Cow Dung Ash is an additive that can be added in concrete for an increase in durability, workability, and strength of concrete using Portland Pozzolana cement (PPC). Partial replacement with PPC which varies from 1% to 10% at various proportionate with cement for M20& M25. All mix of concrete was examined for slump test and compressive strength for 3 days, 7days and 28 days. A Result test was found efficiently at 5%Partial Replacement of Cow Dung Ash as compared with other proportionate for M20 and M25 grade of concrete. 28 Days Compressive strength observed was 21.45 N/mm2 in M20 is good as per Indian code specification.  28 Days Compressive strength observed for M25 is 26.85 N/mm2 which is good. Cow Dung Ash acts as an additive and substituent for better strength and performance. Cow Dung Ash is manufactured by waste material of Cow solid waste drying and then burning and then collection its ash. Additive use here is part of waste material so the process is ecofriendly.

Keywords: Cow Dung Ash, PPC, M20 (Concrete Mix of 20 Grade), M25, Substituent Concrete.