Effect of Using Recycled E-Waste Plastic as Coarse Aggregate with Supplementary Nano-fills in Concrete

Abstract

Abstract Last few decades have witnessed significant amount of plastic consumption due to the population growth as well as urbanization. The main goal of this research is investigating the utilization of waste plastic as an alternate for traditional natural aggregate in construction materials. To accomplish the objective of this study, seven distinct mix proportions were utilized. The mix includes control, varying percentage of plastic coarse aggregate (PA). In addition, nano-silica (NS) was utilized to partially replace the cement by weight of 5%. The different parameters of concrete including fresh and hardened state alongside stress -strain behavior, Poisson’s ratio and microstructure were examined. The findings revealed that NS shows negative effect on workability but plastic aggregate in concrete exhibits enhancement in workability. However, substituting natural aggregate with plastic aggregates results in a reduction of approximately 33% in compressive strength and 34% in tensile strength. Meanwhile, the inclusion of NS enhanced the strength with modified micro structure. In conclusion, the partial substitution of natural aggregate with plastic aggregate demonstrated promising performance, underscoring its potential contribution to the advancement of sustainable concrete production.

Keywords

• Construction materials
• Waste plastic
• Nano-silica
• Plastic aggregate
• Thermal conductivity