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  • Portland cement - Encyclopedia Britannica

    Portland cement, binding material in the form of a finely ground powder, usually gray, that is manufactured by burning and grinding a mixture of limestone and clay or limestone and shale.The inventor Joseph Aspdin, of England, patented the basic process in 1824, naming it for the resemblance of the cement when set to portland stone, a limestone from the Isle of Portland.

  • Cement - Wikipedia

    Portland blast-furnace slag cement, or Blast furnace cement (ASTM C595 and EN 197-1 nomenclature respectively), contains up to 95% ground granulated blast furnace slag, with the rest Portland clinker and a little gypsum. All compositions produce high ultimate strength, but as slag content is increased, early strength is reduced, while sulfate resistance increases and heat evolution diminishes ...

  • Portland limestone - Simple English Wikipedia, the free ...

    Portland limestone is a limestone which was deposited in the latest stage of the Upper Jurassic period. It was first found on the Isle of Portland, Dorset. However, it occurs over a much wider area, including France. The strata are beds of white-grey limestone separated by beds of chert. Formation Origin. Portland limestone was formed in a shallow, warm, sub-tropical sea on the continental ...

  • Cement - The major cements: composition and properties ...

    Cement - Cement - The major cements: composition and properties: Portland cement is made up of four main compounds: tricalcium silicate (3CaO SiO2), dicalcium silicate (2CaO SiO2), tricalcium aluminate (3CaO Al2O3), and a tetra-calcium aluminoferrite (4CaO Al2O3Fe2O3). In an abbreviated notation differing from the normal atomic symbols, these compounds are designated as C3S, C2S ...

  • Cement - Encyclopedia Britannica Britannica

    Portland cement also is used in the manufacture of bricks, tiles, shingles, pipes, beams, railroad ties, and various extruded products. The products are prefabricated in factories and supplied ready for installation. Because concrete is the most widely used of all construction materials in the world today, the manufacture of cement is widespread. Each year almost one ton of concrete is poured ...

  • Portland, New Zealand - Wikipedia

    Portland is a locality on the western side of Whangarei Harbour in Northland, New Zealand. Whangarei is about 10 km to the north. Tikorangi is a hill to the west with a summit 161 m above sea level. According to the 2018 New Zealand census, Otaika and Portland have a population of 1,338, an increase of 192 people since the 2013 census.. The major industry is Portland Cement, which is New ...

  • District: Whangarei District
  • Cement - Strength - Encyclopedia Britannica

    Cement - Cement - Strength: The tests that measure the rate at which a cement develops strength are usually made on a mortar commonly composed of one part cement to three parts sand, by weight, mixed with a defined quantity of water. Tensile tests on briquettes, shaped like a figure eight thickened at the centre, were formerly used but have been replaced or supplemented by compressive tests on ...

  • Cement - History of cement - Encyclopedia Britannica

    Cement - Cement - History of cement: The origin of hydraulic cements goes back to ancient Greece and Rome. The materials used were lime and a volcanic ash that slowly reacted with it in the presence of water to form a hard mass. This formed the cementing material of the Roman mortars and concretes of 2,000 years ago and of subsequent construction work in western Europe.

  • Portland Cement Article about Portland Cement by The ...

    portland cement[′pȯrtlənd si′ment] (materials) A hydraulic cement made of pulverized, calcined argillaceous and calcareous materials; the proper name for ordinary cement. Portland cement Building material made from limestone, gypsum, and shale or clay that, when mixed with water, binds sand and gravel into concrete. Portland cement was invented ...

  • Portland_cement - chemeurope

    Portland cement is the most common type of cement in general usage in many parts of the world, as it is a basic ingredient of concrete, mortar, stucco and most non-specialty grout.It is a fine powder produced by grinding Portland cement clinker (more than 90%), a limited amount of calcium sulfate which controls the set time, and up to 5% minor constituents (as allowed by various standards).

  • Lehigh Portland Cement Company Encyclopedia

    Lehigh Portland Cement Company 7660 Imperial WayAllentown, Pennsylvania 18195U.S.A.(610) 366-4600Fax: (610) 366-4680 Wholly Owned Subsidiary of Heidelberger Zement A.GIncorporated: 1897Employees: 6,000Sales: $1.2 billion (1997 est.)SICs: 3241 Cement, Hydraulic; 3271 Concrete Block Brick; 3272 Concrete Products, Except Block Brick; 3273 Ready-Mixed Concrete Source for

  • Cement - Simple English Wikipedia, the free encyclopedia

    Cement is a material that hardens and sticks to other materials to hold them together. Portland cement is a common kind, and made from quicklime (heated limestone) and clay. Cement is used to make concrete and mortar. Wikimedia Commons has media related to Cement ...

  • Portland - Wikipedia

    Places and establishments Australia. Cape Portland, Tasmania, a cape on the north-eastern tip of Tasmania; Portland, New South Wales, a town with the first Australian cement works; Portland, Victoria, a regional city and port; City of Portland (Victoria), a former local government area (LGA) Canada. Port Lands, Toronto, Ontario (sometimes mistakenly spelled "Portlands"), the eastern part of ...

