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Calcium aluminoferrite

Portland cement is classified as a hydrauHc cement, ie, it sets or cures in the presence of water. The term Portland comes from its inventor, Joseph Aspdin, who in 1824 obtained a patent for the combination of materials referred to today as Portland cement. He named it after a grayish colored, natural limestone quarried on the Isle of Portland, which his cured mixture resembled. Other types of hydrauHc cements based on calcium materials were known for many centuries before this, going back to Roman times. Portland cement is not an exact composition but rather a range of compositions, which obtain the desired final properties. The compounds that make up Portland cements are calcium siHcates, calcium aluminates, and calcium aluminoferrites (see ). [Pg.322]

Calcium aluminate chloride, phase in Portland cement clinker, 5 472t Calcium aluminate fluoride, phase in Portland cement clinker, 5 472t Calcium aluminoferrite, phase in Portland cement clinker, 5 472t Calcium aluminoferrite hydrate, 5 477t Calcium—aluminum alloys, 4 530 Calcium amalgam, 22 773 Calcium ammonium nitrate, 2 724 Calcium analysis, of water, 26 37 Calcium A zeolite, separation of hydrocarbons by, 16 823 Calcium—barium—silicon alloy, 22 519 Calcium-bearing manganese silicon,... [Pg.132]

A dark brown intermediate substance of irregular and ragged form with a lime-iron-aluminate composition (later shown to be calcium aluminoferrite)... [Pg.1]

A sulfoferrite-bearing clinker may be produced in a rotary kiln at burning temperatures of 1200-1350 °C. Its phase composition may vary—depending on the basicity of the raw meal and its gypsum content—in the following range C FgS, 10-55% CjFS, 0-60% C2S, 25-40% calcium aluminoferrite phase and other constituents, 5-30%. In commercial sulfofenite clinkers the composition of the sulfoferrite phases may vary as follows 3CF.(0.75-1.5)CS and C2F(0.8-1.5)CS. About 5-15% of sulfofenite clinker is combined with ordinary Portland chnker and calcium sulfate to obtain sulfofenite cement. [Pg.248]

Portland cement clinker consists substantially of the four crystalline clinker phases alite, belite, calcium aluminateand calcium aluminoferrite in close interpenetrating association. In addition, the clinker contains voids ("pores") and usually some free (uncombined) lime more rarely, periclase is present. [Pg.74]

In the cooling zone (1450-1300°C), crystallization of melt occurs with the formation of calcium aluminate and calcium aluminoferrite. [Pg.38]

Chen, Y., and Shi, L., Rate of Ettringite Formation from Calcium Aluminoferrite Hydration, Proc. 10 Int Congr. Chem. Cements, p. 8, Gothenbnrg (1997)... [Pg.139]

M. Morioka, K. Nakamura, H. Sango, S. Tanaka, O. Machinaga, and Y. Aoyama, Immobilization Behavior of Cr[ T] According to Hydration of Various Calcium Aluminoferrites. Journal of the... [Pg.59]

The Portland cement used mainly consists of calcium silicates, calcium alumi-nate, and calcium aluminoferrite, the so-called clinker minerals. Further, the cement contains a small amormt of gypsum added dnring grinding. The composition of a typical Portland cement is as follows ... [Pg.177]

When the alumina-ferric oxide ratio is less than 0.64. a calcium aluminoferrite sohd solution (expressed as ss(C AF + C2F)) is formed Contents of this solid solution and of tricalcium silicate shall be calculated by the following formulas ... [Pg.154]

See other pages where Calcium aluminoferrite is mentioned: [Pg.323]    [Pg.284]    [Pg.180]    [Pg.323]    [Pg.2]    [Pg.180]    [Pg.81]    [Pg.82]    [Pg.17]    [Pg.19]    [Pg.93]    [Pg.121]    [Pg.41]    [Pg.75]    [Pg.614]   
See also in sourсe #XX -- [ Pg.37 ]

See also in sourсe #XX -- [ Pg.364 ]



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