Enhancing the Mechanical Properties of Hempcrete for Sustainable Construction
Research Poster Engineering 2025 Graduate ExhibitionPresentation by Wei Tong
Exhibition Number 25
Abstract
Currently, the construction industry relies mainly on non-environmentally sustainable materials such as fired clay brick, concrete, and steel, which significantly contribute to global carbon dioxide generation leading to environmental degradation. In response to mounting environmental concerns, there is a growing emphasis on developing and utilizing low-impact materials that mitigate the ecological footprint of construction activities. Bio-composites have emerged as promising alternatives, offering both environmental benefits and structural viability. Hempcrete, a bio-based composite is known for its sustainability but has limited structural capacity. This research investigates how to improve the mechanical properties such as compressive strength and also thermal resistance of hempcrete using new mixture formulas and innovate add-ons. Current studies show that while hempcrete exhibits extremely low compressive strength compared to conventional concrete, its thermal resistance makes it well-suited for energy-efficient wall construction. Furthermore, preliminary results also indicate that incorporating sand and advanced binders—such as magnesium oxide (MgO), nano silica, and pozzolanic additives—can significantly increase compressive strength under optimized conditions. These findings provide a foundation for further refinement of the properties for practical application. By addressing the limitations of the mechanical/thermal properties, this study aims to position hempcrete as a viable material for increased applications in modern, eco-conscious residential construction. By refining its mechanical properties, hempcrete could become a more competitive alternative to traditional materials while maintaining its environmental benefits. These findings contribute to the broader understanding of hempcrete’s potential in sustainable home construction, emphasizing its role in reducing carbon footprints while maintaining efficient building performance.
Importance
As demand for sustainable building materials grows, hempcrete presents a promising eco-friendly alternative due to its low carbon footprint and other properties. However, its limited strength has prevented widespread adoption as a load-bearing material. This research seeks to contribute toward addressing this challenge. This research is crucial as it explores methods to enhance the mechanical performance of hempcrete, particularly its compressive strength, while preserving its excellent thermal resistance. By incorporating innovative binders such as magnesium oxide, nano silica, and pozzolanic additives, this study provides a pathway for hempcrete to a viable alternative for modern, energy-efficient construction. The findings contribute to advancing green building technologies, reducing carbon footprints, and promoting more sustainable residential construction practices.