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Concept

Lyophilisation

Publications associées (27)

Pore structure evolution of compacted granular bentonite during wetting and drying cycles

Lyesse Laloui, Alessio Ferrari, Ali Seiphoori

Deep geological repositories are considered as suitable solutions for the disposal of high level nuclear wastes. In several repository concepts (e.g. in Spain and Switzerland), bentonites are selected as the main component of the engineered barrier to be p ...

2014

Desiccation shrinkage of non-clayey soils: multi-physics mechanisms and a microstructural model

Lyesse Laloui, Hervé Péron

Analysis of macroscopic desiccation shrinkage experiments indicates that most, but not all of the shrinkage during drying occurs while soil is still saturated. Shrinkage practically ceases and air starts to penetrate the soil, when the water content is sti ...

Wiley-Blackwell2013

The influence of sodium and potassium hydroxide on volume changes in cementitious materials

Karen Scrivener, Aditya Kumar

This research investigates the influence of alkali hydroxides on unrestrained volume changes. A detailed multi-method approach is used to characterize the progress of cement hydration, autogenous and drying volume changes (i.e., shrinkage), autogenous RH d ...

Pergamon-Elsevier Science Ltd2012

Benchmark of experimental techniques for measuring and controlling suction

Lyesse Laloui, Hervé Péron

The paper presents a benchmarking study carried out within the ‘Mechanics of Unsaturated Soils for Engineering’ (MUSE) network aimed at comparing different techniques for measurement and control of suction. Techniques tested by the eight ‘Mechanics of Unsa ...

2011

Drying shrinkage and cracking initiation in clays: Main modeling concepts and application to the ventilation of a tunnel

Lyesse Laloui, Hervé Péron, John Eichenberger

Damage induced by desiccation in clays (i.e. drying shrinkage and cracking) is an issue to be investigated in geo-environmental engineering, especially when the clay is used as a confining barrier for industrial and nuclear waste storage. Dramatic increase ...

Taylor & Francis Group2010

Mechanisms of degradation of concrete by external sulfate ions under laboratory and field conditions

The durability of concrete is a major challenge for the construction, which devotes one third to one half of its annual investment to building maintenance. The lack of field data regarding concrete durability, especially in the case of exposure to sulfate ...

EPFL2010

Direct Alkynylation of Indole and Pyrrole Heterocycles

Jérôme Waser, Jonathan Brand

Easy does it: The unique properties of benziodoxolone alkynyl periodinane 1 and gold catalysts have allowed the development of a high yielding, operationally simple (room temperature, no dry solvents or inert conditions, commercially available catalyst) re ...

Wiley-VCH Verlag GmbH2009