S. Abubakri, J. Pizzillo, I. Mantawy, G. Lomboy
Keywords: sustainability, concrete, cement paste, mortar, building materials, low embodied cabron
Summary:Production of portland cement releases significant amounts of carbon dioxide into the atmosphere. Replacing cement entirely or partially in concrete can reduce greenhouse gas emissions, contributing to the global fight against climate change. The current ongoing study investigates eco-friendly cement paste by partially replacing cement with reclaimed cement obtained from demolished concrete structures. Cement paste specimens containing 0 to 20% reclaimed cement were prepared, and their fresh (rheology) and hardened properties were determined. Results show that replacing new cement with reclaimed cement by up to 20% has an insignificant effect on the properties of cement paste. For example, cement paste specimens containing 20% reclaimed cement show a compressive decrease of less than 5% compared to the control cement paste.