez-de-la-Torre, María de los Ángeles (2023)Three buckets, corresponding to three selected samples, of the same type of belite calcium sulfoaluminate (BCSA) cements have been studied. These cements show very similar elemental and mineralogical compositions, and ... -
C-S-H seeding activation of Portland and Belite cements: An enlightening in situ synchrotron powder diffraction study
Morales-Cantero, Alejandro; Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Mazanec, Oliver; Borralleras, Pere; Weldert, Kai S.; Gastaldi, Daniela; Canonico, Fulvio; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2022-11)C-S-H seeding in Portland cements is well known from basic scientific works and field applications. Moreover, this activation approach could be beneficial for low-CO2 cements under development where a general drawback is ... -
Cementos de arcillas calcinadas y caliza preparados en la Universidad de Málaga
Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Cuesta-García, Ana María; Bernal, Isabel M.R.; Redondo-Soto, Cinthya; Morales-Cantero, Alejandro; Shirani, Shiva; Pérez-Bravo, Raquel; Franco-Duro, Francisco Ignacio; García-Maté, Marta; Salcedo, Inés R.; León-Reina, Laura; García-Aranda, Miguel Ángel[et al.] (2022)Adjuto documento -
Chemistry and Mass Density of Aluminum Hydroxide Gel in Eco-Cements by Ptychographic X-ray Computed Tomography
Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Trtik, Pavel; Da Silva, Julio C.; Díaz, Ana; Holler, Mirko; García-Aranda, Miguel Ángel[et al.] (ACS, 2017)Eco-cements are a desirable alternative to ordinary Portland cements because of their lower CO2 footprints. Some ye’elimite-based ecocements are attracting a lot of interest. Understanding the reasons for the mechanical ... -
Clinkering and early age hydration characterization of Belite-Alite Calcium Sulfoaluminate (BACSA) cements
Londono-Zuluaga, Diana; Álvarez-Pinazo, Gema; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles[et al.] (2015-10-26)In this work, four BACSA clinkers with different compositions (belite ~ 70-55 wt %, alite ~ 10-15 wt % and ye’elimite ~ 10-15 wt %) were synthesized (at laboratory scale). Lime, gypsum, kaolin and sand were used as raw ... -
Clinkering and hydration of belite-ye'elimite-alite cement
Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles (Elsevier, 2017)Some belite-ye´elimite-ferrite (BYF) cements present low mechanical strengths mainly due to the slow reactivity of belite. A solution to this problem may be the activation of BYF clinkers by preparing them with a coexistence ...