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Tetracalcium aluminoferrite 1.25

Tetracalcium aluminoferrite acts as a processing aid by reducing the clinkering temperature. It hydrates rapidly but does Htde for any performance property of the cured concrete. It does, however, cause most of the color effects in the cured concrete. [Pg.323]

Tetracalcium aluminoferrite (4CaO Al O, FeOj) has little effect on the physical properties of the cement. For high-sulfate-resistant (HSR) cements, API specifications require that the sum of the tetracalcium aluminoferrite content plus twice the tricalcium aluminate may not exceed a maximum of 24%. [Pg.1179]

Tricalcium silicate 3CaO x Si02 Dicalcium silicate 2CaO x Si02 Tetracalcium aluminoferrite 4CaO X AI2O3 X Fe203... [Pg.127]

Ferrite (dicalcium ferrite), phase in Portland cement clinker, 5 472t Ferrite (tetracalcium aluminate), phase in Portland cement clinker, 5 472t Ferrite (tetracalcium aluminoferrite), phase in Portland cement clinker, 5 472t... [Pg.352]

Tetracalcium aluminoferrite, C4AF, reduces the heat necessary in manufacture. [Pg.69]

Dicalcium silicate Tricalcium silicate Tetracalcium aluminate Tetracalcium aluminoferrite Magnesium oxide... [Pg.133]

The percentage of dicalcium silicate determines the final strength of the cement, whereas the amount of tricalcium silicate is related to the early strength (7 to 8 days) required of the cement. Tricalcium aluminate relates to the set in the cement, and tetracalcium aluminoferrite reduces the heat necessary in manufacture. [Pg.133]

Figure 2.54. Cross-section representation of a powdered cement particle. Dicalcium silicate (Ca2Si04), tricalcium silicate (Ca3Si05), tricalcium aluminate (Ca3Al20g), and tetracalcium aluminoferrite (Ca4Al Fe(2-n)07) crystallites are abbreviated as C2S, C3S, C3A, and C4AF, respectively. Reproduced with permission from Chem. Mater. 2003, 15,3074. Copyright 2003 American Chemical Society. Figure 2.54. Cross-section representation of a powdered cement particle. Dicalcium silicate (Ca2Si04), tricalcium silicate (Ca3Si05), tricalcium aluminate (Ca3Al20g), and tetracalcium aluminoferrite (Ca4Al Fe(2-n)07) crystallites are abbreviated as C2S, C3S, C3A, and C4AF, respectively. Reproduced with permission from Chem. Mater. 2003, 15,3074. Copyright 2003 American Chemical Society.
Figure 16. A polymineral cement grain. Beside gypsum, which is added during grinding of the clinker, cement is constituted of four main components tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminate (C A), and tetracalcium aluminoferrite (C4AF). (Reproduced with permission from reference 1. Copyright 1984 Dowell Schlumberger.)... Figure 16. A polymineral cement grain. Beside gypsum, which is added during grinding of the clinker, cement is constituted of four main components tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminate (C A), and tetracalcium aluminoferrite (C4AF). (Reproduced with permission from reference 1. Copyright 1984 Dowell Schlumberger.)...
Tetracalcium aluminoferrite (C4AF) plus twice the tricalcium aluminate (C3A), maximum, percent NA 24c 24c 24b 24fc 24b... [Pg.630]

More properly tetracalcium aluminoferrite. This must be differentiated from ferrites, which are spinels of general formula AFe O, and from the hexagonal ferrites, that adopt structures related to that of magnetophimbite, E Fej O,. ... [Pg.58]

In 1936 Insley (about whom much more is said later) clearly showed that (1) alite is tricalcium silicate (CjS), (2) two different habits of dicalcium silicate (C S) comprise belite and felite, and (3) celite is tetracalcium aluminoferrite (C AF). Insley s descriptions and illus trations of clinker phases remain the basis for much of succeeding publications by others. [Pg.4]

Tetracalcium aluminoferrite [Ca Al FejOj = C AF] has no significant hydraulic properties and owing to its iron oxide content provide the gray color to cement. [Pg.972]

Tetracalcium aluminoferrite unamed fCaO.AljOj.FCjO, = Ca,Al2Fe,0 C,AF... [Pg.972]

Test Cone. A test-piece cut or moulded from a sample of refractory material that is to be tested for refractoriness or P.C.E. (q.v.). The shape is that of a pyramid on a triangular base the dimensions vary according to which national specification is being followed. Tetracalcium Aluminoferrite. See brownmillerite. [Pg.323]

Collepardi, M., Manosi, M., and Moriconi, G., Combined Effect of Lignosulfonate and Carbonate on Pure Portland Cement Clinker Compound Hydration, I Tetracalcium Aluminoferrite Hydrate, Cement Concr. Res., 10 455-462 (1980)... [Pg.257]

The rate of hydration of C4AF is retarded in the presence of superplasticizers.In an investigation involving conduction calorimetry, Gagne found that, in the presence of SNF and SNF + SO/", the hydration of tetracalcium aluminoferrite was retarded during the 60 minutes of hydration. [Pg.265]

Tetracalcium aluminoferrite 4CaO AI2O3 Fe20s C4AF 9 %... [Pg.44]

Tetracalcium aluminoferrite 4CaO AI2O3 Fe203 C4AF 9%... [Pg.147]

See other pages where Tetracalcium aluminoferrite 1.25 is mentioned: [Pg.970]    [Pg.323]    [Pg.284]    [Pg.931]    [Pg.68]    [Pg.529]    [Pg.445]    [Pg.323]    [Pg.408]    [Pg.189]    [Pg.215]    [Pg.317]    [Pg.583]    [Pg.199]    [Pg.272]    [Pg.345]    [Pg.614]    [Pg.102]    [Pg.107]    [Pg.225]    [Pg.225]   
See also in sourсe #XX -- [ Pg.127 ]

See also in sourсe #XX -- [ Pg.972 ]

See also in sourсe #XX -- [ Pg.225 ]

See also in sourсe #XX -- [ Pg.25 ]



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