The use of fly ash and metakoalin in concrete is phenomenal due to superior pozzolanic action which accounts for the strength gain and reduction in concreting cost. Recently there has been a great demand for high quality concrete structures with high performance. The present study aims the influence of fly ash and metakoalin on the hardened properties of concrete. The strength properties of compressive, split tensile and flexural strength and electrical resistivity of ternary blend concrete mixes has been tested at different ages. The addition of metakaolin to concrete mix improves the early age strength. The electrical resistivity values of different concretes measured at different ages. Prediction of electrical resistivity of ternary mixes at 28 day has an error of 4-5%. © 2015, Sphinx Knowledge House. All rights reserved.