Effective utilization of waste paper sludge ash as a supplementary material for cement

Abstract

One of the main causes of carbon dioxide emissions, along with deforestation and the burning of fossil fuels, is the manufacture of cement. Another significant user of natural, untapped resources is the manufacture of concrete. About 7% of the planet's greenhouse gas emissions come from the cement industry. To address the environmental effects of cement manufacturing and the continued loss of natural resources, finding an alternative binding ingredient is vital to establish a sustainable concrete industry. This study shows how to combine waste paper sludge ash with various cement ratios to produce low-cost concrete. Waste paper sludge ash was used as an extra cementitious ingredient as a novel replacement for traditional concrete. In the current experiment, waste paper sludge ash was used as partial replacement of different proportions of (2.5%,5% and 7.5 %) to cement in concrete of M25 grade to test and study its durability, compressive strength, splitting tensile strength and flexural strength at 28 days. Using the results as a guide, it was found that waste paper sludge ash can replace cement up to 5% by weight. Test results show that adding waste paper sludge as a partial replacement of cement in concrete improved the performance of concrete in terms of strength.