Now showing items 21-40 of 50

  • Eco-trench: a novel trench solution based on reusing excavated material and a finishing layer of expansive concrete 

    Blanco Álvarez, Ana; Pujadas Álvarez, Pablo; Fernández Rubio, Cristina; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (Instituto Técnico de la Construcción y del Cemento, 2017-10)
    Article
    Open Access
    Installing utility pipelines generates a significant amount of trench arisings, which are usually transported to landfills instead of being reused as backfill material. This practice generates CO2 emissions and wastes raw ...
  • Effects of an internal sulfate attack and an alkali-aggregate reaction in a concrete dam 

    Campos, A.; López Garello, Carlos María; Blanco Álvarez, Ana; Aguado de Cea, Antonio (2018-03)
    Article
    Restricted access - publisher's policy
    The alkali-aggregate reaction and the internal sulfate attack are two chemical reactions that lead to expansions in concrete structures. The former is one of the main causes of expansions in concrete dams and has been ...
  • 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
    Open Access
    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 ...
  • Experiences in Barcelona with the use of fibres in segmental linings 

    Fuente Antequera, Albert de la; Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Aguado de Cea, Antonio (2012-01)
    Article
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    This paper presents the most outstanding experiences regarding the use of fibres as the main reinforcement in precast segmental linings in the metropolitan area of Barcelona. It is known that the addition of structural ...
  • Fibre distribution in macro-plastic fibre reinforced concrete slab-panels 

    Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Fuente Antequera, Albert de la; Aguado de Cea, Antonio (2014-08-14)
    Article
    Restricted access - publisher's policy
    This paper focuses on the study of the influence of flowability and wall-effects of the formwork in the orientation pattern of macro-plastic fibres. In order to identify the preferential orientation of fibres caused by the ...
  • Flat suspended slabs reinforced only with macro-synthetic fibres 

    Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio; Fuente Antequera, Albert de la (2016)
    Conference lecture
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    Despite the remarkable advances in the field of macro-synthetic fibre reinforced concrete, the successful use of plastic macro-fibres as the sole reinforcement in structural elements still requires thorough research. Several ...
  • Flexural post-cracking creep behaviour of macro-synthetic and steel fiber reinforced concrete 

    Pujadas Álvarez, Pau; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Fuente Antequera, Albert de la; Aguado de Cea, Antonio (2016)
    Conference report
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    In this paper the post-cracking creep behaviour of FRC beams under flexural load is evaluated in order to determine whether under certain loading conditions plastic fibres may be safely used in the long-term without ...
  • Inductive method for assessing the amount and orientation of steel fibers in concrete 

    Torrents Dolz, Josep M.; Blanco Álvarez, Ana; Pujadas Álvarez, Pablo; Aguado de Cea, Antonio; Juan Garcia, Pablo; Sánchez-Moragues, Miguel Ángel (2012-04-24)
    Article
    Restricted access - publisher's policy
    Steel fibers are ferromagnetic and they have the property of altering the magnetic field around them. This paper discusses a method and gives a practical example to measure, non-destructively, the amount and orientation ...
  • Influence of the type of fiber on the structural response and design of FRC slabs 

    Blanco Álvarez, Ana; Pujadas Álvarez, Pablo; Fuente Antequera, Albert de la; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (2016-09)
    Article
    Open Access
    Most codes for the design of fiber reinforced concrete (FRC) structures are based on the experience achieved throughout the years with steel fibers. Recent codes include the possibility of applying the same considerations ...
  • Lessons learned about the diagnosis of pathologies in concrete dams: 30 years of research and practice 

    Blanco Álvarez, Ana; Pardo Bosch, Francesc; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (Elsevier, 2019-02)
    Article
    Restricted access - publisher's policy
    Studies on the diagnosis of pathologies of concrete dams are a valuable reference for professionals managing such assets. However, detailed information is rarely reported in the literature. This paper compiles the most ...
  • Luong test for the characterization of the shear post-cracking response of fiber reinforced concrete 

    Blanco Álvarez, Ana; Aire, Carlos; Pujadas Álvarez, Pablo; Pialarissi Cavalaro, Sergio Henrique (2017-09)
    Article
    Open Access
    The behavior of concrete subjected to shear can be significantly improved by the addition of fibers, which may partially or totally substitute the traditional steel stirrups (also known as links). Design recommendations ...
  • Luong test to evaluate residual shear behavior of FRC 

    Aire Untiveros, Carlos Máximo; Blanco Álvarez, Ana; Pujadas Álvarez, Pablo; Pialarissi Cavalaro, Sergio Henrique (2016)
    Conference lecture
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    The behavior of concrete subjected to shear is a complex phenomenon; difficult to be evaluated experimentally. The characterization of the behavior of fiber reinforced concrete (FRC) under shear is even more complex since ...
  • Methodology for the design of controlled low-strength materials: application to the backfill of narrow trenches 

    Blanco Álvarez, Ana; Pujadas Álvarez, Pablo; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (2014-12)
    Article
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    The design of controlled low-strength materials (CLSM) is generally based on experimental approaches without considering an efficient use of the component materials. The present study proposes a general methodology for the ...
  • Metodología para el diseño óptimo de dovelas de hormigón reforzado con fibras 

    Fuente Antequera, Albert de la; Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Aguado de Cea, Antonio (2012)
    Conference report
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    En este trabajo se presentan una de las experiencias más relevantes relativas al uso de fibras estructurales como refuerzo del hormigón substitución prácticamente toda la armadura pasiva tradicional en dovelas para anillos ...
  • Multidirectional double punch test to assess the post-cracking behaviour and fibre orientation of FRC 

    Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Fuente Antequera, Albert de la; Aguado de Cea, Antonio (2014-05-15)
    Article
    Restricted access - publisher's policy
    The wide variety of tests currently used for the characterization of fibre reinforced concrete (FRC) only allow a unidirectional characterization (without considering the orientation of the fibres in the matrix). However, ...
  • Multidirectional double punch test to assess the post-cracking behaviour of FRC 

    Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Fuente Antequera, Albert de la; Aguado de Cea, Antonio (2016)
    Conference report
    Restricted access - publisher's policy
    Several authors have shown the direct influence of the orientation of the fibres on the residual strength of the material. From a design-oriented perspective, the anisotropy due to the dispersion and orientation of fibres ...
  • New analytical model to generalize the Barcelona Test using axial displacement 

    Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Fuente Antequera, Albert de la; Aguado de Cea, Antonio (2013)
    Article
    Restricted access - publisher's policy
    The Barcelona Test has proved to be very suitable for the systematic control of the tensile properties of Fibre Reinforced Concrete (FRC). Nevertheless, the need to measure the total circumferential opening displacement ...
  • 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
    Open Access
    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 ...
  • Plastic fibres as the only reinforcement for flat suspended slabs: Experimental investigation and numerical simulation 

    Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (2014-01-27)
    Article
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    This paper focuses on the study of the structural response of hyperstatic concrete flat suspended slabs reinforced only with structural plastic macro-fibres. First, the experimental program is described and then the results ...
  • Plastic fibres as the only reinforcement for flat suspended slabs: Parametric study and design considerations 

    Pujadas Álvarez, Pablo; Blanco Álvarez, Ana; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio; Grünewald, Steffen; Blom, CBM; Walraven, Joost C (2014-11-15)
    Article
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    The use of constitutive equations from the standards to model flat suspended slabs reinforced only with plastic fibres leads to an overestimation of the experimental response of these elements. To address such problem, a ...