Ahmed, et al (2024) Development of Multifunctional Cementitious Composite Using BiocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More. Journal of Building Engineering. https://doi.org/10.1016/j.jobe.2024.110598

A recent study published in the Journal of Building Engineering explores the development of multifunctional cementitious composites using biochar. This research focuses on biochar as an eco-friendly and cost-effective additive to concrete, aimed at improving mechanical properties, enhancing self-sensing capabilities, and increasing carbon sequestration.

Biochar, a carbon-rich material derived from biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More through pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More, is presented as an alternative to traditional, expensive conductive fillers like carbon fibers. The study shows that adding biochar to cement in proportions of 5%, 10%, and 15% can significantly increase compressive strength—by up to 51.17% at the highest concentration. However, it also reduces ductility due to the porous nature of biochar at these higher levels.

Moreover, the research highlights the potential of biochar to improve self-sensing capabilities. For instance, a 10% biochar mix correlated strain with changes in electrical resistivity, showcasing its potential for structural health monitoring. Additionally, biochar-enhanced composites demonstrated a 70% higher CO2 absorption rate, contributing to sustainability goals by reducing the carbon footprint of concrete.

This study underscores the potential of biochar as a multifunctional material in construction, suggesting that it could play a vital role in advancing sustainable building practices and reducing greenhouse gas emissions. By integrating biochar into cementitious composites, the construction industry can achieve more durable, self-monitoring, and environmentally friendly structures.