Alessandro Tarantino – författare

The field of experimental unsaturated soil mechanics has grown considerably over the last decade. In the laboratory and in the field, innovative techniques have been introduced into mechanical, hydraulic, and geo-environmental testing. Normally, this information is widely dispersed throughout journals and conference proceedings and it is often difficult to identify suitable equipment and instrumentation for research or professional purposes. In this volume, however, the authors bring together the latest research in laboratory and field testing techniques, and the equipment employed, and examine the current state-of-the-art in a forum devoted solely to experimental unsaturated soil mechanics. The papers published in the proceedings were peer-reviewed by internationally-recognized researchers. The topics tackled by the papers include suction measurement, suction control, mechanical and hydraulic laboratory testing, geo-environmental testing, and field-testing.

This volume contains the Proceedings of the Second International Workshop on Unsaturated Soils, which was held in Anacapri, Italy, from 23 to 25 June 2004. This meeting was organized by the Department of Geotechnical Engineering of the University of Naples Federico II and the Department of Mechanical and Structural Engineering of the University of

This volume contains the Proceedings of the Second International Workshop on Unsaturated Soils, which was held in Anacapri, Italy, from 23 to 25 June 2004. This meeting was organized by the Department of Geotechnical Engineering of the University of Naples Federico II and the Department of Mechanical and Structural Engineering of the University of

technique and its applications are presented. In ad- tion, the limitations of the axis-translation technique ThesuccessfulimplementationofTerzaghi'seffective and the methods that can be used to alleviate some of stress principle for saturated soils in the engineering these limitations are highlighted. Various parameters practice has led many researchers to attempt to extend thatin?uence theaxis-translationtechniquesuchasair a stress stable variable framework to unsaturated diffusion, water volume change, long term testing and soils. For example Bishop (1959) modi?ed Terzaghi evaporation are brie?y described. effective stress equation with the introduction of a soil parameter, v (which is a function of degree of saturation) to interpret the mechanical behaviour of 3 Hanging Water Column unsaturated soils. Several researchers during the last threedecades haveproposedframeworksforinterpret- Buckingham (1907) was one of the pioneering sci- ing the engineering behavior of unsaturated soils in tists who measured the relationship between capillary termsoftwoormoreindependentstressstatevariables potentialandwatercontent(i.e.,SWRC)andexpressed over a large suction range (Fredlund and Morgenstern itasacontinuousfunctionusinghangingwatercolumn 1977; Toll 1990; Wheeler and Sivakumar 1995). (i.e., negative water column) technique. This relation- The research direction in recent years has been ship has been considered as an important milestone towards understanding the comprehensive behaviour in the history of soil physics and the mechanics of of unsaturated soils by extending the critical state soil unsaturated soils (Barbour 1998; Narasimhan 2005).

Preface. Measurement of matric suction using tensiometric and axis translation techniques; F.A.M. Marinho et al. Indirect measurement of suction; R. Bulut, E.C. Leong. Axis translation and negative water column techniques for suction control; S.K. Vanapalli et al. Vapour equilibrium and osmotic technique for suction control; J. Blatz et al. Mechanical testing in unsaturated soils; L.R. Hoyos et al. Laboratory hydraulic testing in unsaturated soils; F. Masrouri et al. Microstructure investigation in unsaturated soils: a review with special attention to contribution of mercury intrusion porosimetry and environmental scanning electron microscopy; E. Romero, P.H. Simms. Geoenvironmental testing; P. Delage, E. Romero. Field measurement of suction, water content, and water permeability; A. Tarantino et al. Water balance and evapotranspiration monitoring in geotechnical and geoenvironmental engineering; Y.J. Cui,J.G. Zornberg. Monitoring the performance of unsaturated soil slopes; C.W.W. Ng et al. Monitoring large scale tests for nuclear waste disposal; E.E. Alonso et al.