Experimental investigation of the incorporation of trivalent chromium-contaminated activated carbon into cementitious materials

This study proposes to investigate the incorporation of trivalent chromium-contaminated activated carbon into cementitious materials as a potential solution for waste management and materials improvement. The research explores the effects of varying the content of polluted activated carbon on the mechanical properties of cement-based mortars. Activated carbon, known for its adsorptive properties, was treated to contain varying concentrations of trivalent chromium and subsequently integrated into cement matrices at different percentages (1%, 2%, 5% and 8%) by weight. Experimental results reveal that the addition of activated carbon significantly improves the compressive strength and flexural strength of mixes, thus mitigating environmental risks. Microstructural analyses, performed by scanning electron microscopy (SEM) and FTIR, indicate improved interfacial bonding and pozzolanic activity thanks to activated carbon's unique properties. This study demonstrates the viability of using chromium-contaminated activated carbon as a sustainable material in construction, promoting the circular economy while addressing the challenges of contamination in the cement industry.