Portland cement

<rdf:RDF>

1. <skos:Concept rdf:about="http://vocab.getty.edu/aat/300010377">

   1. <skos:prefLabel xml:lang="en">portland cement</skos:prefLabel>

   2. <skos:prefLabel xml:lang="nl">portlandcement</skos:prefLabel>

   3. <skos:prefLabel xml:lang="es">cemento Portland</skos:prefLabel>

   4. <skos:altLabel xml:lang="en">cement, portland</skos:altLabel>

   5. <skos:broader rdf:resource="http://museovirtualfelixcanada.digibis.com//concepts/50201" />

   6. <skos:note xml:lang="en">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 cementitious binder for most structural concrete; obtained by pulverizing clinker consisting essentially of hydraulic calcium silicates; contains calcium sulfate as an interground addition. When mixed with water, the anhydrous calcium silicates and other constituents in the portland cement react chemically with the water, combining with it (hydration) and decomposing in it (hydrolysis) and hardening and developing strength. 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.</skos:note>

   7. <skos:note xml:lang="es">Elemento de mezcla cementosa de la mayoría de los hormigones estructurales; obtenido pulverizando una escoria formada fundamentalmente por silicatos de calcio hidráulicos. Contiene sulfato de calcio como añadido básico.</skos:note>

   8. <skos:note xml:lang="nl">Het cementachtige bindmiddel voor de meeste gestructureerde soorten beton, verkregen door het verpulveren van klinker die hoofdzakelijk bestaat uit hydraulische calciumsilicaten; bevat calciumsulfaat als meegemalen toevoeging.</skos:note>

   9. <skos:notation>300010377</skos:notation>

   10. <skos:inScheme rdf:resource="http://museovirtualfelixcanada.digibis.com//schemas/2" />

   </skos:Concept>

</rdf:RDF>