Chloride penetration resistance, Electrical resistivity and compressive strength of concrete with fly ash, limestone powder and partial replacement of fine aggregate by bottom ash

Abstract

The paper aims to study compressive strength, chloride penetration resistance and electrical resistivity of concrete with fly ash and bottom ash as partial replacement of fine aggregate. Ordinary Portland cement was used as a main cementitious material. The water to binder ratio was employed at 0.45 and 0.55. The fly ash to binder ratio was kept at 0.30 and 0.50. The limestone powder to binder ratio was kept 0.10. Fine aggregate was partially replaced by bottom ash at the replacement ratio of 0.10 and 0.30. Specimens were cured in tap water until 28, 56 and 91 days, then compressive strength and chloride penetration were performed. From the experimental results, it was found that concrete with bottom ash replacement ratio of 0.10 has higher compressive strength than concrete without bottom ash and concrete with bottom ash replacement of 0.30. Chloride penetration test concrete with bottom ash replacement of 0.10 and fly ash to binder ratio of 0.30 has the highest chloride penetration resistance.  Moreover, concrete with 50% of cement replacement by fly ash and 10% of fine aggregate replacement by bottom ash has the best electrical resistivity at 510 days..