By making use of the benefits of moderately substituting concrete aggregates with rubber, rubberized concrete is commonly utilized in construction to improve several concrete qualities and offer an ecologically friendly alternative. This study examined the experimental investigation of incorporating crumb rubber (CR) as a substitute for traditional coarse aggregate in concrete by assessing its effects. Rubber was added to concrete samples in varying amounts (0%, 5%, 10%, 15%, and 20%). Additionally, the stainless-steel fibers impact was studied. The slump test results as well as the mechanical characteristics were explored. The compressive strength of cylinders made of rubberized concrete was found to have decreased. However, compared to traditional concrete, less unit weight and more hardness were attained. The development of constitutive expressions to forecast the unit weight and compressive strength after adding the crumb rubber and steel fibers was presented.