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Ara es mostren els items 1-20 de 45

    • A system designed to monitor in-situ the curing process of sprayed concrete 

      Aparicio Secanellas, Sofía; González Hernández, Margarita; Segura Pérez, Ignacio; Morata Royes, Miquel; Anaya, José Javier (Elsevier, 2019-11)
      Article
      Accés obert
      In this paper a system is presented to monitor in-situ the curing process of sprayed concrete. This system consists of an instrumented trough based on wireless sensor networks for monitoring temperature/relative humidity ...

    • Absorption conformations in the intercalation process of polycarboxylate ether based superplasticizers into montmorillonite clay 

      Borralleras, Pere; Segura Pérez, Ignacio; Garcia Aranda, Miguel Angel; Aguado de Cea, Antonio (Elsevier, 2020-03)
      Article
      Accés obert
      The intercalation of polycarboxylate based superplasticizers (PCE) into montmorillonite clay (MNT) is arranged preferably by two types of absorption conformations: one-to-one conformation and bridging conformation. A third ...

    • Alternative methodology to consider damage and expansions in external sulfate attack modeling 

      Ikumi Montserrat, Tai; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio; Aguado de Cea, Antonio (2014-09-01)
      Article
      Accés obert
      A diffusion–reaction numerical model is proposed to simulate the response of concrete exposed to external sulfate attack. Diffusion properties are modified based on the strain reached and the ratio of porosity filled by ...

    • Bioreceptivity evaluation of cementitious materials designed to stimulate biological growth 

      Manso Blanco, Sandra; De Muynck, Willem; Segura Pérez, Ignacio; Aguado de Cea, Antonio; Steppe, Kathy; Boon, Nico; de Belie, Nele (2014-02-09)
      Article
      Accés restringit per política de l'editorial
      Ordinary Portland cement (OPC), the most used binder in construction, presents some disadvantages in terms of pollution (CO2 emissions) and visual impact. For this reason, green roofs and façades have gain considerable ...

    • Characterization of a fibre-reinforced self-compacting concrete with 100% of mixed recycled aggregates 

      Ortiz Lozano, José Ángel; Fuente Antequera, Albert de la; Segura Pérez, Ignacio; Aguado de Cea, Antonio; Parapinski Dos Santos, Ana Carolina; Pacheco Martínez, Jesús; Soto Martínez, Juan J. (WIT Press, 2017-11)
      Article
      Accés obert
      A new cement-based material is presented in this research contribution. The material consists in a fibre-reinforced self-compacting concrete with 100% of mixed recycled aggregate. Six different mixes were produced in two ...

    • Conductive concrete made from recycled carbon fibres for self-heating and de-icing applications in urban furniture 

      Faneca Llesera, Gerard; Ikumi Montserrat, Tai; Torrents Dolz, Josep M.; Aguado de Cea, Antonio; Segura Pérez, Ignacio (Instituto Técnico de la Construcción y del Cemento, 2020-09)
      Article
      Accés obert
      This paper presents a broad experimental study performed at laboratory and industrial facilities to develop conductive concrete for self-heating and de-icing applications in urban furniture. Self-heating capacity is achieved ...

    • Continuous monitoring of early-age properties of sprayed mortars by in situ ultrasound measurements 

      Pellegrino, Francesco; Salvador, Renan Pícolo; Aparicio, Sofía; González Hernández, Margarita; Anaya Velayos, José Javier; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio (Elsevier, 2021-07)
      Article
      Accés obert
      The development of early age properties of sprayed concrete is a key factor that governs its mix design and safe application. The conventional methods to evaluate the evolution of mechanical strength in sprayed concrete ...

    • Desarrollo de dovelas de hormigones reforzados con fibras no metálicas de alta durabilidad y sostenibilidad 

      Cruz Romero, Janill Marie de la; Navarro, Paz; Sánchez, María; Martín, Elena; Segura Pérez, Ignacio; Fuente Antequera, Albert de la (2022)
      Text en actes de congrés
      Accés obert
      Esta investigación se ha orientado a los aspectos mecánicos y de durabilidad de hormigones reforzados con fibras no metálicas para dovelas de túneles. Se han abordado los requerimientos de resistencias residuales a ...

    • Development and experimental validation of an overlay mortar with biocide activity 

      Vaquero Martinez, José María; Cugat Martí, Víctor; Segura Pérez, Ignacio; Calvo Torras, Mari Angels; Aguado de Cea, Antonio (2016-11)
      Article
      Accés obert
      Biodeterioration of concrete by microorganism colonisation may be a problem in several structures, especially in irrigation and hydroelectric canals. The main problem in such structures is the proliferation of algae and ...

    • Development of a low pH cementitious material to enlarge bioreceptivity 

      Manso Blanco, Sandra; Mestres Beà, Gemma; Ginebra Molins, Maria Pau; de Belie, Nele; Segura Pérez, Ignacio; Aguado de Cea, Antonio (2014-03-15)
      Article
      Accés restringit per política de l'editorial
      This paper presents a laboratory investigation into the development of a low-pH cementitious material in order to enlarge bioreceptivity. Two different options were tested; reduction of Ordinary Portland Cement (OPC) pH ...

