Study The Effect of Coal Bottom Ash on Partial Replacement of Fine Aggregate in Concrete With Sugarcane Molasses as an Admixture

Abstract

Due to increasing construction activities, there has been a huge environmental impacts especially the risks related to depletion of river bed and its consequent effect on the aquatic life, natural water table and over all ecology of the system. Various replacements of sand is a hot research topic worldwide. Thermal power plant coal bottom ash is a waste material if used as construction material will contribute to sustainability. Advantages of using coal bottom ash are that, it will give us an eco-friendly concrete and cost of dumping these waste material also decreased, thus serving the need of the hour. This paper investigates the effect of partial replacement of fine aggregate in concrete with coal bottom ash [CBA] with sugarcane molasses as admixture in concrete. The replacements at 0%, (10%), (20% ), (30%), (40%),(60%), (80%)  of fine aggregate with 0.01% of sugarcane molasses in each mix  are done at fixed water cement [W/C] ratio and fixed slump ranges. The result showed that at fixed W/C ratio the strength (compressive strength, flexural strength, split tensile strength ) and durability increased initially at  percentages of  (10%,), (20%), (30%) and (40%) and later  when the  percentage of replacement is increased as  (60%), and  (80% )  along with 0.01% of sugarcane molasses in each mix the strength and durability decreased.