The experimental investigations has carried out to identify the effect of use on bottom ash which is replacement for fine aggregate. By adding the bottom ash in Concrete can be improved the strength and the cost of the concrete will be reduced. The waste materials which is extracted from the thermal power plant is harmful for human health so by using this materials in the concrete will be an eco-friendly for the environmental. Even though the cost of the sand is high by using the bottom as the cost will reduce up to 20%. The different types of strength and the properties of the concrete has been identified. To find the strength two different types of concrete test has be consists of compressive strength and flexural strength of the concrete beam. To development the strength of the concrete different percentages of bottom Ash has been add 0%, 10%,20%, 30% and 40% has replaced with fine aggregates. The concrete has various age of curing like 7days and 28days with two different types of water one is normal water and the salt water for compressive strength. The strength and durability of the concrete has been identified in this research. © 2020 Elsevier B.V., All rights reserved.