Concept

Espace poreux du sol

Publications associées (289)

Fabrication of thermo-responsive nano-valve by grafting-to in melt of poly(N-isopropylacrylamide) onto nanoporous silicon nitride membranes

Philippe Renaud, Alexandre Zenon Ivan Bojko, Raphaël Pugin, Franck Montagne

This article reports the grafting-to in melt of amino and carboxy-terminated poly(N-isopropylacrylamide) (PNIPAM) onto ultrathin nanoporous silicon nitride membranes (NSiNMs) with a mean pore size of 85 +/- 15 nm functionalized respectively with a self-ass ...

Elsevier2014

Expansion mechanisms in calcium aluminate and sulfoaluminate systems with calcium sulfate

Karen Scrivener, Christophe Gosselin, Julien Bizzozero

The long-term expansion of calcium aluminate cement and calcium sulfoaluminate cement in the presence of added gypsum has been studied for samples cured under water. Progressively higher amounts of gypsum were added to the CAC or CSA and it was found that ...

Elsevier2014

Fabrication of a high aspect ratio (HAR) micropillar filter for a magnetic bead-based immunoassay

Martinus Gijs, Christine Ruffert

A microfluidic chip has been realized for investigating immune cell (U937) activation with lipopolysaccharide (LPS) and subsequent pro-inflammatory cytokine (Interleukin-6, IL-6) detection (Ruffert et al. Proc. EMBL Conference Microfluidics 2012a, p 184; P ...

Springer2014

Use of indentation tests to study the influence of confining stress on rock fragmentation by a TBM cutter

Jian Zhao, Lijun Yin, Hongsu Ma

This paper explores the influence of the confining stress on rock fragmentation under the cutter of tunnel boring machine (TBM) by indentation test. Acoustic emission (AE) system was employed for real-time monitoring the rock fragmentation process during t ...

Pergamon-Elsevier Science Ltd2014

Mesoporous TiO2 Beads Offer Improved Mass Transport for Cobalt-Based Redox Couples Leading to High Efficiency Dye-Sensitized Solar Cells

Michael Graetzel, Fabrizio Giordano, Thomas Moehl, Leo-Philipp Heiniger

Overcoming ionic diffusion limitations is essential for the development of high-efficiency dye-sensitized solar cells based on cobalt redox mediators. Here, improved mass transport is reported for photoanodes composed of mesoporous TiO2 beads of varying po ...

Wiley-VCH Verlag Berlin2014

Numerical Simulation of Porosity in Cements

Karen Scrivener, Shashank Bishnoi, Quang Huy Do

The pores in cementitious materials, their sizes and connectivity have an important influence on the durability of concrete. Several microstructural models have been developed to simulate the three-dimensional pore network in cement pastes. In this article ...

Springer Netherlands2013

Mechanisms and critical properties in drying shrinkage of soils: experimental and numerical parametric studies

Lyesse Laloui, Hervé Péron

Mechanisms of free-shrinkage strains of desiccating deformable initially saturated soils are studied. The role of the surface evaporation rate, surface tension and viscosity of pore fluid, and soil compressibility and permeability is investigated in experi ...

National Research Council Canada2013

Multi-Scale Approach to Cracking Criteria for Drying Silty Soils

Lyesse Laloui, Mohammad Monfared

Cracking is a most unwanted development in soil structures undergoing periodic drying. Desiccation cracking arises in the apparent absence of external forces. Hence, either an internal, self equilibrated stress pattern resulting from kinematic incompatibil ...

American Society of Civil Engineers2013

Desiccation shrinkage of non-clayey soils: a numerical study

Lyesse Laloui, Hervé Péron

A meso-scale model based on the evolution of the pore system and idealized as bimodal is numerically examined. A simplified evolution of the model reveals a series of characteristics that qualitatively agree with the observed macroscopic experimental findi ...

Wiley-Blackwell2013

Gas injection tests on a Sand Bentonite Mixture: Investigation on the effects of pore water chemistry

Lyesse Laloui, Alessio Ferrari, Donatella Manca, Mohammad Monfared

In this study a series of swelling and breakthrough tests were performed on a target S/B mixture in proportion 80/20 in dry mass. Tests were carried out on specimen compacted to the same dry density but changing the osmotic suction of the pore water. The t ...

2013

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