P. Kumar Mehta, Ph.D., is Professor Emeritus, Civil and Environmental Engineering, at the University of California at Berkeley. The recipient of the Berkeley Citation--the highest honor for contributions to his field and to the University--Dr. Mehta is an Honorary Member of the American Concrete Institute (ACI) and is a member of its Committee on Sustainable Development.

Paulo J. M. Monteiro, Ph.D., is Roy W. Carlson Distinguished Professor, Department of Civil Engineering, University of California at Berkeley and Faculty Scientist, Department of Materials, Lawrence Berkeley Laboratory. Dr. Monteiro is a Member of the American Society of Civil Engineers (ASCE) and of the American Concrete Institute (ACI). He has authored and co-authored numerous journal articles, conference proceedings, and reports in addition to having co-authored the Second and Third editions of Concrete: Structure, Properties, and Materials.