Fluvial Sediments as SCMs: Characterization, Pozzolanic Performance, and Optimization of Equivalent Binder

This paper presents an assessment of recycling thermally treated fluvial sediments as a supplementary cementitious material (SCM). Different calcination treatments were conducted with temperatures ranging between 450°C and 950°C. For each calcined sediment, detailed characterization was carried out. Subsequently, blended cements containing 25% (CS) prepared tested, including portlandite consumption, hydration kinetics, compressive strength development (41 52 MPa at 7 90 days, respectively). The results showed that cement based on CS 750°C provided the most favorable kinetics highest strength. An optimization design experiment followed to maximize substitution rate CS. resulting multivariable function suggests replacement up 20% produce equivalent CEM II 52.5 N, 30% 42.5 N. reported technoenvironmental findings corroborate use SCMs motivate future research their effect concrete properties.