  • Aalborg Portland - Wikipedia

    Aalborg Portland is a cement-producing company in Denmark. It was established in Aalborg in the 19th century. Portland cement was patented in 1824 by the Englishman Joseph Aspdin. Six decades later the Aalborg businessman Hans Holm and the engineer Frederick Læssøe Smidth built a cement factory 4 kilometres (2.5 mi) northeast of Aalborg in the town of Rørdal.

  • Cement Encyclopedia

    Cement made at Rosendale, New York, was the most famous, but that made at Coplay, Pennsylvania, the most significant, because it became the first American Portland cement. Portland cement, made by burning and pulverizing briquets of an artificial mixture of limestone (chalk) and clay, was so named because the hardened cement resembled a well-known building stone from the Isle of Portland. Soon ...

  • Modified portland cement Article about modified

    Applying the Bingham rheological model for the obtained flow curves of the modified Portland cement pastes (Figure 3), an exponential relationship was found between the different dosage of the plasticising admixtures and the paste yield stress [[tau].sub.0] (Figure 4a) as well as the plastic viscosity [[mu].sub.pl].

  • Portland Cement - an overview ScienceDirect Topics

    P.W. Hurley, R.G. Pritchard, in Encyclopedia of Analytical Science (Second Edition), 2005. Production of Cement . Portland cement is a complex mixture of compounds formed from the oxides of calcium (CaO), silicon (SiO 2), aluminium (Al 2 O 3), and iron (Fe 2 O 3). In addition to these four main constituents, it also contains smaller amounts of magnesium oxide (MgO) and oxides of the alkali ...

  • Concrete Encyclopedia

    Concrete made with Portland cement is considered superior to that made with natural cement because it is stronger, more durable, and of more consistent quality. According to the American Society of Testing of Materials (ASTM), Portland cement is made by mixing calcareous (consisting mostly of calcium carbonate ) material such as limestone with silica-, alumina-, and iron oxide-containing ...

  • Zement CEM I 32,5R 25 kg bei HORNBACH kaufen

    Zement: Material: Portland Zement: Inhalt: 25 kg: Festigkeitsklasse: 32,5 R: Verarbeitungshinweise und Eigenschaften: Bitte entnehmen Sie dies aus den angehängten Datenblättern. Anwendungsgebiete: Beton: Hinweis: Artikel ist nur Palettenweise erhältlich. Artikelkurznummer (AKN) info Bei der Artikelkurznummer (AKN) handelt es sich um eine HORNBACH-interne Nummer. Diese 4-stellige

  • * Portland cement (Home) - Definition,meaning - Online ...

    portland cement types of portland cement Manufacturers, Retailers, Dealers - Advertise on this page! ... [] Portland Cement-Based Underlayment Filler Vinyl flooring is frequently installed over an existing floor.This is particularly true if the existing floor contains asbestos fibers, which make it dangerous to remove.. A special synthetic blend of limestone and clay used to make concrete ...

  • Alsen (Zementhersteller) – Wikipedia

    Unternehmen. Gegründet wurde das Unternehmen Ende 1863 von Gustav Alsen. Nach der Übernahme von Konkurrenten und deren Werken in Lägerdorf, Uetersen und Hemmoor fusionierte die „Alsen'sche Portland-Cement-Fabriken KG“ 1972 mit der „Breitenburger Portland-Cement-Fabrik AG“ zur „Alsen-Breitenburg Zement- und Kalkwerke GmbH“, die dann 1997 mit der „Nordcement AG“ zur „Alsen ...

  • Portland cement clinker Article about portland cement ...

    Montreal-based McInnis Cement began portland cement clinker production and finishing at its eastern Quebec mill last month, triggering what will likely be a two-year ramp up to annual capacity exceeding 2 million metric tons (mt)--much delivered to concrete producers

  • Was ist Portlandzement? Ursprung, Verwendung,

    Zu den wichtigsten Bestandteilen von Zement gehört neben Kalkstein auch Ton. Wobei: Eigentlich gilt das erst seit dem 19. Jahrhundert, seit der Erfindung des so genannten Portlandzements. Damit begann das moderne Zement- und Betonzeitalter. Über die Geschichte und heutige Bedeutung von Portlandzement informiert der folgende Beitrag. Das Bindemittel Zement ist als Bestandteil von Beton ...

  • Portland cement paint Article about portland cement ...

    1.A paint consisting generally of white portland cement and water, pigments, hydrated lime, water repellents, or hygroscopic salts; usually applied over masonry surfaces as a waterproofing.

  • Portland Cement Association - WikiMili, The Free

    Portland Cement Association is a non-profit organization that promotes the use of concrete.The organization conducts and sponsors concrete research projects, [3] participates in the setting of industry standards of cement manufacturing, [4] [5] disseminates free designs of concrete-based architectural structures and its elements, [6] etc.

