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Selection of cement

The type of cement selected should be appropriate for the intended use. Functional requirement of the structure, design parameters, speed of construction, durability characteristics, environmental condition are some of the major factors which affect selection of cement for appropriate application. The suggested uses of various cements are given in the following table.
S no Type of cement End Use
1 OPC 33 Used for general civil construction works under normal/mild environmental conditions. OPC 33 grade is normally not used where high grade concrete is required due to limitations of its strength. Nowadays this variety is not generally produced
2 OPC 43 Nowadays 43 grade is being used widely for general construction work. However, 43 grade OPC is gradually being replaced by blended cements.
3 OPC 53 Used in RCC and pre-stressed concrete of higher grades, cement grouts, instant plugging mortars etc. where initial higher strength is the criteria
4 Portland Slag Cement (PSC) PSC provides better protection against chloride and sulphate attack. PSC is preferred over OPC for usage in constructions where the structures are susceptible to sulphate and chloride attack. eg Marine structure, structures near the sea, sewage disposal treatment works, water treatment plants, etc
5 Portland Pozzolana Cement (PPC) PPC makes concrete more impermeable, denser as compared to OPC. The long-term strength of PPC is higher compared to OPC. PPC produces less heat of hydration and offers greater resistance to the attack of aggressive waters than normal OPC. PPC can be used for all types of construction.
6 Sulphate Resisting Portland Cement (SRC) IIn SRC, amount of C3A is restricted to lower than 5% and 2C3A + C4AF lower than 25%. SRC can be used for Foundation, Piles, Basements, Underground structures, sewage and water treatment plants and coastal works, where Sulphate attack due to water or soil is anticipated
7 Low Heat Portland Cement Low heat Portland cement is particularly suitable for making mass concrete for dams and many other types of water retaining structures, bridge abutments, massive retaining walls, piers and slabs, etc
8 Rapid Hardening Cement (RHC) The Rapid hardening cement is used for repair and rehabilitation works and where speed of construction and early completion is required due to limitations of time, space or other reasons
9 Hydrophobic Portland Cement It is manufactured under special requirement for high rainfall areas to improve the shelf life of cement. The cement particles are given a chemical coating during manufacturing, which provides water-repelling property, and the cement is not affected due to high humidity and can be stored for longer period. Due to abundant availability of cement in all parts of the country, this cement is very rarely produced these days.
10 White Cement White Portland Cement is made from raw materials containing very little iron oxide and manganese oxide. Burning in the kiln is done with furnace oil or gas instead of coal. Limited quantities of certain chemicals, which improve whiteness of cement, are added during manufacturing. This type of cement is generally meant for non-structural works. It is used for architectural purposes such as mosaic tiles, wall paintings, GRC and special effects.
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