Concrete has a key role in construction. Study focus on workability of the concrete, Fine Aggregate is partially filled with crumb rubber and M sand, a part of cement is replaced with fly ash. In this investigation the crumb rubber is utilised in place of fine aggregate. The scrap tyre treatment is currently a serious issue against environmental pollution. India stud in forth position in the entire world for rubber tyre market world after china, Europe and the US. Fly ash and M sand is an industrial waste which is included in the concrete. In this investigation workability of concrete is conducted on M20 grade concrete by replacing river side sand with the M sand and crumb rubber at percentage of replacements 0 to 20% at an regular interval of 5%and Compare the results obtained by the modified concrete with the normal concrete.

Due to the auspicious attribute of concrete such as durability, availability, versatility, good compressive strength, it is one of the most commonly used Building materials throughout the world. The demand for infrastructural facilities is increasing day by day which creates a tremendous pressure on concrete as well as on natural aggregates. Apparently it becomes unavoidable to look for alternative materials. On the other hand, disposal of stone dust generated from stone crusher is becoming a problem. Substituting cement by stone dust will serve the waste management as well as the alternative material in concrete. Here in the the present study stone dust is used for partial replacement of cement in concrete by studying the strength property of concrete. The aim of this experiment is to find the maximum content of stone dust by partial replacement of cement. The percentage of stone dust by partial replacement of cement in concrete are (0%, 5%, 10%, 15%, and 20%) was studied; on M20 grade of concrete. The result of this present investigation indicates that the replacement of 10% of cement with waste stone powder attains maximum compressive, flexural and tensile strength. The optimum percentage for replacement of stone powder with cement and it is almost 10%cement for both cubes beam and cylinders and it also minimize the costs for construction with usage of stone powder which is freely or cheaply available more importantly.