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A MULTI-SCALE ANALYSIS OF HEMP-BASED INSULATION MATERIALS



Author(s): Guillaume Delannoy, Sandrine Marceau, Philippe Glé, Etienne Gourlay, Marielle Gueguen-Minerbe, Dinarzed Diafi, Issam Nour, Sofiane Amziane, Fabienne Farcas
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference
on Bio-Based Building Materials
Editor(s): Sofiane AMZIANE, Mohammed SONEBI and Karine CHARLET
ISBN:
e-ISBN: 978-2-35158-192-6
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 485-490
Total Pages: 6
Language : English


Abstract: Biobased materials are increasingly used for building insulation. Hemp concrete (mix of hemp
aggregates and mineral binder) is an efficient thermal insulation material containing renewable
resources. It provides also comfort in habitation thanks to its acoustical and hygrothermal
properties. In this study, two hemp concrete “wall” formulations are manufactured with one type
of hemp shiv and two commercial binders: a rapid setting natural cement and a formulated
binder based on lime. 90 days of curing ensures the hardening of the materials. The influence of
binders on the microstructure and its relation with functional properties is investigated in this
paper. Similar behaviors in thermal conductivity, acoustical performances and hygroscopic
properties are observed for the two binders. No differences are measured through porosity,
which can explain the similar functional properties behaviors as they partly depend on porosity.
Both formulations have low compressive strength compared with hemp concretes in literature.
This could be due to the shiv extractible compounds that impact the hydration of the mineral
binders.


Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00


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