Comparison of barley and lavender straws as bioaggregates in earth bricks

Marie Giroudon (1) , Aurélie Laborel-Préneron (1) , Jean-Emmanuel Aubert (1) , Camille Magniont (1)

1 LMDC - Laboratoire Matériaux et Durabilité des constructions

Nowadays, for environmental reasons, the demand for bio-based building materials is increasing. The number of studies focusing on earth building bricks with addition of plant aggregates is growing. In this study, barley and lavender straws were considered as bioaggregates in an earth matrix. Their characterization revealed distinct shape, size and porosity. Composites including 3% and 6% by mass of each bioaggregates were then elaborated. Their performances were investigated and compared in terms of mechanical and thermal properties, durability of the composite materials and resistance to fungal growth. The mixture with 3% of lavender straw showed satisfactory durability results while barley straw brought better thermal properties.

Mots clés: Durability; Mechanical property; Thermal property; Fungal growth; Earth bricks; Barley straw; Lavender straw

Domaines: Matériaux composites et construction

Marie Giroudon, Aurélie Laborel-Préneron, Jean-Emmanuel Aubert, Camille Magniont. Comparison of barley and lavender straws as bioaggregates in earth bricks. Construction and Building Materials, 2019, 202, pp.254-265. ⟨10.1016/j.conbuildmat.2018.12.126⟩. ⟨hal-02082763⟩