Ali Delnavaz - Department of civil and surveying engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
Mohammad Reza Pezeshkian - Department of mechanical engineering, Takestan Branch, Islamic Azad University, Takestan, Iran

As regards if curing stops for some time and then resumes again, then strength gain will also stop and reactive, in this study with choose suitable curing conditions after improper first curing (recurring) for normal and silica-fume concrete, Effect of this curing conditions on strength and permeability was investigated. The results from tests such as compressive strength, capillary water absorption and water penetration under pressure, indicates that curing after 28 days for concretes with improper first curing, especially for silica-fume concretes could be effective and reduction permeability and increase compressive strength of concretes was observed

Recurring, Silica-fume, Compressive strength, Water penetration under pressure, Capillary Absorption