Abstract
A double porosity structure is recognized in compacted expanded perlite, a granular material made from crushed perlite rock subjected to heating treatment. Due to its generation process, each grain has a micro-scale porosity network and a series of closed pores (isolated holes), while particle size distribution is highly uniform. An experimental investigation combining water retention tests and mercury intrusion porosimetry is presented. The results allowed for a detailed description of the double porosity system and retention properties and may represent a basis for a future contribution on hydraulic and mechanical aspects of the behaviour of double porosity materials.
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Caruso, M., Sterpi, D. (2012). Water Retention Properties and Microstructure of Compacted Expanded Perlite. In: Mancuso, C., Jommi, C., D’Onza, F. (eds) Unsaturated Soils: Research and Applications. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31116-1_26
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DOI: https://doi.org/10.1007/978-3-642-31116-1_26
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