In whole nation, concrete production events are enchanting abode on vast scale. Natural sand (river sand) is unique of the main requirements of concrete and it is pretty demand and exclusive. Manufactured sand (M-sand) is a standby of river sand for concrete assembly which is produced from rigid granite pebble by devastating. Eco-sand is fine particles which is outgrowth from cement trade. Effective use of this waste material should be done for cost efficiency. The present study is about the compressive strength of concrete block with limited surrogating of M-sand by Eco-sand. The conventional river sand is replaced with M sand and partial amount of silica sand Replacement of M-sand by Eco-sand at various percentages 0%, 6%, 12% 18%, 24%&30% in PCC.It is verified that the finest spare percentage of M-sand by Eco-sand and the properties of fresh concrete and hard concrete in PCC with eco-sand. The comparison of economic advantages of m sand and eco sand. The main objective of this project is to reduce the air pollution and eco-friendly. The various proportions is carried out and tested.