An experimental investigation was conducted on the durability of recycled aggregate concretes with the water to binder ratios of 0.26 and 0.60, including chloride ion penetration resistance test,freezing-thawing resistance test and water penetration resistance.Natural aggregate, recycled aggregate untreated and recycled aggregate treated by sulfuric acid solution, were employed.Results indicated that, 3 mol/L acid concentration and the 7 days soaking duration was the optimum to remove the attached mortars in recycled aggregate, and its removal rate could reach to 90.8%.