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Energy efficiency of fibre reinforced soil formation at small element scale: Laboratory and numerical investigation

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)497-510
Number of pages14
JournalGeotextiles and Geomembranes
Volume46
Issue number4
Early online date25 Apr 2018
DOIs
DateAccepted/In press - 3 Apr 2018
DateE-pub ahead of print - 25 Apr 2018
DatePublished (current) - 1 Aug 2018

Abstract

This paper explores the aspects related to the energy consumption for the compaction of unreinforced and fibre reinforced samples fabricated in the laboratory. It is well known that, for a fixed soil density, the addition of fibres invariably results in an increased resistance to compaction. However, similar peak strength properties of a dense unreinforced sample can be obtained using looser granular soil matrices mixed with small quantities of fibres. Based on both experimental and discrete element modelling (DEM) procedures, this paper demonstrates that less compaction energy is required for building loose fibre reinforced sand samples than for denser unreinforced sand samples while both samples show similar peak strength properties. Beyond corroborating the macro-scale experimental observations, the result of the DEM analyses provides an insight into the local micro-scale mechanisms governing the fibre-grain interaction. These assessments focus on the evolution of the void ratio distribution, re-arrangement of soil particles, mobilisation of stresses in the fibres, and the evolution of the fibre orientation distribution during the stages of compaction.

    Research areas

  • Compaction, Discrete element modelling, Fibre, Geosynthetics, Granular soil, Laboratory, Soil reinforcement

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    Rights statement: This is the final published version of the article (version of record). It first appeared online via ELSEVIER at https://www.sciencedirect.com/science/article/pii/S026611441830030X?via%3Dihub . Please refer to any applicable terms of use of the publisher.

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