PARTIAL REPLACEMENT OF CEMENT BY WASTE PAPER PULP ASH AND IT’S EFFECT ON CONCRETE PROPERTIES

This study investigates the partial replacement of cement with waste paper pulp ash (WPPA) in concrete and its impact on concrete properties. The increasing demand for sustainable and ecofriendly construction materials has driven research into alternative materials that can partially replace traditional Portland cement. Waste paper pulp ash, a byproduct of the paper recycling industry, offers a potential supplementary cementitious material due to its pozzolanic properties, which could reduce cement usage and lower the environmental impact of concrete production. The research examines the effects of replacing cement with WPPA at varying percentages (e.g., 5%, 10%, 15%, and 20%) on key concrete properties, including workability, compressive strength, tensile strength, durability, and setting time. Experimental tests were conducted to evaluate the fresh and hardened properties of concrete containing WPPA, comparing these results to conventional concrete. Results indicate that WPPA has a significant impact on the workability and strength characteristics of concrete. Lower replacement levels generally maintained compressive and tensile strength comparable to control mixes, while higher replacement levels exhibited a gradual decrease in strength but showed improved resistance to chemical attacks. Additionally, WPPA inclusion in concrete contributed to reducing cement consumption, which aligns with sustainable construction practices by minimizing CO₂ emissions. This study highlights WPPA as a viable, sustainable alternative for partial cement replacement in concrete, particularly in applications where environmental considerations are prioritized. The findings contribute to the advancement of green construction materials and demonstrate the potential of incorporating industrial byproducts into construction, paving the way for future research on optimizing WPPA ratios for various structural applications.