Reutilisation of hazardous spent fluorescent lamps glass waste as supplementary cementitious material

Abstract Spent fluorescent lamps glass (SFLG) waste, manually and mechanically processed in a waste treatment plant, was used to partially replace up 50 wt% Portland cement (PC). Both types exhibited similar pozzolanic activity. The mortars containing 35 wt% SFLG met the specifications for other materials (e.g. fly ash) and, after 90 curing days, their compressive strength values were or higher than those of 100% PC sample (58.8 MPa). Our results provide an alternative reutilization process this hazardous reuse as-received (no washing reduce mercury) contributes less use.