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

Erdin Ibraim*, Jean-Francois Camenen, Andrea Diambra, Karolis Lairelis, Laura Visockaite, Nilo Consoli

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

11 Citations (Scopus)
352 Downloads (Pure)


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.

Original languageEnglish
Pages (from-to)497-510
Number of pages14
JournalGeotextiles and Geomembranes
Issue number4
Early online date25 Apr 2018
Publication statusPublished - 1 Aug 2018


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


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