High Performance Concrete (HPC) now a days used widely in the construction industry worldwide. High performance concrete appears to be a better choice for a strong and durable structure. Normal and special materials are used to make these specially designed concrete that must meet a combination of performance requirements. In this project, investigations were carried out on strength properties such as compressive strength, split tensile strength and flexural strength of M40 grade of HPC mixes with different replacement levels such as 25%,30%,35% & 40% of cement by fly ash and 60%,65%,70%,75% &100% of stone dust with sand by adopting water-binder ratio of 0.35. Super plasticizer (BASF) is used for better workability for high performance concrete. The HPC mix, grade M40 concrete is designed as per IS: 10262-1982 IS: 456- 200, which is conventional. Mechanical characteristics like Compressive strength, Split-tensile strength, Flexural strength were examined. The result of these investigations demonstrates the strength characteristics of stone dust and the properties of fly ash based concrete mixes. Based on the results obtained, the replacement of 100% stone dust and 25% fly ash with 1.2% of super plasticizer which superior characteristics was arrived .The details of the investigations along with the results are presented in this report.