Concrete is also known as an artificial stone as it possesses many similar characteristics of … Concrete has high compressive strength but limited tensile strength, and rebar corrosion can cause concrete to spall. Write short notes on (i) Sulphate attack (ii) Carbonation Sulphate attack: o Found in ground water and sub soil. Concrete Basicsaims to provide a clear, concise explanation of all aspects of making quality concrete; from the Materials and Properties involved through Planning, Preparation, Finishing and Curing. Concrete is the most widely man-made construction material. are 2.65 and 2.7 respectively. Cement: raw materials, manufacture, composition and types, special cements, hydration, tests of cement, paste and mortar (lecture 1, 2 and 3) (5 hours). o Increase in volume of cement paste in concrete due to presence of sulphur containing chemicals. CIV-E1010 Building Materials Technology (5 cr) (3/31) 5.1 Basic ingredients of concrete Concrete is a mixture of cement, water, fine aggregate (sand) and coarse aggregate (gravel or crushed rocks) in which the cement and water have hardened by a chemical reaction – hydration – to Step 01: Data to be collected Design a concrete mix for construction of an elevated water tank. Portland Cement Portland cement is made by mixing substances containing CaCO3 with substances containing SiO2, Al2O3, Fe2O3 and heating them to a clinker which is subsequently ground to powder and mixed with 2-6 % gypsum Raw Materials Necessary for Portland Cement Manufacture … Compound Composition of Clinker / Cement Four major compounds formed from the oxides under high temperature in the kiln Name (Oxide Notation) - Shorthand Tricalcium silicate (3 CaO.SiO 2) – C3S Dicalcium silicate (2 CaO.SiO 2) – C2S Tricalcium aluminate (3 CaO.Al 2O 3) – C3A Tetracalcium aluminoferrite (4 CaO.Al 2O 3. • Portland cement hardens and adheres after being mixed with water. It is a mixture of cement, water, sand and gravel or crushed aggregates. Water: mixing and curing requirements, tests ( lecture notes) (one hour). THE CEMENT MANUFACTURING PROCESS Prof. Dr Elshafie Ahmed Gad Faculty of Applied Science Chemistry Dept. The dry … History of Cement: • The term “Portland cement” was first used in 1824 by Joseph Aspdin, a British cement-maker, because of the resemblance between concrete made from his cement and Portland stone, which was commonly used in buildings in Britain. Important Notes – Concrete Page 1 IMPORTANT NOTES Concrete INTRODUCTION Concrete is the world’s most widely used construction product that consists of mainly Portland cement mixed with sand, water and gravel. Except as otherwise shown, reinforcing shall be detailed in accordance with the latest ecfltion of the ACI Detoifing Manual and Instolled in accordance with the lotest edition of the CRSI Placing Manual. PDF | On Dec 9, 2015, Momen Marwan Mohsen published Cement Manufacturing | Find, read and cite all the research you need on ResearchGate Basil Salah ١ Chapter Two Types of Cement . Concrete Technology / ch.2 Dr. GENERAL NOTES - CONCRETE 1. The mixture when placed in forms and allowed to cure becomes hard like stone. REINFORCING. Concrete Basicsaddresses the needs of unskilled and semi-skilled persons undertaking general concreting projects including home and handyman projects. • Portland cement is a generic name , not a trade name , and has nothing to do with Portland • Modern Portland cement was invented in the 19th century , but related materials have been used in construction since Roman times • Mortar is a mixture of cement and sand • Concrete is a mixture of mortar and The specified design strength of concrete is 30 MPa at 28 days measured on standard cylinders. The properties of cement during hydration vary according to: Chemical composition Degree of fineness It is possible to manufacture different types of cement by changing the percentages of their raw materials. The specific gravity of FA and C.A. Fe 2O 3) – C4AF
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