The construction sector is among the largest contributors to worldwide carbon emissions, mainly due to the dependence on cement, concrete, and other energy-intensive materials. Recent developments in bio-based materials, particularly mycelium composites, have demonstrated their potential as lightweight, insulating, and sustainable alternatives. Mycelium presents unique benefits such as biodegradability, low density, and inherent thermal insulation; however, its mechanical strength and resistance to water remain notable challenges. Conversely, calcium carbonate (CaCO₃) is a widely available mineral with established uses in construction as a reinforcing and stabilizing agent.This research proposes the creation of a carbon-negative bio-brick through the incorporation of mycelium with calcium carbonate. The innovation of the method lies in improving both structural and functional characteristics of mycelium composites while enabling additional carbon sequestration capacity via CaCO₃. The experimental framework involves varying substrate types and CaCO₃ proportions, followed by evaluation of compressive strength, density, thermal conductivity, and water absorption. Comparative assessments with conventional construction materials are also provided to emphasize performance benefits.The anticipated results include enhanced mechanical properties, decreased water uptake, and superior thermal insulation relative to pure mycelium composites. More importantly, the material is expected to act as a carbon sink, providing dual advantages of lowering construction-associated emissions and actively capturing CO₂. By integrating biological growth with mineral reinforcement, this study introduces a sustainable pathway toward carbon-negative construction materials. This work highlights the potential of bio-based materials in advancing carbon-neutral strategies within the construction sector.
Fares Akl (Thu,) studied this question.