    • Development of conductive cementitious materials using recycled carbon fibres 

      Faneca Llesera, Gerard; Segura Pérez, Ignacio; Torrents Dolz, Josep M.; Aguado de Cea, Antonio (2018-09)
      Article
      Accés obert
      Conductive cementitious materials have gained immense attention in recent years owing to the possibility of achieving multifunctional materials. The usual approach has been to incorporate carbonaceous nanomaterials and/or ...

    • Dovelas innovadoras de alta durabilidad reforzadas sólo con fibras no metálicas 

      Navarro, Paz; Sánchez, María; Martín, Elena; Segura Pérez, Ignacio; Cruz Romero, Janill Marie de la; Fuente Antequera, Albert de la (2019-09)
      Article
      Accés obert
      Los anillos de dovelas prefabricadas de HRF son un revestimiento habitual en túneles excavados con tuneladora. DRAGADOS-gGRAVITY Engineering-UPC han querido ir un paso más allá estudiando el comportamiento de dovelas ...

    • Early age hydration of cement pastes with alkaline and alkali-free accelerators for sprayed concrete 

      Pícolo Salvador, Renan; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio; Domingues de Figueiredo, Antonio; Pérez, Jorge (2016-05)
      Article
      Accés obert
      The objective of this study is to evaluate the early age hydration mechanisms of accelerated CEM I pastes. Liquid phase analysis, conductimetry, isothermal calorimetry, in situ XRD and SEM were performed on cement pastes ...

    • Effects of biaxial confinement in mortars exposed to external sulfate attack 

      Ikumi Montserrat, Tai; Segura Pérez, Ignacio; Pialarissi Cavalaro, Sergio Henrique (2019-01)
      Article
      Accés obert
      Research on external sulfate attack (ESA) is usually performed on small scale specimens under free expanding conditions. However, most field structures cannot expand freely due to confinement induced by the ground or other ...

    • Evaluation of conductive concrete made with steel slag aggregates 

      Santillán Alarcón, Ninel Estefanía; Speranza, Santiago; Torrents Dolz, Josep M.; Segura Pérez, Ignacio (2022-12)
      Article
      Accés obert
      The incorporation of black steel slag (waste from steel production) in concrete responds to a greater awareness of sustainability. In addition, it is capable of increasing electrical conductivity. The objective of this ...

    • Evaluation of natural colonisation of cementitious materials: Effect of bioreceptivity and environmental conditions 

      Manso Blanco, Sandra; Calvo-Torrás, María Angeles; De Belie, Nele; Segura Pérez, Ignacio; Aguado de Cea, Antonio (2015-04-15)
      Article
      Accés obert
      Incorporation of living organisms, such as photosynthetic organisms, on the structure envelope has become a priority in the area of architecture and construction due to aesthetical, economic and ecological advantages. ...

    • Evaluation of the antimicrobial efficacy of industrial substrata 

      Calvo, María de los Ángeles; Vaquero, José María; Girmé, Gisela; Arosemena, Esteban Leonardo; Manso Blanco, Sandra; Segura Pérez, Ignacio; Aguado de Cea, Antonio (2014-09)
      Capítol de llibre
      Accés restringit per política de l'editorial
      In this chapter we provide different methodologies to assess the antimicrobial activity of various substrates for industrial application. The capacity of microorganisms to colonize or remain viable on a variety of media: ...

    • Expansions with different origins in a concrete dam with bridge over spillway 

      Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio; Segura Castillo, Luis; Aguado de Cea, Antonio (Elsevier, 2018-02)
      Article
      Accés obert
      Concrete dams with expansions from different origins are rare and scarcely documented in the literature, therefore their study gains special interest. This study presents the case of a 62-year-old concrete dam with signs ...

    • Influence of experimental procedure on d-spacing measurement by XRD of montmorillonite clay pastes containing PCE-based superplasticizer 

      Borralleras, Pere; Segura Pérez, Ignacio; Garcia Aranda, Miguel Angel; Aguado de Cea, Antonio (2019-02)
      Article
      Accés obert
      This study investigates the influence of the experimental procedure on determining the d-space enlargement of montmorillonite clay (MNT) produced by the absorption of polycarboxylate (PCE) based superplasticizers. d-Spacing ...

    • Influence of the polymer structure of polycarboxylate-based superplasticizers on the intercalation behaviour in montmorillonite clays 

      Borralleras, Pere; Segura Pérez, Ignacio; Garcia Aranda, Miguel Angel; Aguado de Cea, Antonio (Elsevier, 2019-09)
      Article
      Accés obert
      The influence of polymeric structure of polycarboxylate-ether (PCE) based superplasticizers on the intercalation behavior in sodium montmorillonite clay (Na-MNT) is investigated by performing in-situ X-ray diffraction ...