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New Lime-Based Hybrid Composite of Sugarcane Bagasse and Hemp as Aggregates

Author

Listed:
  • Arlen Zúniga

    (Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal)

  • Rute Eires

    (Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal
    Centre for Territory, Environment and Construction (CTAC), University of Minho, 4800-058 Guimarães, Portugal)

  • Raphaele Malheiro

    (Centre for Territory, Environment and Construction (CTAC), University of Minho, 4800-058 Guimarães, Portugal)

Abstract

Bio-based materials help reduce the consumption of non-renewable resources, contributing to the development of sustainable construction. Industrial Hemp Concrete (IHC), which uses hemp stalk (HS) as an aggregate and a lime-based binder, is a bio-based material with various applications. This research developed a new hybrid composite in order to improve the mechanical strength and durability of hemp concrete, with the incorporation of sugarcane bagasse (SCB) as an aggregate, a resource of a renewable origin that is abundant in several countries. Different formulations were used, which were molded and pressed manually, evaluating their cohesion and compactness. The performance of the developed hybrid composite was measured considering mechanical, thermal, and durability properties. The compression test results showed an increase of 19–24% for composites with 75% hemp and 25% SCB. Thermal conductivity and thermal resistance coefficients were also improved, reaching 0.098 (W/m °C) and 0.489 (m 2 °C/W), respectively. This aggregate combination also showed the lowest water absorption coefficient (reducing by 35%) and the best performance in durability tests compared to IHC. The resistance to freeze–thaw is highlighted, increasing 400%. The main reason is the influence of the SCB addition because the short and thin fiber form helps to maintain the physical integrity of the composite by filling the spaces between the hemp aggregates.

Suggested Citation

  • Arlen Zúniga & Rute Eires & Raphaele Malheiro, 2023. "New Lime-Based Hybrid Composite of Sugarcane Bagasse and Hemp as Aggregates," Resources, MDPI, vol. 12(5), pages 1-20, April.
    • Handle: RePEc:gam:jresou:v:12:y:2023:i:5:p:55-:d:1134517
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    References listed on IDEAS

    as
    1. Ip, Kenneth & Miller, Andrew, 2012. "Life cycle greenhouse gas emissions of hemp–lime wall constructions in the UK," Resources, Conservation & Recycling, Elsevier, vol. 69(C), pages 1-9.
    2. Shazim Ali Memon & Israr Wahid & Muhammad Khizar Khan & Muhammad Ashraf Tanoli & Madina Bimaganbetova, 2018. "Environmentally Friendly Utilization of Wheat Straw Ash in Cement-Based Composites," Sustainability, MDPI, vol. 10(5), pages 1-21, April.
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