Abstract: In this paper presents the test results of fresh and hardened properties of M25 grade concrete incorporating humic acid was added in 0.5%, 1.0%, 1.5% by weight based on the percentage of cement added. In split tensile strength of the cylinder and flexural strength of beam the maximum tensile strength is achieved in 0.5% of humic acid then the normal conventional concrete. Flexural strength was compared by testing of beams of size 1.0 x 0.15 x 0.2 m under two point loading. Results showed that there was no degradation of strength for beams with humic acid as replacement for the cement.