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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]
Combinations of economic and technical aspects and, increasingly, environmental concerns have made so-called blended cements, i.e., cements that contain considerable amounts of supplementary cementitious materials (mostly around 20% by weight, but over 80% by weight in Portland blast-furnace slag cement), the most widely produced and used ...
"Ghacem" is same as "Ghana Cement", and does not have 97% market share anymore because Buipe plant has been built, and is not really a subsidiary of Scancem, because Scancem is owned by Heidelberg Cement, and has two plants in Ghana : one in Tema, which was upgraded in November 2012 from 1.2 million tons per year to 2.2 Mton/year, and one in ...
A Form 10-K is an annual report required by the U.S. Securities and Exchange Commission (SEC), that gives a comprehensive summary of a company's financial performance. . Although similarly named, the annual report on Form 10-K is distinct from the often glossy "annual report to shareholders", which a company must send to its shareholders when it holds an annual meeting to elect directors ...
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).
In the United States, a more-detailed version of the report, called a Form 10-K, is submitted to the U.S. Securities and Exchange Commission. [2] A publicly held company may also issue a much more limited version of an annual report, which is known as a "wrap report." A wrap report is a Form 10-K with an annual report cover wrapped around it. [3]
Transitional annual report filed on Form NSAR NSAR-BT/A NSAR-U Annual report for unit investment trusts NSAR-U/A Annual report for unit investment trusts (Amendment) NT 10-K Notice under Rule 12b25 of inability to timely file all or part of a Form 10-K, 10-KSB, or 10KT NT 10-K/A Notice under Rule 12b25 of inability to timely file all or part of ...
The high silica composition of Roman pozzolana cements is very close to that of modern cement to which blast furnace slag, fly ash, or silica fume have been added. The strength and longevity of Roman 'marine' concrete is understood to benefit from a reaction of seawater with a mixture of volcanic ash and quicklime to create a rare crystal ...