Artificial Lightweight Aggregate from Different Waste Materials

摘要

Artificial lightweight aggregate (LWA) is produced using water reservoir sediment, spent glass, and diatomaceous earth in various compositions and sintering temperatures between 1020 degrees C and 1110 degrees C. This study prepared aggregate samples whose physical properties included bloating index (BI), water absorption capacity (WAC), apparent density, and compressive strength. Results showed that the morphology of the external aggregated samples, the number of pores increased as the sintering temperature rose, while the water adsorption capacity decreased with the increasing sintering temperature. Apparent density generally decreased with an increasing fraction of waste glass (WG) because average particle size of the WG was larger than spent diatomaceous earth, and water reservoir sediment. Furthermore, LWA with lower apparent density corresponded to a higher BI. According to analysis results, formulations of water reservoir sediment 50%, WG 40%, and spent diatomaceous earth 10% and water reservoir sediment 40%, WG 40%, and spent diatomaceous earth 20% aggregated samples can be used to produce artificial LWA for use as structural concrete.