Abstract
The accumulation of waste products and their disposal is among the primary issues that have emerged as a result of industrialization. Accumulation of industrial waste is a cause of environmental pollution too. In this research, the experimental study was performed on combined replacement with two waste materials i.e., copper slag and fly ash. The main aim is to obtain the optimal percentage of fly ash and copper slag substitutions with fine aggregates and cement respectively that have influence on concrete's mechanical characteristics. The concrete grade of M40 with fly ash replacing cement by 20% and copper slag substituting fine aggregate by 0%, 15%, 30%, 45% and 60% was employed in this study. The different aspects were considered to examine the combined effect of waste materials utilized in this investigation. It was observed that copper slag over 30% supplanting with fine aggregates decreased the qualities on the grounds that copper slag has a very low water retention rate. Additionally, the outcome reveals that 20% fly ash supplanting as cement and 30% copper slag supplanting as fine aggregates demonstrated enhanced flexural strength, split tensile strength and compressive strength. The findings also revealed that the ultrasonic pulse velocity was highest for the concrete with 20% fly ash and 30% copper slag substitutions.
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