The roller compacted concrete is a rugged pavement that should be able to withstand the traffic loads which are applied to it and like other concrete are in danger of being damaged. The roller compacted concrete is more likely to be used in areas where excessive load or high tensions are imposed on the pavement. In this case, the mechanical and durability parameters are of great importance. In this research, the mechanical performance of concrete with cement type 2 was investigated by replacing 0, 20, 40 and 60% of slag powder with a cement as a cementitious material and replacing slag of high furnace with calcium carbonate powder as part of fine grained used.The mechanical strength parameters performed include compressive strength, Brazilian tensile strength test and four-point bending strength. The specimens were include compressive specimens in three ages 7, 28 and 90 days(72 specimens of cubic 150×150×150 mm) and flexural specimens(48 specimens of 350×100×100 mm) and Brezilian tensile speciment(48 specimens of 300×150 mm), as well as for 150 and 300 cycles of freezing and thawing(24 specimens of 150×150×150 mm and 24 specimens of 350×100×100 mm) and for water absorption of 28 days (48 cubic samples of 150×150×150 mm) and salt scalling(48 specimens of 350×200×100 mm). The results of this study show that with the replacement of 20% of the slag powder at the age of 7, 28 and 90 days has the highest compressive strength, which is about 50% higher than conventional roller compacted concrete. The Brazilian tensile strength and rupture modules of the specimens made at the age of 28 and 90 days were measured by replacing 20 and 40% of the slag powder with the cement, increasing the tensile strength by about 50% and increasing the flexural strength by about 25% more than the ordinary concrete was observed. With adding slag of high furnace in two types of sand and overheads in percentages between 20% and 40% showed significant improvements in durability parameters. Keywords: RCC pavement, salt scalling test, mechanical strength, freezing and thawing cycles, water absorption