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  2. Portland cement - Wikipedia

    en.wikipedia.org/wiki/Portland_cement

    Bags of portland cement wrapped and stacked on a pallet. Blue Circle Southern Cement works near Berrima, New South Wales, Australia.. Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout.

  3. Pozzolan - Wikipedia

    en.wikipedia.org/wiki/Pozzolan

    A reduction of 40 percent of Portland cement in the concrete mix is usually feasible when replaced with a combination of pozzolanic materials. Pozzolans can be used to control setting, increase durability, reduce cost and reduce pollution without significantly reducing the final compressive strength or other performance characteristics.

  4. Pozzolana - Wikipedia

    en.wikipedia.org/wiki/Pozzolana

    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).

  5. Energetically modified cement - Wikipedia

    en.wikipedia.org/wiki/Energetically_modified_cement

    The first cited claims for EMC's CO 2-reduction capabilities were made in 1999, when worldwide Portland cement production stood at 1.6 billion tonnes per year. [ 23 ] [ 28 ] From 2011 to 2019, worldwide Portland cement production increased from 3.6 to 4.1 billion tonnes per year. [ 29 ] [

  6. Cement - Wikipedia

    en.wikipedia.org/wiki/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 ...

  7. Cement Corporation of India - Wikipedia

    en.wikipedia.org/wiki/Cement_Corporation_of_India

    Cement Corporation of India Limited (CCI) is the only cement manufacturing Public Sector Undertaking of Government of India.The company was incorporated as a wholly government-owned corporation on 18 January 1965, with the objective of setting up cement units in public sector to help achieve self-sufficiency in cement production in the country.

  8. Roman concrete - Wikipedia

    en.wikipedia.org/wiki/Roman_concrete

    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 ...

  9. Blue Circle Industries - Wikipedia

    en.wikipedia.org/wiki/Blue_Circle_Industries

    Blue Circle Industries was a British public company manufacturing cement. [1] It was founded in 1900 as the Associated Portland Cement Manufacturers Ltd. through the fusion of 24 cement works, mostly around on the Thames and Medway estuaries, together having around a 70% market share of the British cement market.

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