The Greek Cement Industry. Structure and Mineralogical Composition of Cements. Cement Types, Composition and Uses. Raw Materials and Calculation of Raw Mix Composition. Size Reduction Operations. Pyroprocessing Technology. Hydration of Cements. Metallurgical Processes in Cement Production. Chemical Behavior of Cement in Production and Use of Concrete. Methods of Aggregates production. Test Methods for Aggregates Materials for Proper Concrete (Particle Size Composition, Shape, Mineralogical Characteristics, Strength, etc.). International and Greek Standards for Cement Testing. Environmental Aspects of Production and Use of Cement and Concrete.