INFLUENCE OF PARTICLES SHAPE, SIZE AND UNIFORMITY OF SANDS ON THE VOID RATIO RANGE AND CONSEQUENTLY ON THE DYNAMIC PENETRATION TESTS RESULTS

Michael Ghali, Mourad Karray, Mohamed Chekirad, Varvara Roubtsova

In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference

Session: Soil Mechanics III / Mécanique des sols III

ABSTRACT: It has been discussed earlier in the 20th & 21st centuries that the particles shape, size, uniformity, and distribution have great influences on geotechnical properties such as the void ratio range (emax - emin) consequently on the geotechnical tests results. Although this is very well known, a minor progress for studying their effects on the void ratio range has been carried out as a parametric study. this is due to three reasons; first: These parameters are deeply integrated with other parameters such as the relative density. second: There are insufficiency in the most common used techniques to differentiate between these parameters; e.g. in the sieve analysis test, there is failure to differentiate between the real size of particles and the shape effect. Third: The overview has shown that there is no certain quantitative descriptor used in the geotechnical field for the particles shape. This paper presents a literature review on such parameters and initially proposes some solutions for the problem by several techniques such as the Image analysis which seem to be promising tool. correlation between the old and new techniques are also proposed and finally a majority of correlations of (N1)60 with such geotechnical parameters are discussed.

RÉSUMÉ: aux 20e et 21e siècles, l'influence de la forme, la taille, l'uniformité et la distribution des particules sur les propriétés géotechniques telles que l'étendu de vide des vide (emax - emin) et par conséquence sur les résultats des essais géotechniques , a été démontré. bien que, des études paramétriques mineures de leurs effets sur l'étendu de l'indice des vides ont été mené. Cela est dû à trois raisons; premièrement: Ces paramètres sont étroitement liés à d'autres paramètres tels que l'indice de densité relative. Deuxièmement: Il ya une insuffisance dans les techniques les plus utilisées pour différencier ces paramètres; par exemple le tamisage de permet pas de distinguer entre la taille réelle des particules et de l'effet de forme. Troisièmement: l'absence de mesures quantitatives pour approcher les forme de particules le domaine de la géotechnique. Cet article présente une revue de la littérature de ces paramètres et propose plusieurs solutions telles que l'analyse de l'image qui semblent être un outils prometteurs. La corrélation entre les anciennes et les nouvelles techniques sont également proposées ainsi que quelques corrélations entre (N1) 60 et ces paramètres géotechniques ont été discutées.

Access this article:
Canadian Geotechnical Society members can access to this article, along with all other Canadian Geotechnical Conference proceedings, in the Member Area. Conference proceedings are also available in many libraries.

Cite this article:
Michael Ghali; Mourad Karray; Mohamed Chekirad; Varvara Roubtsova (2015) INFLUENCE OF PARTICLES SHAPE, SIZE AND UNIFORMITY OF SANDS ON THE VOID RATIO RANGE AND CONSEQUENTLY ON THE DYNAMIC PENETRATION TESTS RESULTS in GEO2015. Ottawa, Ontario: Canadian Geotechnical Society.

@article{110,author = Michael Ghali; Mourad Karray; Mohamed Chekirad; Varvara Roubtsova,title = INFLUENCE OF PARTICLES SHAPE, SIZE AND UNIFORMITY OF SANDS ON THE VOID RATIO RANGE AND CONSEQUENTLY ON THE DYNAMIC PENETRATION TESTS RESULTS,year = 2015}