Listar QICM - Artículos por título
Mostrando ítems 1-20 de 149
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2D Corrugated Magnesium Carboxyphosphonate Materials: Topotactic Transformations and Interlayer “Decoration” with Ammonia
Demadis, Konstantinos D.; Famelis, Nikos; Cabeza-Diaz, Aurelio
; G. Aranda, Miguel Ángel; Perez-Colodrero, Rosario Mercedes; Infantes-Molina, Antonia[et al.] (American Chemical Society, 2012-06-29)
In this paper we report the synthesis and structural characterization of the 2D layered coordination polymer Mg(BPMGLY)(H2O)2 (BPMGLY = bis-phosphonomethylglycine, (HO3PCH2)2N(H)COO2−). The Mg ion is found in a slightly ... -
4D nanoimaging of early age cement hydration.
Shirani, Shiva; Cuesta-Garcia, Ana Maria; Morales-Cantero, Alejandro; Santacruz-Cruz, Maria Isabel; Diaz, 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 ... -
A Self-Folding Polymer Film Based on Swelling Metal–Organic Frameworks
Troyano, Javier; Carné-Sánchez, Arnau; Pérez-Carvajal, Javier; León-Reina, Laura; Imaz, Inhar; Cabeza-Diaz, Aurelio; Maspoch, Daniel[et al.] (Wiley-VCH Verlag GmbH & Co., 2018-10-23)
Herein, we exploit the well-known swelling behaviour of metal–organic frameworks (MOFs) to create a selffolding polymer film. Namely, we show that incorporating crystals of the flexible MOF MIL-88A into a polyvinylidene ... -
Accuracy in Cement Hydration Investigations: Combined X-ray Microtomography and Powder Diffraction Analyses
Salcedo, Inés R.; Cuesta-Garcia, Ana Maria; Shirani, Shiva; León-Reina, Laura; García-Aranda, Miguel Ángel (MDPI, 2021-11-17)
Cement hydration is a very complex set of processes. The evolution of the crystalline phases during hydration can be accurately followed by X-ray powder diffraction data evaluated by the Rietveld method. However, accurate ... -
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, Maria Isabel; Vallcorba, Oriol; Gomez-de-la-Torre, Maria de los Angeles; 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 ... -
Alite-belite-ye'elimite cements: Effect of dopants on the clinker phase composition and properties
Zea-Garcia, Jesus D.; García-Aranda, Miguel Ángel; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria 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; Gomez-de-la-Torre, Maria de los Angeles; 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-Garcia, Ana Maria; Ichikawa, Rodrigo U.; Londono-Zuluaga, Diana; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria 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; Gomez-de-la-Torre, Maria de los Angeles; 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, Maria Isabel; Cuesta-Garcia, Ana Maria; León-Reina, Laura; García-Aranda, Miguel Ángel; Baco, Isabelle; Morin, Vincent; Walenta, Günther; Gartner, Ellis; Gomez-de-la-Torre, Maria de los Angeles[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 ATR-FTIR spectroscopy with multivariate analysis to investigate the binding mechanisms of Ag and TiO2 nanoparticles to Chelex®-100 or Metsorb™ for the DGT technique
Pouran, Hamid; Perez-Colodrero, Rosario Mercedes; Wu, Shuang; Hix, Gary B.; Zakharova, Julia; Zhang, Hao[et al.] (The Royal Society of Chemistry, 2020-01-09)
Studying nanomaterials' ecotoxicology is not new but there are still gaps in our understanding of their fate in the environment. A major challenge is lack of reliable tools to measure available concentrations of nanoparticles ... -
Assessment of the quantitative accuracy of Rietveld/XRD analysis of crystalline and amorphous phases in fly ash
Zhao, Piqi; Liu, Xianping; Gomez-de-la-Torre, Maria de los Angeles; 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 cements and their activation
Cuesta-Garcia, Ana Maria; Ayuela, Andres; García-Aranda, Miguel Ángel (Elsevier, 2020-11)
Belite cements, BCs, containing mainly belite, alite and calcium aluminates, are currently used as low heat cements. These binders produce high amounts of C–S–H gel and have very good durability properties which are reviewed. ... -
Belite clinkers with increasing aluminium content: effect of calcium aluminates on calcium silicate hydration
(Elsevier, 2022)Belite cements (BCs) could have advantages over Portland cements concerning durability, low heat development and the use of less demanding raw materials. The activation of BCs by sulfur addition at the clinkering stage and ... -
Belite hydration at high temperature and pressure by in situ synchrotron powder diffraction
Morales-Cantero, Alejandro; Gomez-de-la-Torre, Maria de los Angeles; Cuesta-Garcia, Ana Maria; 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 ... -
Bimetallic Niobium-Based Catalysts Supported on SBA-15 for Hydrodeoxygenation of Anisole
Ballesteros-Plata, Daniel; Barroso-Martín, Isabel; Medina Cervantes, Juan Andrés; Maciel, Carmen; Huirache-Acuña, Rafael; Rodriguez-Castellon, Enrique; Infantes-Molina, Antonia[et al.] (ACS, 2021-12-17)
The effect of adding iron, cobalt or nickel to a prepared niobium-supported catalyst using mesoporous silica SBA-15 as a support was evaluated in the hydrodeoxygenation (HDO) reaction of anisole, chosen as a model compound ... -
Boosting the Performance of La0.8Sr0.2MnO3-δ Electrodes by The Incorporation of Nanocomposite Active Layers
Zamudio-García, Javier; Caizán Juanarena, Leire; Porras-Vazquez, Jose Manuel; Losilla, Enrique R.; Marrero-López, David (Wiley, 2022-07-07)
The use of active layers is a promising strategy to improve the properties of air electrodes for solid oxide fuel cells (SOFCs). In this work, La0.8Sr0.2MnO3-δ is combined with different oxide ion conductors Ce0.9Gd0.1O1.95, ... -
“Breathing” in Adsorbate-Responsive Metal Tetraphosphonate Hybrid Materials
Perez-Colodrero, Rosario Mercedes; Cabeza-Diaz, Aurelio; Olivera-Pastor, Pascual; Infantes-Molina, Antonia; Barouda, Eleni; Demadis, Konstantinos D.; G. Aranda, Miguel Ángel[et al.] (Wiley-VCH Verlag GmbH&Co. KGaA, Weinheim, 2009-05-28)
The structures of various layered calcium tetraphosphonates (CaH6DTMP; H8DTMP=hexamethyl- tetrakis(methylenephosphonic acid)), have been determined. Starting from CaH6DTMP·2H2O, thermal treatment and subsequent exposure ... -
C-S-H seeding activation of Portland and Belite cements: An enlightening in situ synchrotron powder diffraction study
Morales-Cantero, Alejandro; Cuesta-Garcia, Ana Maria; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria 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-Garcia, Ana Maria; Gomez-de-la-Torre, Maria de los Angeles; Diaz, 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 ...