ABSTRACT
The use of coffee-blended wood biochar as a partial replacement for cement in concrete has gained attention for its potential to reduce carbon emissions and enhance sustainability in construction. Biochar, derived from pyrolysed organic materials such as coffee grounds and wood waste, offers a promising solution by sequestering carbon and reducing the reliance on energy-intensive Portland cement. By replacing a portion of cement with biochar by volume, the overall carbon footprint of concrete can be significantly lowered, contributing to carbon-neutral construction. Biochar’s porous structure and high surface area improve concrete’s mechanical properties, such as compressive strength and durability, while reducing the demand for raw cement. Additionally, the integration of coffee grounds in the form of biochar introduces further environmental benefits by repurposing waste materials that would otherwise contribute to landfill accumulation and greenhouse gas emissions.
