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Materials 2019, 12(8), 1199; https://doi.org/10.3390/ma12081199

Hemp-Straw Composites: Gluing Study and Multi-Physical Characterizations

1
Laboratoire Génie Civil et Génie Mécanique, Université de Rennes, BP 90422 Rennes, France
2
Institut de recherche en Génie Civil et en Génie Mécanique, Université de Nantes, BP 92208 Nantes, France
*
Author to whom correspondence should be addressed.
Received: 22 March 2019 / Revised: 7 April 2019 / Accepted: 9 April 2019 / Published: 12 April 2019
(This article belongs to the Special Issue Sustainability in Construction and Building Materials)
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Abstract

In order to meet the requirement of sustainable development, building materials are increasingly environmentally friendly. They can be partially or fully bio-based or recycled. This paper looks at the development of fully bio-based composites where agro-resources are valued as bio-based aggregates (hemp) and as binding materials (wheat). In a previous work, a feasibility study simultaneously investigated the processing and ratio of wheat straw required to ensure a gluing effect. In this paper, three kinds of hemp-straw composites are selected and compared with a hemp-polysaccharides composite. The gluing effect is analyzed chemically and via SEM. The developed composites were characterized multi-physically. They showed sufficiently high mechanical properties to be used as insulating materials. Furthermore, they showed good thermal performances with a low thermal conductivity (67.9–69.0 mW/(m · K) at 23 ° C, dry). View Full-Text
Keywords: sustainable building materials; hemp shiv; wheat straw; green binders; porosity; thermal properties; mechanical properties sustainable building materials; hemp shiv; wheat straw; green binders; porosity; thermal properties; mechanical properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Viel, M.; Collet, F.; Prétot, S.; Lanos, C. Hemp-Straw Composites: Gluing Study and Multi-Physical Characterizations. Materials 2019, 12, 1199.

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