TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

PERLITE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2016-09-21

English

Subject field(s)
  • Mineralogy
DEF

[A] colorless, grayish, bluish, greenish, reddish, or brownish volcanic glass having the composition of rhyolite and generally a higher water content (less than 4%) than obsidian [and] often showing numerous concentric cracks showing onionlike partings and imparting a pearly luster ...

CONT

Perlite ... can be expanded to many times its original volume by crushing and heating under pressure. Release of the pressure causes expansion when the water in the rock turns to steam.

French

Domaine(s)
  • Minéralogie
DEF

Rhyolite vitreuse riche en eau, à texture perlitique.

CONT

[...] les perlites sont des roches volcaniques riches en eau qui, une fois chauffées, gonflent et deviennent légères et isolantes.

Spanish

Campo(s) temático(s)
  • Mineralogía
Save record 1

Record 2 2016-08-08

English

Subject field(s)
  • Natural Construction Materials
  • Concrete Preparation and Mixing
  • Thermal Insulation
DEF

[A] lightweight granular material used for insulation purposes, manufactured from naturally occurring volcanic rock, expanded by heat to form a cellular structure.

OBS

It is sometimes used in cement to increase the yield of the cement without changing its properties.

OBS

expanded perlite; perlite: terms and definition standardized by ISO.

French

Domaine(s)
  • Matériaux de construction naturels
  • Fabrication du béton
  • Isolation thermique
DEF

Matériau granulaire léger utilisé en isolation, obtenu par expansion à chaud d'une roche volcanique naturelle pour former une structure cellulaire.

OBS

perlite expansée; perlite : termes et définition normalisés par l'ISO.

Spanish

Save record 2

Record 3 2003-04-29

English

Subject field(s)
  • Raw Materials (Iron and Steel)
  • Ferrous Alloys
DEF

Lamellar aggregate of ferrite and cementite in the microstructure of cast iron and steel. (Gould, Dudley C., Metalcasting Dictionary, Illinois, American Foundrymen's Society, Inc., 1977, p. 128)

CONT

When a polished and etched sample of iron is viewed at low magnification, it can have a mother-of-pearl like appearance. This description has been contracted into the term, pearlite, as the name for the common constituent in iron and steel that has this appearance.(Gary and Ductile, Iron Castings Handbook, Cleveland, Iron Founder's Society, Inc., 1971, p. 102)

French

Domaine(s)
  • Matières premières (Sidérurgie)
  • Alliages ferreux
DEF

Constituant micrographique des alliages fer-carbone, résolu à grossissement élevé sous forme de lamelles alternées et parallèles plus ou moins fines de ferrite sombre et de cémentite claire.

CONT

La perlite [...] qui est une succession de couches très minces de ferrite et de cémentite; elle contient 0.87% de carbone et c'est l'eutectique fer-carbone.

Spanish

Campo(s) temático(s)
  • Materias primas (Siderurgia)
  • Ferroaleaciones
Save record 3

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