Kalderis, et al (2024) Utilization of 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 from olive tree pruning as additive to cement mortars. Journal of Cleaner Production. https://doi.org/10.1016/j.jclepro.2024.143137

A recent study published in the Journal of Cleaner Production explored the potential of using biochar derived from olive tree pruning as an additive to cement mortars. This research aimed to find a sustainable use for olive tree prunings, a significant agricultural waste in the Mediterranean region, by converting it into biochar and incorporating it into cement.

The study tested the effects of adding biochar at 2% and 5% weight rates to cement mortars. The results were promising. Adding 2% biochar reduced the setting time by 51 minutes and decreased the porosityPorosity of biochar is a key factor in its effectiveness as a soil amendment and its ability to retain water and nutrients. Biochar’s porosity is influenced by feedstock type and pyrolysis temperature, and it plays a crucial role in microbial activity and overall soil health. Biochar More by 27.8% compared to the control. The 5% addition resulted in a 29.7% increase in compressive strength and a 13.3% increase in flexural strength. These improvements were compared to a commercial hardwood biochar, which also showed beneficial effects but with some differences in performance.

The conversion of olive tree prunings to biochar not only offers an effective way to manage this agricultural waste but also enhances the properties of cement mortars, contributing to better durability and strength. Additionally, this approach aligns with circular bio-economy principles by promoting carbon sequestration and reducing harmful emissions associated with traditional open burning of prunings.

Overall, incorporating biochar from olive tree prunings into cement mortars presents a viable pathway for sustainable waste management and the development of improved construction materials. This study underscores the potential environmental and practical benefits of such innovative uses of agricultural residues.