Characterization and comparison of hygric properties of rape straw concrete and hemp concrete

•New bio-based material called “straw lime concrete” (SLC).•Experimental protocol validation (hemp lime concrete (HLC); the reference material).•Moisture properties characterization.•The both materials (SLC and HLC) exhibit an “excellent” moisture buffer capacity. The use of plant particles as aggre...

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Bibliographic Details
Published in:Construction & building materials 2016-01, Vol.102, p.679-687
Main Authors: Rahim, M., Douzane, O., Tran Le, A.D., Promis, G., Langlet, T.
Format: Article
Language:English
Subjects:
Aggregates (Building materials)
Analysis
Engineering Sciences
Hemp lime concrete
Hygric properties
Moisture buffer capacity
Moisture penetration depth
Permeability
Properties
Straw lime concrete
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Summary:•New bio-based material called “straw lime concrete” (SLC).•Experimental protocol validation (hemp lime concrete (HLC); the reference material).•Moisture properties characterization.•The both materials (SLC and HLC) exhibit an “excellent” moisture buffer capacity. The use of plant particles as aggregates in construction materials provide a very good hygric performance, and offers a real contribution to sustainable buildings. This paper focuses on the hygric properties of a new bio-based material called “rape straw lime concrete” in comparison with a “hemp lime concrete” which is used to validate the experimental protocol of this work. The tests are conducted on the sorption isotherm, the water vapor permeability, the capillary water absorption and the moisture buffer capacity which is estimated from the moisture buffer value determined under equilibrium condition. The results showed that the materials have very interesting hygric properties and exhibit an excellent moisture buffer capacity.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2015.11.021