Listar QICM - Artículos por autor "Gómez-de-la-Torre, María de los Ángeles"
Mostrando ítems 1-20 de 73
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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 ... -
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 ... -
Alternative non-Portland binders
Hanein, Theodore; Gómez-de-la-Torre, María de los Ángeles; Zhang, Zuhua; Provis, John L. (Mineralogical Society of America, 2022)
A background on non-Portland cementitious binders is presented, followed by a review of the key alternative binders that are currently of interest. The mineralogy of these cements is described, along with phases present ... -
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 ... -
Aluminum-rich belite sulfoaluminate cements: clinkering and early age hydration
Martín-Sedeño, M. Carmen; Cuberos, Antonio J.M.; Gómez-de-la-Torre, María de los Ángeles; Álvarez-Pinazo, Gema; Ordónez, Luis M.; Gateshki, Milen; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2009)
Belite sulfoaluminate (BSA) cements have been proposed as environmentally friendly building materials, as their production may release up to 35% less CO2 into the atmosphere when compared to ordinary Portland cements. ... -
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 ... -
Assessment of the quantitative accuracy of Rietveld/XRD analysis of crystalline and amorphous phases in fly ash
Zhao, Piqi; Liu, Xianping; Gómez-de-la-Torre, María de los Ángeles; Lu, Lingchao; Sobolev, Konstantin (2017)
An internal standard method based on Rietveld/XRD whole-pattern fitting analysis of fly ash is used to assess the quantitative accuracy to determine its crystalline and amorphous phases under various conditions such as ... -
Belite hydration at high temperature and pressure by in situ synchrotron powder diffraction
Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Cuesta-García, Ana María; Fraga-López, Edmundo; Shirani, Shiva; García-Aranda, Miguel Ángel[et al.] (2020-10-16)
Portland cements are currently used as Oil‐Well‐Cements for the sheath between the metal casing and the borehole. At high pressures and temperatures, the resulting C-S-H gel(s) is partly unstable and it can react to give ... -
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 ... -
Calcium aluminate cement conversion analysed by ptychographic nanotomography
Shirani, Shiva; Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles; Díaz, Ana; Trtrik, Pavel; Holler, Mirko; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2020-08-17)
Calcium 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 ... -
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 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 ... -
A comparative study of experimental configurations in synchrotron pair distribution function
Zea-Garcia, Jesus D.; Gómez-de-la-Torre, María de los Ángeles; García-Aranda, Miguel Ángel; Cuesta-García, Ana María (MDPI - Publisher of Open Access Journals, 2019-04-25)
The identification and quantification of amorphous components and nanocrystalline phases with very small crystal sizes, smaller than ~3 nm, within samples containing crystalline phases is very challenging. However, this ... -
Difracción de rayos-x (DRX) y cementos: desde la investigación hasta el control de calidad
García-Maté, Marta; Gómez-de-la-Torre, María de los Ángeles; García-Aranda, Miguel Ángel (2019-06-20)
Los materiales de construcción son componentes complejos de gran interés comercial. Por ello, el conocimiento cuantitativo de su mineralogía a través de la difracción de rayos X (DRX) es de crucial importancia para optimizar ... -
Early hydration of belite-ye’elimite-ferrite cements: Role of admixtures
Pérez-Bravo, Raquel; Morales-Cantero, Alejandro; Cuesta-García, Ana María; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles[et al.] (sciencedirect, 2023)
The effect of TIPA and CaCl2 on early hydration, i.e. 24 h, of a B-BYF cement has been studied by in situ synchrotron X-ray powder diffraction, calorimetry, thermal analysis, NMR, and rheological measurements of the pastes ... -
Early-age reactivity of calcined kaolinitic clays in LC3 cements: a multitechnique investigation including pair distribution function analysis
Bernal, Isabel M.R.; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles; Cuesta-García, Ana María (Taylor & Francis, 2022-09)
Limestone Calcined Clay Cements, LC3, allows CO2 emissions savings up to 40%. The resulting binders have competitive mechanical performances after a week. However, the reactivity of LC3 at early ages is slow and should be ... -
Effect of boron and water-to-cement ratio on the performances of laboratory prepared Belite-Ye'elimite-Ferrite (BYF) cements
Pérez-Bravo, Raquel; Morales-Cantero, Alejandro; Bruscolini, Marguerita; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles[et al.] (2021)
The effect of superplasticiser, borax and the water-to-cement ratio on BYF hydration and mechanical strengths has been studied. Two laboratory-scale BYF cements—st-BYF (with -C2S and orthorhombic C4A3 S) and borax-activated ... -
Effect of calcium sulfate source on the hydration of calcium sulfoaluminate eco-cement
García-Maté, Marta; Gómez-de-la-Torre, María de los Ángeles; León-Reina, Laura; Ramírez-Losilla, Enrique; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel[et al.] (2014)
The availability of cements, including eco-cements, with tailored mechanical properties is very important for special applications in the building industry. Here we report a full study of the hydration of calcium sulfoaluminate ... -
Effect of Microencapsulated Phase Change Materials on the Flow Behavior of Cement Composites
García Sanfélix, Susana; Santacruz-Cruz, María Isabel; Szczotok, Anna M.; Belloc, Luis Miguel O.; Gómez-de-la-Torre, María de los Ángeles; Kjøniksen, Anna-Lena[et al.] (2019)
Microencapsulated phase change materials (MPCMs) were incorporated into cement pastes of Portland cement (PC). Minislump tests and rheological properties of cement pastes containing three MPCMs with different surfaces ...