Browsing by Subject "Porosity"

Now showing items 21-40 of 46

    • In vitro degradation of calcium phosphates: Effect of multiscale porosity, textural properties and composition 

      Díez Escudero, Anna; Español Pons, Montserrat; Beats, Sean; Ginebra Molins, Maria Pau (2017-09-15)
      Article
      Open Access
      The capacity of calcium phosphates to be replaced by bone is tightly linked to their resorbability. However, the relative importance of some textural parameters on their degradation behavior is still unclear. The present ...

    • Influence of steam curing on the pore structures and mechanical properties of fly-ash high performance concrete prepared with recycled aggregates 

      Gonzàlez Corominas, Andreu; Etxeberria Larrañaga, Miren; Poon, Chi-Sun (2016-08)
      Article
      Open Access
      In this research work, High Performance Concrete (HPC) was produced employing 30% of fly ash and 70% of Portland cement as binder materials. Three types of coarse recycled concrete aggregates (RCA) sourced from medium to ...

    • La Fábrica del Poblenou 

      Peñín Llobell, Alberto (2020)
      Conference report
      Restricted access - publisher's policy
      The construction of 12 privately promoted dwellings in the Poble Nou district paradoxically becomes an opportunity to recover some aspects of its traditional urban fabric. The scale of the neighbourhood reappears through ...

    • Las fronteras blandas: una aproximación conceptual a la seguridad urbana desde la perspectiva del urbanismo 

      Osorio, Camilo (Departament d’Urbanisme i Ordenació del Territori. Universitat Politècnica de Catalunya, 2017-06)
      Conference report
      Open Access
      El espacio público como el escenario de la acción urbana colectiva, es el principal ámbito donde se pone de manifiesto la seguridad de una ciudad. De ahí que exista una estrecha correlación entre estos dos componentes: ...

    • Left Ventricular Trabeculations Decrease the Wall Shear Stress and Increase the Intra-Ventricular Pressure Drop in CFD Simulations 

      Sacco, Federica; Paun, Bruno; Lehmkuhl Barba, Oriol; Iles, Tinen L.; Iaizzo, Paul A.; Houzeaux, Guillaume; Vázquez, Mariano; Butakoff, Constantine; Aguado-Sierra, Jazmin (Frontiers Media, 2018-04-30)
      Article
      Open Access
      The aim of the present study is to characterize the hemodynamics of left ventricular (LV) geometries to examine the impact of trabeculae and papillary muscles (PMs) on blood flow using high performance computing (HPC). ...

    • Magnesium phosphate cement formulated with low grade magnesium oxide with controlled porosity and low thermal conductivity as a function of admixture 

      Niubó Eslava, Maria; Formosa Mitjans, Joan; Maldonado Alameda, Alex; del Valle Zermeño, Ricardo; Chimenos Ribera, Josep Maria (2016-10)
      Article
      Open Access
      Magnesium phosphate cement (MPC) formulated with low-grade magnesium oxide (LG-MgO) can be better considered as sustainable MPC (sust-MPC). Among other properties, sust-MPC could be used as building material for constructive ...

    • Microstructural evaluation of the water sensitivity of clayey rocks 

      Pineda Jiménez, Jubert Andrés; Romero Morales, Enrique Edgar; Tarragó, Dani; Tauler, Esperança; Alonso Pérez de Agreda, Eduardo (American Society of Civil Engineers (ASCE), 2013)
      Conference report
      Restricted access - publisher's policy
      The paper presents both macroscopic and microstructural evidence of the water sensitivity of a low porosity clayey rock from Northern Spain. Particular emphasis is focused on the effects of water sensitivity at micro level. ...

    • Multi Jet Fusion PA12 manufacturing parameters for watertightness, strength and tolerances 

      Morales Planas, Sergio; Minguella Canela, Joaquim; Llumà Fuentes, Jordi; Travieso Rodriguez, Jose Antonio; García Granada, Andrés-Amador (Multidisciplinary Digital Publishing Institute (MDPI), 2018-08-18)
      Article
      Open Access
      The aim of this paper is to explore the watertightness behaviour for high pressure applications using Multi Jet Fusion technology and polyamide 12 as a material. We report an efficient solution for manufacturing functional ...

    • Multiple characterization study on porosity and pore structure of calcium phosphate cements 

      Pastorino Carraz, David; Canal Barnils, Cristina; Ginebra Molins, Maria Pau (2015)
      Article
      Open Access
      Characterization of the intricate pore structure of calcium phosphate cements is a key step to successfully link the structural properties of these synthetic bone grafts with their most relevant properties, such as in vitro ...

    • On the time decay for the MGT-type porosity problems 

      Baldonedo, Jacobo; Fernández, Jose R.; Quintanilla de Latorre, Ramón (American Institute of Mathematical Sciences, 2022-08)
      Article
      Open Access
      In this work we study three different dissipation mechanisms arising in the so-called Moore-Gibson-Thompson porosity. The three cases correspond to the MGT-porous hyperviscosity (fourth-order term), the MGT-porous viscosity ...

