Recycled Glass Powder and Eggshell Powder as Supplementary Cementitious Materials in Concrete for a Global Shift Towards Sustainable Production
Résumé
Solid waste management presents a significant global challenge, demanding innovative and sustainable solutions. Recycling waste into construction materials is a promising approach for sustainable development. Eggshells and glass wastes can be recycled to recover valuable materials. This study investigates the amalgamation of these two waste materials for partial cement replacement in mortar and concrete and focuses on the impact of varying recycled glass particle (GP) size within concrete mixtures containing 75 μm eggshell powder (ESP). Mortar specimens were prepared with a 1:3:0.5 cement: sand: water ratio, incorporating 10% and 15% (by weight of cement) of treated and untreated ESP, along with recycled GP. Results indicated that a 10% cement replacement ratio yielded optimal compressive strength. Notably, mortar containing 10% recycled GP (75 μm) exhibited superior compressive strength compared to ESP of the same size. Interestingly, calcination treatment of ESP did not significantly impact 28-day compressive strength compared to untreated eggshell mortar. However, calcination appeared to accelerate the hydration process during casting. Based on these findings, subsequent concrete testing employed only 10% untreated ESP and GP as partial cement replacements. The investigation focused on the effect of GP particle size (45 μm and 75 μm) on the mechanical properties of the concrete mixtures. Concrete containing 75 μm GP achieved a higher compressive strength after 28 days compared to ESP of the same size. Further reduction of the GP particle size to 45 μm resulted in a significant increase in compressive strength (almost 50%) exceeding traditional concrete mixtures by 6%. However, this improvement came at the cost of reduced workability in the concrete mix. Similarly, ESP-GP mixtures containing GP of particle size 45 μm displayed increased compressive strength (27.6 MPa) compared to the ESP-GP mixtures containing particle size of 75 μm after 28 days. Additionally, the split tensile strength of the ESP-GP concrete mix also improved with the reduction of GP particle size. These findings suggest that incorporating recycled GP, particularly with a finer particle size (45 μm), presents a promising strategy for enhancing the mechanical properties of concrete containing ESP as a partial cement replacement.
Citer ce document
Accès au document
Texte intégral en lecture en ligne, réservé aux abonnés SPHAERO et aux membres de l'institution. Se connecter
Voir l'article sur le site de la revueAuteur(s)
Statistiques
Consultations : 1
Téléchargements : 0