TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Low in tricalcium aluminate and having a reduced susceptibility to attack by dissolved sulfates in water or soils.  1, record 1, English, - sulfate%20resistant

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

When water is added to cement a chemical process called hydration takes place. Chemicals in the cement chemically react and are transformed into new compounds. [For example, for the combined materials] tetracalcium aluminate + water + calcium hydroxide [corresponds the] transformed compound tetracalcium aluminate hydrate.  4, record 2, English, - dialuminium%20tetracalcium%20heptaoxide%20hydrate

Record number: 2, Textual support number: 2 CONT

Tricalcium aluminate plus 12 parts water and calcium hydroxide is converted to tetracalcium aluminate hydrate(3CaO·Al₂O₃·Ca(OH) ₂·12H₂O).  5, record 2, English, - dialuminium%20tetracalcium%20heptaoxide%20hydrate

Record number: 2, Textual support number: 3 CONT

Anthony et al. studied the activation of unreacted calcium by means of injecting limestone into the furnace. They report hydrated tetracalcium aluminate as the major hydration product of the activation process.  6, record 2, English, - dialuminium%20tetracalcium%20heptaoxide%20hydrate

Record number: 2, Textual support number: 1 OBS

Chemical formula: Ca₄Al₂O₇•nH₂O; the small letter "n" must be italicized.  1, record 2, English, - dialuminium%20tetracalcium%20heptaoxide%20hydrate

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

[Parmi les réactions chimiques observées pendant l'hydratation des ciments figure] l'hydratation des deux phases aluminates qui réagissent avec le gypse (régulateur de prise) pour former de l'ettringite, du monosulfoaluminate tricalcique hydraté et de l'aluminate tétracalcique hydraté.  3, record 2, French, - heptaoxyde%20de%20dialuminium%20et%20de%20t%C3%A9tracalcium%20hydrate

Record number: 2, Textual support number: 1 OBS

Le procédé d'hydratation du clinker, qui redonne des composés cristallins, est complexe: l'aluminate tricalcique se transforme en aluminate tétracalcique et (en présence de gypse) en sulfoaluminates.  4, record 2, French, - heptaoxyde%20de%20dialuminium%20et%20de%20t%C3%A9tracalcium%20hydrate

Record number: 2, Textual support number: 2 OBS

Formule chimique : Ca₄Al₂O₇•nH₂O; la lettre «n» s'écrit en italique.  1, record 2, French, - heptaoxyde%20de%20dialuminium%20et%20de%20t%C3%A9tracalcium%20hydrate

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 OBS

Chemical formula: 3CaO•Al₂O₃  3, record 3, English, - tricalcium%20aluminate

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Constituant des ciments alumineux hydratés, blanc et isométrique.  2, record 3, French, - aluminate%20tricalcique

Record number: 3, Textual support number: 1 OBS

Formule chimique : 3CaO•Al₂O₃  3, record 3, French, - aluminate%20tricalcique

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

SECAR 41 is a hydraulic binder with an alumina content of approximately 47% and an iron oxide content of approximately 5%. [It] is composed mainly of calcium aluminate phases, which makes it an ideal binder for refractory applications. SECAR 41 is particularly rich in monocalcium aluminate ... which imparts excellent properties to mortars and concretes.  3, record 4, English, - monocalcium%20aluminate

Record number: 4, Textual support number: 2 CONT

The most important cement compounds formed on fusion are monocalcium aluminate(CA) and tricalcium pentaluminate(C₃A₅) ;furthermore, some pentacalcium pentaluminate and small amounts of dicalcium aluminosilicate, dicalcium silicate, and tetracalcium aluminoferrite are also present. Both monocalcium aluminate and tricalcium pentaluminate hydrate initially to a gel CaAl₂(OH) ₈·6H₂O, which gradually changes to a very stable, crystalline complex Ca₃Al₂(OH) ₁₀·3H₂O and a gel of aluminium hydroxide Al(OH) ₃.  4, record 4, English, - monocalcium%20aluminate

Record number: 4, Textual support number: 1 PHR

Hydrated monocalcium aluminate.  5, record 4, English, - monocalcium%20aluminate

Record number: 4, Textual support number: 1 OBS

Chemical formula: (CaO·Al₂O₃) or CaAl₂O₄  2, record 4, English, - monocalcium%20aluminate

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Ciments alumineux fondus : notés CA, norme NF P 15-315, ils sont obtenus par fusion, à très haute température, d'un mélange de calcaire et de bauxite ferrugineuse. Pauvres en SiO₂ (4 à 10 %), ils sont par contre riches en Al₂O₃ (40 à 45 %) et sont principalement constitués d'aluminate monocalcique (CaO·Al₂O₃) ou CaAl₂O₄.  3, record 4, French, - aluminate%20monocalcique

Record number: 4, Textual support number: 1 PHR

Aluminate monocalcique hydraté.  4, record 4, French, - aluminate%20monocalcique

Record number: 4, Textual support number: 1 OBS

Formule chimique : (CaO·Al₂O₃) ou CaAl₂O₄  2, record 4, French, - aluminate%20monocalcique

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

Using a novel experimental procedure in the field of ceramics/materials science that is based on the precise microanalysis (scanning electron microscopy, coupled with wavelength-dispersive spectroscopy) of the phases that are present in equilibrated specimens, the solid-state compatibility relations in the subsystem ... were established. ... The temperature, composition, and character of the ternary invariant points of the subsystem were established, and the ranges of the solid solutions in periclase, spinel, monocalcium aluminate, and dicalcium aluminate also were studied and determined, up to 1725°C.  2, record 5, English, - dicalcium%20aluminate

Record number: 5, Textual support number: 2 CONT

When limestones containing silica and clay are burned, the clay decomposes at between 400°C to 600°C and combines at 950°C to 1250°C(the top end of the burning temperatures for hydraulic lime : sintering takes place at 1300°C to 1400°C) with some of the lime, forming silicates and aluminates, especially tricalcium silicate and dicalcium aluminate.  3, record 5, English, - dicalcium%20aluminate

Record number: 5, Textual support number: 1 OBS

Chemical formula: Ca₂Al₂O₅  4, record 5, English, - dicalcium%20aluminate

Record number: 5, Textual support number: 1 PHR

Hydrated dicalcium aluminate.  5, record 5, English, - dicalcium%20aluminate

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

Les composés actifs du ciment sont des silicates tricalciques (3CaO,SiO₂), dicalciques (2CaO,SiO₂), et des aluminates tricalciques (3CaO,Al₂O₃). Instables, ces éléments changent de structure en présence d'eau.  3, record 5, French, - aluminate%20dicalcique

Record number: 5, Textual support number: 2 OBS

Les composés principaux formés dans les scories de ciment Portland et qui confèrent les propriétés de liaisonnement et de résistance, sont les silicates de calcium, 3CaO.SiO₂ et 2CaO.SiO₂. Lorsqu'on les mélange avec l'eau, ces composés anhydres s'hydratent, se prennent, et durcissent lentement en suivant le comportement bien connu du ciment Portland. L'aluminate tricalcique 3CaO.Al₂O₃, qui se trouve dans les scories, forme aussi un hydrate avec l'eau; [...]  4, record 5, French, - aluminate%20dicalcique

Record number: 5, Textual support number: 3 OBS

Formule chimique : Ca₂Al₂O₅  5, record 5, French, - aluminate%20dicalcique

Record number: 5, Textual support number: 1 PHR

Aluminate bicalcique hydraté.  6, record 5, French, - aluminate%20dicalcique

Record 5,  Textual support,  Spanish