Effect of Waste Paper Ash on the Strength of Concrete

Abstract

The two challenging tasks for a civil engineer in the field of concrete technology are the strength and economy of the concrete. It is required to get maximum strength of concrete with least expenses. In this study waste paper ash was incorporated in concrete to achieve the task. Paper ash was incorporated in three different ratios of 3%, 6% and 9% as a replacement for cement. The results were obtained at 7 and 28 days. The results show that the compressive strength, tensile strength and flexural strength increased by replacing cement with paper ash up to 6%, but reduced on 9% paper ash replacement. The comparisons with the control samples at 28 days indicated that compressive strength increased by 10.76%, split tensile strength increased by 6.36% and flexural strength increased by 7.63%. The results demonstrate that paper ash collectively improve all the strengths effectively especially the compressive strength