Experimental investigation on the effect of the mode of deposition on the pore-access size distribution of sand |
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| Authors: | Noureddine Della Sadok Feia |
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| Institution: | 1. Laboratoire des Sciences des Matériaux et Environnement (LSME), Université Hassiba Benbouali de Chlef, Chlef, Algeria;2. Laboratoire Navier/CERMES, Ecole des Ponts Paris Tech, Marne-la-Vallée, France;3. Laboratoire de Génie Civil (LRGC), Université de Biskra, Biskra, Algeria |
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| Abstract: | It is well known that the specimen preparation method and the resulting sand fabric significantly affect sand behaviour and sand liquefaction resistance. In this study, a simple experimental method namely tensiometric method is presented for evaluation of the effect of the samples reconstituting methods on microstructure and the pore-access size distribution of sands. Specimens were prepared using dry funnel pluviation (DFP) and wet deposition (WD) at two densities Dr = 40% (loose state) and Dr = 80% (dense state). The water-retention curve of a sand specimen is evaluated using a technique similar to the hanging column method by application of a step-by-step variation of suction and measure of the corresponding changes in water content. The pore-access size distribution is then evaluated from the water-retention curve. In this experimental study the effects of the mode of deposition and the uniformity coefficient on the pore-access size distribution are investigated. It was found that the specimen generated by the WD method contained a higher percentage of pore size, contrary to the specimen prepared by the DFP which contained a limited percentage of pore size, causing a great influence on the mechanical behaviour of the specimens. |
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| Keywords: | Sand pore-size distribution water-retention curve porosity mode of deposition |
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