This volume contains papers on phase composition and quantitative x-ray powder diffraction analysis of Portland cement and clinker; neutron diffraction and neutron scattering studies of cement; scanning probe microscopy: a new view of the mineral surface; the stereological and statistical properties of entrained air voids in concrete: a mathematical basis for air void system characterization; fresh concrete rheology: recent developments; early age behavior of cement-based materials; transport mechanisms and damage: current issues in permeation characteristics of concrete; the use of silica fume to control expansion due to alkali-aggregate reactivity in concrete: a review; delayed ettringite formation in concrete: recent developments and future directions; use of durability indexes to achieve durable cover concrete in reinforced concrete structures; and microfiller partial substitution for cement.