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The development of modern portland cement (sometimes called ordinary or normal portland cement) began in 1756, when John Smeaton experimented with combinations of different limestones and additives, including trass and pozzolanas, intended for the construction of a lighthouse, [3] now known as Smeaton's Tower.
Twiga Cement is large cement manufacturer, that manufactures three brands of portland cement; (a) Twiga Ordinary (b) Twiga Plus+ and (c) Twiga Extra.In 2014, the factory expanded and increased its manufacturing capacity to 1,900,000 tonnes (2,094,391 tons) annually.
In 2013, 70.8 percent of portland cement was sold as ready-mix concrete, such as is delivered in cement-mixer trucks. 11.5 percent was sold dry to contractors and construction materials stores; 11.3 percent was sold to manufacturers of concrete products; 4.6 percent was sold for oil and gas wells, and 1.8 percent was sold to government agencies ...
(A) Cement; 1. Specification for 33,43,53 Grade ordinary Portland cement IS 269 - 2015 2. Specification for Rapid hardening Portland cement IS 8041 - 1990 3. Specification for Portland Pozzolona cement IS 1489 (part 1&2) 1991 4. Methods of physical test for hydraulic cement IS 4031 - 1988 5. Method of chemical analysis of hydraulic cement IS ...
It requires a much lower content in colored impurities in the raw materials (essentially limestone and clay) used to produce clinker: low levels of Cr 2 O 3, Mn 2 O 3, and Fe 2 O 3), but above all, a higher temperature is needed for the final sintering step in the cement kiln (1600 to 1700 °C in place of 1450 °C for ordinary Portland cement ...
The resulting hard substance, called 'clinker', is then ground with a small amount of gypsum (CaSO 4 ·2H 2 O) into a powder to make ordinary Portland cement, the most commonly used type of cement (often referred to as OPC). Portland cement is a basic ingredient of concrete, mortar, and most non-specialty grout. The most common use for Portland ...
Its products include Ordinary Portland Cement (OPC), which is a product under the Falcon Brand used in all types of general construction. OPC can be used in concretes, mortars, grouts and premix concrete. The company's Falcon Block Cement (FBC) product is offered for block and precast slab makers. [3]
Geopolymer cement is an alternative to ordinary Portland cement and is used to produce Geopolymer concrete by adding regular aggregates to a geopolymer cement slurry. It is made from inorganic aluminosilicate (Al-Si) polymer compounds that can utilise recycled industrial waste (e.g. fly ash , blast furnace slag ) as the manufacturing inputs ...