Coffee grounds power, a greener future concrete

A groundbreaking study published in the Journal of Cleaner Production reveals that spent coffee grounds (SCG) can enhance concrete performance while addressing key environmental issues. Researchers found that when SCG is treated through pyrolysis at 350°C, it transforms into a biochar (350CBC) capable of replacing up to 15% of sand in concrete mixes. The result? A 29.3% increase in compressive strength and improved curing and microstructure.

This innovation tackles two major challenges: reducing reliance on natural sand, which harms riverbeds and ecosystems, and diverting organic waste from landfills, where it emits harmful methane. The biochar’s porous structure allows it to store and gradually release water, optimizing concrete setting.

With over 9 million tons of coffee waste produced globally each year, this circular approach could revolutionize sustainable construction, which could be a promising path for drillers, sawers, and the entire concrete sector toward a greener industry.

Read the complete article, and, if you want to learn more about the industry, read the IACDS Industry Report 2024

Links

• Article: Transforming spent coffee grounds into a valuable resource for the enhancement of concrete strength

• IACDS Industry Report 2024