Now showing items 1-19 of 19

    • 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
      Restricted access - publisher's policy
      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 ...
    • Application of BCN test for controlling fiber reinforced shotcrete in tunnelling works in Chile 

      Carmona Malatesta, Sergio; Molins i Borrell, Climent (Institute of Physics (IOP), 2017)
      Conference report
      Open Access
      In many tunnelling projects currently under construction in Chile, the quality of fiber reinforced shotcretes (FRS) is controlled by means of its energy absorption capacity determined by testing squared panel following the ...
    • Compressive strength estimation of sprayed concrete at early ages 

      Galobardes Reyes, Isaac; Domingues de Figueiredo, Antonio; Pialarissi Cavalaro, Sergio Henrique; García Vicente, Tomàs; Rueda, Angel; Pérez, Jorge (2013)
      Conference report
      Restricted access - publisher's policy
      The sprayed concrete complies a construction technique that combines the placement and the compacting of concrete in only one process. This sort of concrete, which is widely used in underground constructions, requires a ...
    • Determinación de la absorción de energía del hormigón reforzado con fibras mediante el ensayo de panel EFNARC y el ensayo Barcelona 

      Carmona Malatesta, Sergio; Molins i Borrell, Climent (Universitat Politècnica de València, 2018)
      Conference report
      Open Access
      Durante los últimos años, en muchos proyectos que se ejecutan en Chile, para el control de calidad de los hormigones proyectados reforzados con fibras usados para el sostenimiento de túneles se utiliza la capacidad de ...
    • 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
      Open Access
      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 ...
    • Effect of cement composition on the reactivity of alkali-free accelerating admixtures for shotcrete 

      Salvador, Renan; Pialarissi Cavalaro, Sergio Henrique; Rueda Alba, Angel Julian; Domingues de Figueiredo, Antonio (2014)
      Conference report
      Restricted access - publisher's policy
      The evolution of mechanical strength in cement matrices is strongly dependent on cement properties and on the admixtures used. Limestone additions and accelerators, used in shotcrete, alter the hydration mechanisms of the ...
    • Effect of gypsum content in sprayed cementitious matrices: early age hydration and mechanical properties 

      Herrera Messen, Carlos; Salvador, Renan Pícolo; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (2019-01)
      Article
      Restricted access - publisher's policy
      Sprayed materials must present short setting times and a fast early strength development for safety and productivity reasons. In order to improve these characteristics, the construction industry has focused on the development ...
    • Estudi relatiu a l'efecte de la incorporació de fibres sintètiques polimèriques d'alt mòdul elàstic en el formigó projectat per via humida 

      Canals i Llopart, Guillem (Universitat Politècnica de Catalunya, 2002-09)
      Minor thesis
      Open Access
      El formigó és el material més extensament utilitzat en l’àmbit de la construcció gràcies a les seves excel·lents propietats que el converteixen en el material econòmicament i funcional més viable. Amb l’objectiu d’ampliar ...
    • Estudio relativo al control de ejecución del hormigón proyectado. Aplicación en el soterramiento del FGC en Pallejà 

      Romero Oliver, Teódulo (Universitat Politècnica de Catalunya, 2008-05)
      Minor thesis
      Open Access
      La presente tesina estudia el control de ejecución del hormigón proyectado. En ella, se realiza un trabajo bibliográfico del control de materiales, procedimentos de dosificación, fabricación y puesta en obra, así como ...
    • Fibre distribution and tensile response anisotropy in sprayed fibre reinforced concrete 

      Segura Castillo, Luis; Pialarissi Cavalaro, Sergio Henrique; Goodier, Chris; Aguado de Cea, Antonio; Austin, Simon (2018-02)
      Article
      Open Access
      Sprayed steel fibre reinforced concrete (SSFRC) is a material that tends to present anisotropy, due to the action of the spraying process inducing preferential fibre orientation. Despite numerous applications worldwide ...
    • Hormigón proyectado: análisis de la evolución de la vía seca a la vía húmeda 

      Marín Lozano, Alberto (Universitat Politècnica de Catalunya, 2003-04)
      Minor thesis
      Open Access
      En el contexto del proceso constructivo de obras de hormigón, la proyección del material sobre una superficie a alta velocidad constituye una técnica de puesta en obra interesante desde el punto de vista productivo ya que ...
    • Maturity method to predict the evolution of the properties of sprayed concrete 

      Galobardes Reyes, Isaac; Pialarissi Cavalaro, Sergio Henrique; Goodier, Chris; Austin, Simon; Rueda Alba, Angel Julian (2015-03)
      Article
      Open Access
      The maturity method provides a simple approach for assessing the strength evolution of concrete. Although it is already used in the precast industry, no reported applications with sprayed concrete may be found in the ...
    • Modelling of fiber-reinforced concrete and application case 

      Puig Damians, Ivan; Olivella Pastallé, Sebastià; Cots Corominas, Carles (International Centre for Numerical Methods in Engineering (CIMNE), 2019)
      Conference report
      Open Access
      This report summarizes the first results of 2D and 3D finite element method numerical modelling analysis of fiber-reinforced concrete behaviour and a tunnel case study application. A porosity strength-dependant material ...
    • Parameters controlling early age hydration of cement pastes containing accelerators for sprayed concrete 

      Salvador, Renan; Pialarissi Cavalaro, Sergio Henrique; Cincotto, Maria Alba; Domingues de Figueiredo, Antonio (2016-11)
      Article
      Open Access
      The objective of this work is to parametrize the early age hydration behavior of accelerated cement pastes based on the chemical properties of cement and accelerators. Eight cements, three alkali-free and one alkaline ...
    • Relation between ultrasound measurements and phase evolution in accelerated cementitious matrices 

      Pícolo Salvador, Renan; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio; Hernández, Margarita G.; Ranz, Javier; Figueiredo, Antonio (2017-01)
      Article
      Open Access
      This paper focuses on the characterization of setting and hardening of accelerated cementitious matrices by ultrasound propagation velocity, correlating these processes with chemical parameters and the phase evolution ...
    • Shear behaviour of sprayed concrete 

      García Vicente, Tomàs; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique (2016-10)
      Article
      Open Access
      Shear in sprayed concrete (SC) may govern the design criteria in certain applications subjected to seismic loads or in bolted areas. However, it has been scarcely studied given the complexity of reproducing the production ...
    • Use of Barcelona test for controlling fiber reinforced shotcrete in tunnelling 

      Carmona Malatesta, Sergio Alejandro; Molins i Borrell, Climent (2016)
      Conference report
      Restricted access - publisher's policy
      During last years, many tunnelling projects which are carried out in Chile use the EFNARC panel test for the quality control of sprayed concrete. However, this test needs large and heavy specimens, which are filled when ...
    • Use of BCN test for controlling tension capacity of fiber reinforced shotcrete in mining works 

      Carmona Malatesta, Sergio; Molins i Borrell, Climent (Elsevier, 2019-02)
      Article
      Restricted access - publisher's policy
      Fiber reinforced shotcrete (FRS) is widely used for tunnel construction. However, the systematic control of FRS properties is hampered by the complexities of the experimental procedures used. The experiments are normally ...
    • Verificación de la isotropía del hormigón proyectado por vía húmeda 

      Agulló Fité, Luís; García Vicente, Tomàs; Aguado de Cea, Antonio; Yubero Cambra, Eduardo (2009)
      Article
      Open Access
      Dadas las diferencias entre el hormigón de partida y el colocado, la evaluación de las propiedades de un hormigón proyectado, por vía húmeda o seca, se realiza mediante la extracción de testigos, evaluándose las propiedades ...