AN EXPERIMENTAL INVESTIGATION ON M20 GRADE OF CONCRETE BY PARTIAL REPLACEMENT OF CEMENT WITH STONE DUST AND FINE AGGREGATE WITH CRUSHED FINE AGGREGATE

In the present experimental investigation stone dust (stone dust which is passing through 90 micron sieve) is used as partial replacement of cement by weight at varying percentages i.e., 10%, 20%, 30% respectively. The fine aggregate is replaced by crushed fine aggregate at varying percentages i.e., 25%, 50%, 75%, 100% respectively. The influence of Stone Dust and Crushed Fine Aggregate on compressive strength, split tensile strength, flexural strength of M20 grade of concrete is investigated. The test results of concrete prepared using different combinations of stone dust as replacement of cement and crushed fine aggregate as replacement of fine aggregate are compared with that of controlled concrete. Based on test results, it can be observed that the concrete prepared with a combination of 20% replacement of cement by stone dust and 50% replacement of fine aggregate by crushed fine aggregate posses improved properties compared to controlled concrete. The controlled concrete is M20 grade design mix using normal ingredients of concrete without any replacement.