Performance Evaluation of Cow Bone Ash and Egg-Shell Ash on the Production of concrete

Abstract

Concrete is a composite material made with cement, aggregates and admixture in some cases. Due to day by day innovation and development in construction field, the global consumption of natural aggregate is very high. Extensive use of concrete leads to depletions of natural resources and high cost of construction material such as ordinary Portland cement for construction. therefore, this paper study the possibility of utilizing cow bone and egg shell ashes in production of concrete having sufficient qualities for construction. Partial replacement of cement by ashes from cow bones, and egg shell will not only provide affordable concrete, but also provide better way of managing the waste from the present nuisance it constitute to the environment. The chemical composition of cow bone and egg shell ashes and compressive strength of the concrete produced were determined. In this experimental study, cement is partially replaced by 0%CBA/ESA, 15%CBA/5%ESA, 20%CBA/0%ESA, 10%CBA/10%ESA , 15%ESA/5%CBA and 20%ESA/0%CBA respectively for production of concrete, using a mix ratio of 1:2:4 and a water cement ratio of 0.5was adopted. The concrete gave maximum compressive strength for each batch in the range of 31.26N/mm2,28.37N/mm2, 32.84N/mm2, 24.22N/mm2, 27.77N/mm2.and 22.87N/mm2 respectively at 28 days curing periods. From the result of 28 days curing, it can be concluded that although ESA and CBA are week pozzolanic materials, thus but can still replace cement up to 20% replacement of CBA only and 15% of CBA with 5% of ESA.