EFFECT OF LINSEED OIL AND METAKAOLIN ON THE MECHANICAL, THERMAL AND TRANSPORT PROPERTIES OF HEMP-LIME CONCRETE

Author(s): J. Sheridan, M. Sonebi, S. Taylor, S. Amziane
Paper category: Proceedings
Book title: ICBBM 2017 Proceedings of the 2nd International Conference on Bio-Based Building Materials
Editor(s): Sofiane AMZIANE and Mohammed SONEBI
e-ISBN: 978-2-35158-192-6
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 125-133
Total Pages: 9
Language : English

Abstract: With the increasing concern given to pollution and climate change bio-based building materials have been pushed to the forefront of research in an effort to reduce the large carbon footprint of the construction industry in order to meet emission targets One of these materials is hemp concrete which is a bio-composite made up of the non-fibrous part of hemp called shiv, water and a lime binder. This study investigated two different binders; hydrated lime as a control and a composite binder containing 80% hydrated lime and 20% metakaolin. The effect of metakaolin is investigated on the mechanical, thermal and transport properties. The pre-treatment of the aggregate with linseed oil is also studied. It was found that the addition of metakaolin increased the compressive strength of the hydrated lime samples. It was also observed that for both binder types the addition of metakaolin into the binder increased the capillarity water absorption of the samples. The addition of metakaolin reduced the thermal conductivity of hydrated lime samples when the test was done in the direction perpendicular to the fibre orientation. Finally, the pretreatment of the aggregate with linseed oil increased the compressive strength and modulus of elasticity of the samples and greatly reduced the material’s capillarity absorption. Linseed oil pretreatment also lead to an increase in thermal conductivity of the samples

Online publication : 2017
Publication type : full_text
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