Performance Evaluation of Concrete with Cow Dung Ash and Rice Husk Ash as Cement Replacement.

Key Points

• The aim is to explore the effectiveness of Cow Dung Ash and Rice Husk Ash as partial substitutes for cement in M20 concrete mixtures.
• Conducted experiments using M20 concrete with 2.5–5% combined CDA and RHA as cement replacements.
• Measured compressive strength at 28 days and assessed workability of the mixtures.
• Optimum cement replacement of 2.5–5% with CDA and RHA showed improved compressive strength at 28 days.
• Workability decreased as the percentage of CDA and RHA increased, indicating a trade-off in material performance.