    • Porosity and size gradation of saturated gravel with percolated fines 

      Núñez González, Francisco; Martín Vide, Juan Pedro; Kleinhans Maarten, G. (2016-08)
      Article
      Open Access
      Fine particles may infiltrate through coarse alluvial beds and eventually saturate the subsurface pore space. It is essential to understand the conditions that lead to bed saturation, and to forecast the packing characteristics ...

    • Porosity prediction of calcium phosphate cements based on chemical composition 

      Ohman, Caroline; Unusson, Johanna; Carlsson, Elin; Ginebra Molins, Maria Pau; Persson, Cecilia; Engqvist, Hakan (2015-07-01)
      Article
      Open Access
      Covenantee:   Uppsala universitet
      The porosity of calcium phosphate cements has an impact on several important parameters, such as strength, resorbability and bioactivity. A model to predict the porosity for biomedical cements would hence be a useful tool. ...

    • Properties of bio-based gum Arabic/clay aerogels 

      Wang, Liang; Sánchez Soto, Miguel; Abt, Tobias Martin (2016-11-30)
      Article
      Open Access
      Lightweight bio-based aerogels from sustainable gum Arabic (GA) and sodium montmorillonite (Na+-MMT) clay were prepared by means of a simple freeze-drying process. GA/clay aerogels showed high porosity (87.9%–94.9%) of ...

    • Propuesta de mejora en la conformación de la caja de transmisión 

      Garrido Garcia, Sergio (Universitat Politècnica de Catalunya, 2021-10-29)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   SEAT S.A.
      El present TFE presenta una proposta per a millorar la qualitat interna de la caixa de transmissió de SEAT Componentes aplicant la tecnologia de fabricació additiva. En el desenvolupament del treball es presenten conceptes ...

    • Recent progress on biodegradable tissue engineering scaffolds prepared by thermally-induced phase separation (TIPS) 

      Zeinali, Reza; Valle Mendoza, Luis Javier del; Torras Costa, Juan; Puiggalí Bellalta, Jordi (2021-03-28)
      Article
      Open Access
      Porous biodegradable scaffolds provide a physical substrate for cells allowing them to attach, proliferate and guide the formation of new tissues. A variety of techniques have been developed to fabricate tissue engineering ...

    • Recycled mortars with ceramic aggregates. Pore network transmutation and its relationship with physical and mechanical properties 

      Cabrera Covarrubias, Francisca Guadalupe; Gómez Soberón, José Manuel Vicente; Rosas Casarez,, Carlos Antonio; Almaral Sánchez, Jorge Luis; Bernal Camacho, J.M. (Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-02)
      Article
      Open Access
      The porosity of mortars with recycled ceramic aggregates (10, 20, 30, 50, and 100% as a replacement of natural aggregate) was evaluated and analyzed using three different techniques. The results of gas adsorption (N2), ...

    • Relationship between gas adsorption and the shrinkage and creep of recycled aggregate concrete 

      Gómez Soberón, José Manuel Vicente (2003)
      Article
      Open Access
      In this work, it is described an experimental analysis of specimens of recycled concrete (RC) with replacement of natural aggregate with recycled aggregate originating from concrete (RCA). An experimental analysis to obtain ...

    • Repercussions on concrete permeability due to recycled concrete aggregate 

      Gómez Soberón, José Manuel Vicente; Agulló Fité, Luís; Vázquez Ramonich, Enric (V.M. Malhotra, 2001)
      Conference lecture
      Open Access
      This paper presents an experimental analysis of recycled concrete (RC) in which the natural aggregates are replaced by recycled concrete aggregates (RCA). This experimental program covers the specifications of the aggregates ...

    • Residue strength, water absorption and pore size distributions of recycled aggregate concrete after exposure to elevated temperatures 

      Kou, Shi-Cong; Poon, Chi-Sun; Etxeberria Larrañaga, Miren (2014-10)
      Article
      Restricted access - publisher's policy
      In this paper, the effects of high temperature exposure of recycled aggregate concretes in terms of residual strengths, capillary water absorption capacity and pore size distribution are discussed. Two mineral admixtures, ...

    • SEM image analysis in permeable recycled concretes with silica fume. A quantitative comparison of porosity and the ITZ 

      Chinchillas Chinchillas, Manuel de Jesús; Rosas Casarez,, Carlos Antonio; Arredondo Rea, Susana Paola; Gómez Soberón, José Manuel Vicente; Corral Higuera, Ramón (Multidisciplinary Digital Publishing Institute (MDPI), 2019-07-01)
      Article
      Open Access
      Recycled aggregates (RA) from construction and demolition can be used in permeable concretes (PC), improving the environment. PCs have a significant porous network, their cement paste and the interaction between the paste ...