UNIT – I: Cement Portland cement - chemical composition - Hydration, Setting of cement - Structure of hydrate cement - Test on physical properties - Different grades of cement. Admixtures: Types of admixtures - mineral and chemical admixtures. (Chapter - 1) UNIT – II: Aggregates Classification of aggregate - Particle shape and texture - strength and other mechanical properties of aggregate - Specific gravity, Bulk density, porosity, adsorption and moisture content of aggregate - Bulking of sand - Deleterious substance in aggregate - Soundness of aggregate - Alkali aggregate reaction - Thermal properties - Sieve analysis - Fineness modulus - Grading curves - Grading of fine, Manufactured sand and coarse Aggregates – Gap graded aggregate – Maximum aggregate size – Properties Recycled aggregate. (Chapter - 2) UNIT – III: Fresh Concrete Workability - Factors affecting workability - Measurement of workability by different tests - Setting times of concrete - Effect of time and temperature on workability - Segregation and bleeding – Mixing, vibration and revibration of concrete - Steps in manufacture of concrete - Quality of mixing water. (Chapter - 3) UNIT – IV: Hardened Concrete Water / Cement ratio - Abram’s Law - Gelspaoe ratio – Gain of strength of concrete - Maturity concept - Strength in tension and compression - Factors affecting strength - Relation between compressive and tensile strength - Curing. Testing of Hardened Concrete: Compression tests - Tension tests – Factors affecting strength - Flexure tests - Splitting tests - Pull-out test, Non-destructive testing methods - codal provisions for NDT. Elasticity, Creep and Shrinkage - Modulus of elasticity - Dynamic modulus of elasticity Poisson’s ratio - Creep of concrete - Factors influencing creep - Relation between creep and time - Nature of creep - Effects of creep - Shrinkage - types of shrinkage. (Chapter - 4) UNIT – V: Mix Design
