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Abstract

The effect of using different binding agents in combination with hemp shives and fibres in Lime–Hemp Concrete (LHC) building material was examined. LHC is a light composite building material with building lime as binding agents and hemp (Cannabis sativa) as a renewable raw material from agriculture. Contemporary LHC only uses the woody core part of the hemp, the shive. However, using both hemp shives and fibres may improve the mechanical strength, eliminating the need for a fibre separation process. The aim was to elucidate the feasibility of using the entire fragmented hemp stalk in an LHC, and to determine some important material properties such as compressive strength, splitting tensile strength, water sorption and frost resistance. LHC with varying inclusions of the lime-based binders were tested, as were five mixes using the binding agents hydrated lime, hydraulic lime, and cement. Specimens were cured for 12 weeks at room temperature and 40 days in a carbonation room (4.5 vol% CO2), and tested for mechanical properties, water sorption and frost resistance. Using both shives and fibres in LHC may be advantageous for countries such as Sweden where facilities for separating hemp from shives are not commercially available

Keywords

lime-hemp concrete; hemp; binder; carbonation; building material; fibres; shives

Published in

Biosystems Engineering
2009, volume: 103, number: 4, pages: 474-479
Publisher: Elsevier

SLU Authors

  • De Bruijn, Paulien

    • Department of Rural Buildings and Animal Husbandry [LBT], Swedish University of Agricultural Sciences

  • Jeppsson, Knut-Håkan

    • Department of Rural Buildings and Animal Husbandry [LBT], Swedish University of Agricultural Sciences

  • Nilsson, Christer

    • Department of Rural Buildings and Animal Husbandry [LBT], Swedish University of Agricultural Sciences

UKÄ Subject classification

Agricultural Science

Publication identifier

  • DOI: https://doi.org/10.1016/j.biosystemseng.2009.02.005

Permanent link to this page (URI)

https://res.slu.se/id/publ/26297