Due to the short history of the Deep Mixing Method (DMM) in Egyptthere is limited data on the improved properties of Port Said clay. In addition, there are enormous amounts of by-products fro m cement, marb le and limestone industries that need to be employed instead of being environmentally harmfu l materials.This paper aims to bridge the gap of limited data about the effectiveness of dry mixing method to improve strength properties of Port Saidclay using common binders, cement and lime. In addition, the effectiveness of using cement waste, limestone waste and marble powder to partially or fully rep lace cement and limein the dry mixing method was examined.To achieve this purpose, a large number of unconfined compression testsand limited number of triaxial tests were performed. Different binder"s contents and different mixing proportions between binders were blended to prepare specimens using soils representtwo different layers ofSouth Port Said clay. The results of testing specimens afterdifferent curing time showed that dry mixing method can effectively improve strength and stiffness of Port Said clay.It was also concluded that cement waste can partially or fully rep lace cement and lime to improve Port Said clay by dry mixing method whilewith marble powder and limestone waste can partially be used with less effectiveness.