Abstract
Bio-sourced materials combined with a polymer matrix offer an interesting alternative to traditional building materials. To contribute to their wider acceptance and application, an investigation into the use of wood-polymer composite boards is presented. In this study, biocomposite boards (BcB) for the building industry are reported. BcB are fabricated using a dry incorporation method of corn starch (CS) and hemp shiv (HS) treatment with water at 100 °C. The amount of CS and the size of the HS fraction are evaluated by means of compressive bending and tensile strength, as well as microstructure. The results show that the rational amount of CS independently of HS fraction is 10 wt.%. The obtained BcB have compressive stress at 10% of deformation in the range of 2.4–3.0 MPa, bending of 4.4–6.3 MPa, and tensile strength of 0.23–0.45 MPa. Additionally, the microstructural analysis shows that 10 wt.% of CS forms a sufficient amount of contact zones that strengthen the final product.
Highlights
Wood and polymer-based composites are low-carbon and environmentally-friendly materials.They have many advantages, such as a lightweight, corrosion resistance, dimensional stability, and recyclability, and are widely used in outdoor construction, logistics, decoration, and so on [1].Even though hemp concrete is characterised by sufficient thermal insulating properties (from 0.05 to 0.13 W/(m·K) [2]), it is not resistant to mechanical impact
The results showed that the compressive strength varied from
Same mannercomposites has been observed for some porous thermalare thermal insulating materials limeThe and
Summary
Wood and polymer-based composites are low-carbon and environmentally-friendly materials.They have many advantages, such as a lightweight, corrosion resistance, dimensional stability, and recyclability, and are widely used in outdoor construction, logistics, decoration, and so on [1].Even though hemp concrete is characterised by sufficient thermal insulating properties (from 0.05 to 0.13 W/(m·K) [2]), it is not resistant to mechanical impact. Wood and polymer-based composites are low-carbon and environmentally-friendly materials. They have many advantages, such as a lightweight, corrosion resistance, dimensional stability, and recyclability, and are widely used in outdoor construction, logistics, decoration, and so on [1]. After conducting compressive strength tests on hemp shiv (HS) and lime-based composites, [3,4] obtained values of 0.20–0.50 MPa and from. Other authors [5] tested composites from HS and different classes of hydraulic lime. The experimental results of the composites, which were hardened for 28 days at 20 ◦ C and 50% relative air humidity, showed that the compressive strength of such composites ranges from 0.10 to 0.31 MPa when the density is 460–480 kg/m3.
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