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The institute in the 1990s begun researching into Pozzolana cement, an alternative cement to the Portland cement for building. [5] Pozzolana cement cost less than Portland cement. In May, 2007, BRRI and PMC Global Incorporated of America signed a contract for the commercial production of Pozzolana. [5]
In February 2024 it was jointly announced that a manufacturing plant for EMCs made from volcanic materials will be jointly developed by "EMC Cement" and HES International at the Port of Amsterdam, and further, that the "all-electric zero-emissions plant, of an initial capacity of 1.2 million tonnes, will cut CO2 emissions by 1 million tonnes ...
For structural mortars, he recommended pozzolana (pulvis puteolanus in Latin), the volcanic sand from the beds of Pozzuoli, which are brownish-yellow-gray in colour in that area around Naples, and reddish-brown near Rome. Vitruvius specifies a ratio of 1 part lime to 3 parts pozzolana for mortar used in buildings and a 1:2 ratio for underwater ...
Pozzolana from Mount Vesuvius volcano, Italy. Pozzolana or pozzuolana (/ ˌ p ɒ t s (w) ə ˈ l ɑː n ə / POT-s(w)ə-LAH-nə, Italian: [potts(w)oˈlaːna]), also known as pozzolanic ash (Latin: pulvis puteolanus), is a natural siliceous or siliceous-aluminous material which reacts with calcium hydroxide in the presence of water at room temperature (cf. pozzolanic reaction).
It started production in 2002 with annual production of 700,000 tonnes of cement and was inaugurated by former President John Kufuor of Ghana in 2004. [1]The company in February 2014, completed a 2.5 km rail siding connecting it to the Togo Railway network, giving access to the port of Lomé, Togo, for easy delivering of clinker for cement production.
Bauchi-Gwana Cement, Alkaeri L.G.A. Bauchi (subsidiary of Cretent Intl) BUA Cement, Obu, Okpella, Edo State Former Edo cement, near Benin City. BUA Cement, Kalambaina Sokoto State. Commissioned July 2018; Cement Company of Northern Nigeria, also known as Sokoto Cement, with 6 offices in northern states [36] Dangote Cement [37]
Mechanical evaluation of the pozzolanic activity is based upon a comparison of the compressive strength of mortar bars containing pozzolans as a partial replacement for Portland cement to reference mortar bars containing only Portland cement as binder. The mortar bars are prepared, cast, cured and tested following a detailed set of prescriptions.
Ghana Cement also known as Ghacem was founded by the Government of Ghana in collaboration with Norcem AS of Norway, on 30 August 1967. [ 1 ] [ 2 ] It is the largest producer of cement in Ghana. Ghacem has since inception produced more than 30 million tons of cement .