Exploració per tema "Ciment -- Additius"

Ara es mostren els items 1-12 de 12

    • A nanoscale study of dissolution and growth processes in cement hydrates 

      Rheinheimer, Vanessa (Universitat Politècnica de Catalunya, 2012-11-30)
      Tesi
      Accés obert
      This thesis aims at providing new knowledge on the, otherwise poorly known, molecular-scale mechanisms that operate during hydration of cement phases and dissolution of their hydrates. In order to pursue this objective, a ...

    • Caracteristicas reologicas de pastas de cal. 

      Rosell Amigó, Juan Ramón; Chinchón, S.; Haurie Ibarra, Laia; Navarro Ezquerra, Antonia; Rodríguez Cantalapiedra, Inma (Instituto de Ciencias de la Construcción Eduardo Torroja (ICCET), 2008)
      Text en actes de congrés
      Accés obert
      Este trabajo presenta las características reológicas de pastas de cal, especificando la influencia de su origen en la obtención de valores de trabajabilidad. El estudio se realiza sobre pastas de cal hidratada, de ...

    • Cements based on kaolinite waste 

      García Giménez, Rosario; Vigil de la Villa, Raquel; Frias Rojas, Moisés; Martínez Ramírez, Sagrario; Vegas, Iñigo; Fernández Carrasco, Lucía (European Geosciences Union (EGU), 2018-08)
      Article
      Accés obert
      The cement industry involves high-energy consumption that generates high CO2 emissions into the atmosphere. Environmental concerns can be addressed by replacing parts of Portland cement clinkers with pozzolanic materials ...

    • Coal mining waste: an alternative for the design of metakaolinite-based eco-efficient cements 

      Frias Rojas, Moisés; Caneda Martínez, Laura; García Giménez, Rosario; Fernández Carrasco, Lucía (Instituto de Ciencias de la Construcción Eduardo Torroja. Consejo Superior de Investigaciones Científicas (IETcc-CSIC), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Los materiales arcillosos de naturaleza caolinítica han despertado un gran interés en los últimos tiempos como materia prima para la producción de metacaolinita y su posterior uso como adición puzolánica al cemento. No ...

    • Comportamiento hidromecánico de agregados cementados artificialmente 

      Polanco Candelario, Marcos José (Universitat Politècnica de Catalunya, 2016-09-23)
      Projecte Final de Màster Oficial
      Accés obert
      La investigación llevada a cabo parte de la continuación de la línea de investigación de la creación de clastos en el laboratorio con mezclas de cemento, con el suelo que se obtiene in situ en el Campus Nord, UPC. La ...

    • Effect of partial substitution of highly reactive mineral additions by nanosilica in cement pastes 

      da Silva Rego, Joao Henrique; Frias Rojas, Moises; Moragues Terrades, Amparo; Fernández Carrasco, Lucía; Romero Morales, Enrique Edgar; Sanchez de Rojas, Maria Isabel (2019-01)
      Article
      Accés obert
      The phenomena involved in portland cement hydration and interactions with nanosilica are very complex and not yet fully understood. In addition, few papers have currently proposed to investigate the microstructure and ...

    • Indentation and sliding contact testing of three laser-textured and PVD-coated cemented carbide tools 

      Fang, Shiqi; Colominas Guardia, Carles; Pauly, Christoph; Salán Ballesteros, Maria Núria; Llanes Pitarch, Luis Miguel (Elsevier, 2023-11)
      Article
      Accés restringit per política de l'editorial
      A new concept for cemented carbide tools was presented with laser-generated abrasive-like protrusions on their machining surfaces that mimic the surface features of diamond or cubic boron nitride abrasives commonly used ...

    • Influence of spraying on the early hydration of accelerated cement pastes 

      Salvador, Renan; Pialarissi Cavalaro, Sergio Henrique; Cano, Miguel; Domingues de Figueiredo, Antonio (2016-10)
      Article
      Accés obert
      In practice, most of the studies about the interaction between cement and accelerators is performed with hand-mixed pastes. However, in many applications mixing occurs through spraying, which may affect accelerators ...

    • Influence of ZnO on the activation of kaolinite-based coal waste: pozzolanic activity and mineralogy in the pozzolan/lime system 

      García Giménez, Rosario; Vigil de la Villa, Raquel; Martínez Ramírez, Sagrario; Fernández Carrasco, Lucía; Frias Rojas, Moisés (2018-05)
      Article
      Accés obert
      One inconvenience presented by the thermal activation of kaolinite-based wastes is their low content of metakaolinite, a highly pozzolanic product listed in current standards for the manufacture of commercial cements. The ...

    • New developments in low clinker cement paste mineralogy 

      Frias Rojas, Moisés; Vigil de la Villa, Raquel; Garcia, Rosario; Martínez Ramírez, Sagrario; Fernández Carrasco, Lucía (2018-12)
      Article
      Accés obert
      The use of industrial waste as a cement addition often changes the composition and development of the hydrated phases and with them matrix performance and durability, in particular at later ages. The effect of the presence ...

    • Performance-based procedure for the definition of controlled low-strength mixtures 

      Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (2015-11)
      Article
      Accés obert
      Controlled low-strength material (CLSM) is a self-consolidating cementitious material used as backfill in narrow trenches. The high content of aggregates and water in CLSM leads to a special behavior that is closer to soil ...

    • The wetting water in cement-based materials: modeling and experimental validation 

      Klein, Nayara Soares; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio; Segura Pérez, Ignacio; Toralles Carbonari, Berenice Martins (2016-09)
      Article
      Accés restringit per política de l'editorial
      The physical role of water in cement-based materials is observed through the wetting of the grains, the need to fill the voids between particles and to separate these particles from one another, providing fluidity. The ...