Turhan Bilir is a professor at the Department of Civil Engineering,İstanbul University Cerrahpaşa, İstanbul, Turkey. He worked as an assistant professor and after that as an associate professor at the Department of Civil Engineering, Bülent Ecevit University, Zonguldak, Turkey. He received his B.Sc. degree from Eskisehir Osmangazi University, M.Sc. degree from Zonguldak Bülent Ecevit University and his Ph.D. degree from Eskisehir Osmangazi University, Turkey. His research interests include concrete durability, recycling in cement and concrete production, utilizations of wastes and by-products in concrete industry, composite models, restraint drying shrinkage and cracking of concrete, and the detection and estimation of crack propagation for concrete and other materials .