Now showing items 1-20 of 26

  • 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
    Open Access
    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
    Restricted access - publisher's policy
    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
    Open Access
    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 ...
  • 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
    Open Access
    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
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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 ...
  • 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 ...
  • Effects of biaxial confinement in mortars exposed to external sulfate attack 

    Ikumi Montserrat, Tai; Segura Pérez, Ignacio; Pialarissi Cavalaro, Sergio Henrique (2019-01)
    Article
    Restricted access - publisher's policy
    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 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
    Open Access
    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)
    Part of book or chapter of book
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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 ...
  • Inlfuence [sic] of early sulfate exposure on the pore network development of mortars 

    Ikumi Montserrat, Tai; Segura Pérez, Ignacio; Pialarissi Cavalaro, Sergio Henrique (Elsevier, 2017-07)
    Article
    Open Access
    The objective of this paper is to evaluate the influence of sulfate exposure on the pore network development of several Portland cement matrices. MIP, XRD and SEM analysis were performed at different ages in samples exposed ...
  • Numerical assessment of external sulfate attack in concrete structures: a review 

    Ikumi Montserrat, Tai; Segura Pérez, Ignacio (2019-07)
    Article
    Restricted access - publisher's policy
    The slow progress of the external sulfate attack and the large size and criticality of typical structures affected by this phenomenon establish numerical modeling as a key tool to assess the future evolution of concrete ...
  • Precast landscape furniture 

    Mena Sebastià, Francisco; Fuente Antequera, Albert de la; Segura Pérez, Ignacio; Aguado de Cea, Antonio (2017-04)
    Article
    Restricted access - publisher's policy
    The use of recycled aggregates (RA) in structural concrete has been mainly limited to applications with low both mechanical and aesthetic requirements. Likewise, the maximum amount of RA that can be used in the concrete ...
  • Radiological protection and mechanical properties of concretes with EAF steel slags 

    González-Ortega, Martha Alejandra; Segura Pérez, Ignacio; Pialarissi Cavalaro, Sergio Henrique; Toralles-Carnonari, Berenice; Aguado de Cea, Antonio; Andrello, A. C. (2014-01-31)
    Article
    Restricted access - publisher's policy
    The main objective of this paper is to evaluate the behavior of concretes with EAF slags with structural responsibility exposed to gamma radiation. Six mixes were designed: four concretes made with EAF slags, one conventional ...
  • 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 ...
  • Sand-cement concrete in the century-old Camarasa dam 

    Blanco Álvarez, Ana; Segura Pérez, Ignacio; Pialarissi Cavalaro, Sergio Henrique; Chinchón Payá, Servando; Aguado de Cea, Antonio (2016-08)
    Article
    Open Access
    Sand-cement emerged in the early twentieth century as an alternative binder in infrastructures that required a significant amount of concrete volume in order to reduce the costs associated with portland cement. This binder ...
  • Service-life assessment of existing precast concrete structure exposed to severe marine conditions 

    Segura Pérez, Ignacio; Pialarissi Cavalaro, Sergio Henrique; Fuente Antequera, Albert de la; Aguado de Cea, Antonio; Alegre Heitzmann, Vicente (2016-06)
    Article
    Open Access
    The overall performance of a concrete structure is considered to be a key issue when determining its service life. The widespread use of precast concrete and consideration of durability as a design parameter in most of the ...
  • Simplified analytical assessment of damage induced by the external sulphate attack in concrete piles 

    Ikumi Montserrat, Tai; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio; Goodier, Chris; Austin, Simon (Springer, 2017)
    Conference lecture
    Restricted access - publisher's policy
    Underground structures and foundations, including piles, constructed with reinforced concrete may be in contact with sulphate-rich soils and water. Structural elements exposed to these conditions may be affected by an ...