Due to the advantages of RCC, the concrete has been widely used in construction of concrete road pavement. The most important properties of this type of concrete can be cited to early age high-strength, high-speed performance and being economic. The use of cement as adhesive materials in RCC pavements and the growing need for cement production, according to the environmental impact of this material, including about 7 percent CO2 release in the atmosphere, considerable amount of energy consumption such as electricity and fossil fuel are inevitable and offer alternative products to the pursuit of sustainable development, is essential. One solution is replacing a percentage of cement with waste materials produced by plants. In this study, the effects of blast furnace slag powder (produced by Esfahan’s Mobarakeh Steel Company) on the mechanical properties, permeability, durability under cycles of freezing and thawing and water absorption were studied. Samples in this study were made based on the soil method and compaction was made by kongo hammer. The experiments were conducted in two phases. In the first phase with the two values of cement (12 and 15 percent by weight of dry aggregates), four amounts of slag (including 0, 20, 40 and 60 percent by weight of cementitious materials have been replaced with slag) and five moisture contents of (4, 4.75, 5.5, 6.25 and 7 percent by weight of aggregates and cementitious materials) to determine the optimum moisture content required for the original mixing designs referred to this research were allocated. At this phase of the experiments, the number of 120 cubic 150×150×150 mm were made and evaluated. Then, using the optimum moisture content, two values of cementitious materials and 4 values of slag, the original samples were made. In the second phase of experiments, the compressive strength samples were made with different moisture. The behavior of the original samples made with optimum moisture content obtained in the first stage was considered. The samples include compressive samples in both age 28 and 90 days (48 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) and permeability (48 specimens of 120×200×200 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 (24 cubic samples of 150×150×150 mm). According to the obtained results, by increasing slag percentage, the amount of moisture which is needed to achieve maximum density increase. Highest mechanical strength obtained in the samples containing 40% slag, which in all resistance samples were equal or greater than the samples without slag. In general, by increasing slag content, water absorption decreases which is enhanced by increase of cement from 12 to 15 percent. Permeability in the mixe designs containing 20 and 40 percent slag is reduced and in mixe designs containing 60% slag is increased. Also increasing cementitious material from 12 to 15 percent, reduces permeability. The most damaging effect of the concrete from 150 and 300 cycles freezing-thawing, with 40 percent of slag was observed in mixe designs containing 40% slag and ones containing 60% slag, decreasing resistance under freeze and thaw was improved. Key words: RCC pavements, blast furnace slag powder, mechanical properties, durability, permeability, water absorption.