This book is a collection of papers from the symposium honoring Professor Sidney Diamond of the School of Civil Engineering, Purdue University, one of the leading scholars in the field of concrete science. The volume contains: Chemical and physical aspects of mechanisms of hydration of cements; development of concrete microstructure and mechanical properties; and various aspect of mechanisms of concrete deterioration, including alkali-silica reaction (ASR), freezing-thawing, and corrosion of reinforcement. Includes Dr. Diamond's paper, "Concrete Porosity Revisited."