Concrete | CIVE 3623 - ENGR MATERIALS LAB, Quizzes of Civil Engineering

Download Concrete | CIVE 3623 - ENGR MATERIALS LAB and more Quizzes Civil Engineering in PDF only on Docsity! TERM 1 Portland Cement manufacturing DEFINITION 1 Calcareous & Argillaceous rock are crushed Finely ground and blend together blend in kiln oven allowing chemical reaction to form clinker Clinker is cooled and mixed with gypsum blend material to required fineness TERM 2 Portland Cement Chemical Composition DEFINITION 2 C3S - Tricalcium Silicate C2S - Dicalcium Silicate C3A - Calcium Aluminate C4AF - Calcium Aluminoferrite CaO - Calcium Oixde MgO - Magnesium Oxide TERM 3 Crystals DEFINITION 3 Backbone of strength CH & CSH TERM 4 Interlayer hydration spce DEFINITION 4 voids in the crystals smallest void type does not affect strength May affect durability properties (impermeable voids) water is chemical bond via hydrogen bonds water may be removed below 11% moisture content resulting in drying shrinkage TERM 5 Capillary Voids DEFINITION 5 space between crystals size varies with initial w/c (10-50 nm) Decrease strength increase permeability (permeable voids) Voids greater than 50 nm will not cause drying shrinkage when water is removed