  • Portland cement concrete Article about portland

    A composite stonelike material formed by mixing an aggregate (such as stones of irregular shape or crushed rock) with cement (which acts as the binding material) and water, then allowing the mixture to dry and harden; portland cement, now used in making concrete, was not developed until the 19th century.Also see average concrete, cyclopean concrete, poured concrete, reinforced concrete.

  • Cement - New World Encyclopedia

    From New World Encyclopedia. Jump to:navigation, search. Previous (Celts) Next (Cemetery) This concrete transport truck is built to mix cement with an aggregate (such as sand or gravel) and water, to produce concrete. Cement, in the most general sense of the word, is a binder, a substance that sets and hardens independently, and can bind other materials together. The name "cement" goes back to ...

  • Portland Maine Encyclopedia of the 1960s, 70s, 80s ...

    Portland Maine Encyclopedia of the 1960s, 70s, 80s has 15,182 members

  • Portland limestone - Simple English Wikipedia, the free ...

    In a cement Edit. In 1824 Joseph Aspdin invented a cement by burning a mixture of limestone and clay. The limestone he used was Portland linestone, and so he patented the term Portland Cement. Builders quickly recognised that it was better than older cements, although more expensive. It is still widely used in the building trade today.

  • Universal-Zement 25 kg ǀ toom Baumarkt

    Dieser Universal-Zement eignet sich für diverse Anwendungen im Heimwerker- und Profibereich. Es handelt sich um trockenen Zement, welcher mit Wasser angemischt wird. Er ist in einem Lieferumfang von 25 kg erhältlich. Signalwort: Gefahr. Gefahrenhinweise H315 Verursacht Hautreizungen., H318 Verursacht schwere Augenschäden., H335 Kann die Atemwege reizen. Sicherheitshinweise P280 ...

  • White_Portland_cement - chemeurope

    White Portland cement is also used in combination with inorganic pigments to produce brightly colored concretes and mortars. Ordinary cement, when used with pigments, produces colors that may be attractive, but are somewhat dull. With white cement, bright reds, yellows and greens can be readily produced. Blue concrete can also be made, at some expense. The pigments may be added at the

  • Portland limestone - Simple English Wikipedia, the free ...

    In a cement Edit. In 1824 Joseph Aspdin invented a cement by burning a mixture of limestone and clay. The limestone he used was Portland linestone, and so he patented the term Portland Cement. Builders quickly recognised that it was better than older cements, although more expensive. It is still widely used in the building trade today.

  • Giant Cement Holding, Inc. Encyclopedia

    Giant Cement Holding, Inc. is a holding company that manufactures portland and masonry cements. It was the 15th largest U.S. cement producer in 1996. The company also was mining, crushing, screening, and selling stones and gravel, known as aggregates, to the construction industry and marketing cement kiln dust, plus a customized blend of this dust and cement under the name

  • Cement - New World Encyclopedia

    From New World Encyclopedia. Jump to:navigation, search. Previous (Celts) Next (Cemetery) This concrete transport truck is built to mix cement with an aggregate (such as sand or gravel) and water, to produce concrete. Cement, in the most general sense of the word, is a binder, a substance that sets and hardens independently, and can bind other materials together. The name "cement" goes back to ...

  • Cement Kiln Wikipedia The Free Encyclopedia

    Cement wikipedia the free encyclopedia rhinoart cement wikipedia cement is a binder, a substance used in construction that sets, hardens and adheres to other from wikipedia, the free encyclopedia mineral in portland cement are formed without the formation of excessive amounts of free limeement making process miningbmwmement wikipedia.

  • Tolhurst V. Associated Portland Cement Manufacturers,

    This entry about Tolhurst V. Associated Portland Cement Manufacturers, Ltd. has been published under the terms of the Creative Commons Attribution 3.0 (CC BY 3.0) licence, which permits unrestricted use and reproduction, provided the author or authors of the Tolhurst V. Associated Portland Cement Manufacturers, Ltd. entry and the Encyclopedia of Law are in each case credited as the source of ...

  • Portland cement works – Northland region – Te Ara ...

    Portland cement works at Whāngārei has a specialised loading port. Several port facilities on Whāngārei Harbour deal with a variety of cargoes.

  • Portland cement - Academic Kids

    Portland cement is the most common type of cement in general usage, as it is a basic ingredient of concrete and mortar.It consists of a mixture of oxides of calcium, silicon and aluminum.Portland cement and similar materials are made by heating limestone (as source of calcium) with clay or sand (as source of silicon) and grinding the product. The resulting powder, when mixed with water, will ...

  • Cement - Encyclopedia

    Cement - Encyclopedia GEOGRAPHICAL NAMES CEMENT (from Lat. caementum, rough pieces of stone, a shortened form of caedimentum, from caedere, to cut), apparently first used of a mixture of broken stone, tiles, c., with some binding material, and hence of any material capable of adhering to, and uniting into a coherent mass, fragments of a substance not in itself adhesive.

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    The materials of processing: *

    • Granite
    • Limestone
    • Basalt
    • Pebble
    • Gravel
    • Gypsum
    • Marble
    • Barite
    • Quartz
    • Dolomite
    • Gold Ore
    • Copper ore
    * *

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