This report investigates the effect of replacing aggregates with waste materials on the compressive strength of concrete. The research explores the potential of utilizing various waste materials, including construction waste, glass, plastic, rubber, and others, as partial replacements for concrete aggregate. The study reviews existing literature, identifies research gaps, and formulates research questions to guide the investigation. The methodology relies on secondary data and qualitative analysis, drawing from books, journals, and online resources. The project aims to provide comprehensive information on how different waste materials impact concrete's strength, promoting sustainability in the construction industry. The research considers various factors influencing concrete compressive strength, such as cement type, fine and coarse aggregate properties, water-cement ratio, and the use of superplasticizers. The report includes a detailed flowchart outlining the research process, from literature review to data analysis and conclusion. The findings are intended to contribute to the development of eco-friendly construction practices by converting waste materials into valuable resources. The report is a draft proposal submission for the ENGIN3001 course at Federation University.