Cement Production and Composition: Terms and Definitions, Quizzes of Civil Engineering

Download Cement Production and Composition: Terms and Definitions and more Quizzes Civil Engineering in PDF only on Docsity! TERM 1 Raw Material/Source Lime, CaO DEFINITION 1 Pure Limestone TERM 2 Raw Material/Source Ferric Oxide, Fe2O3 DEFINITION 2 Shale TERM 3 Raw Material/Source Silicia, SiO2 DEFINITION 3 Sand TERM 4 Raw Material/Source Alumina, Al2O3 DEFINITION 4 Clay TERM 5 Production DEFINITION 5 Raw materials are ground and fired in a kiln to a temperature of 1425 to 1650 C; This produces clinker; Clinker is ground to 100% passing the #200 sieve (74 m); Gypsum (CaSO42H2O) is added. TERM 6 Major Compounds DEFINITION 6 Tricalcium Silicate: C3S Dicalcium Silicate: C2S Tricalcium Aluminate: C3A Tetracalcium Aluminoferrite: C4AF TERM 7 Rates of Hydration DEFINITION 7 Rapid Tricalcium Aluminate C3A Tetracalcium AluminoferriteC4AF Slow Tricalcium Silicate: C3S early age strength gain Dicalcium Silicate: C2S later age strength gain S TERM 8 Flash set DEFINITION 8 initial set in less than 1 hour, heat released, too little gypsum to reduce the rate of hydration of C3A TERM 9 False set DEFINITION 9 initial set in less than 1 hour, little heat released, too much gypsum TERM 10 CSH DEFINITION 10 calcium silicate hydrate not soluble in water solid hydration product high suface area high Vander Walls Force --> Strength Volume %: 50 to 60