20/08/2017
Types of Cement, their Composition and Uses.
There are various types of cement used in construction works for various purposes. Thus, it is important to understand properties of each types of cement and their uses. The following are the types of cement that are in practice.
Rapid Hardening Cement: It contains increased Lime content. Attains high strength in early days it is used in concrete where form work are removed at an early stage.
Quick setting cement: It contains small percentage of aluminium sulphate as an accelerator and reducing percentage of Gypsum with fine grinding. Used in works are to be completed in very short period and concreting in static and running water.
Low Heat Cement: It is manufactured by reducing tricalcium aluminate. It is used in massive concrete construction like gravity dams.
Sulphates resisting cement: It is prepared by maintaining the percentage of tricalcium aluminate below 6% which increases power against sulphates. It is used in construction exposed to severe sulphate action by water and soil in places like canals linings, culverts, retaining walls, siphons etc.,
Blast Furnace Slag Cement: It is obtained by grinding the clinkers with about 60% slag and resembles more or less in properties of Portland cement. It can used for works economic considerations is predominant.
High Alumina Cement: It is obtained by melting mixture of bauxite and lime and grinding with the clinker it is rapid hardening cement with initial and final setting time of about 3.5 and 5 hours respectively. It is used in works where concrete is subjected to high temperatures, frost, and acidic action.
White Cement: It is prepared from raw materials free from Iron oxide. It is more costly and is used for architectural purposes such as precast curtain wall and facing panels, terrazzo surface etc.,
Coloured cement: It is produced by mixing mineral pigments with ordinary cement. They are widely used for decorative works in floors.
Pozzolanic Cement: It is prepared by grinding pozzolanic clinker with Portland cement. It is used in marine structures, sewage works and for laying concrete under water such as bridges, piers, dams etc.,
Air Entraining Cement: It is produced by adding indigenous air entraining agents such as resins, glues, sodium salts of Sulphates etc during the grinding of clinker. This type of cement is specially suited to improve the workability with smaller water cement ratio and to improve frost resistance of concrete.
Hydrographic cement: It is prepared by mixing water repelling chemicals. This cement has high workability and strength. For more info visit us at http://pangeagroup.co.in/bizFloat/599944264cbf110a54750b7a/Types-of-Cement-their-Composition-and-Uses-There-are-various-types-of-cement-used-in-construction-works-for-various-purposes-Thus-it-is-important-to-understand-properties-of-each-types-of-cement-and-their-uses-T
