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Electron microprobe analysis of portland cement clinkers

โœ Scribed by A. Ghose; P. Barnes


Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
453 KB
Volume
9
Category
Article
ISSN
0008-8846

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๐Ÿ“œ SIMILAR VOLUMES


Mechanism of glass formation in portland
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In the system C3A-C~AF-SiO2-MgO, the glass formation region that is closely similar in composition to the interstitial material of portland cement clinker has been determined. The interstitial melt that exists in equilibrium with the silicates at the clinkering temperature contains a little silica.

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Unequivocal phase identification of alite in portland cement clinker has been made by combined use of microscopy during heating, X-ray powder diffraction, and differential thermal analysis. Alite thus far assigned to Mlb by X-ray powder diffractometry, in reality, gives every indication of being M

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Crystallization of a liquid similar to that present in Portland cement at clinkering temperatures has been studied. Its composition (in wt %) is CaO = 54.8, A~203 = 22.7, Fez03 = 16.5, Si02 = 6.0. Prolonged crystallization or slow cooling yields the equilibrium phases: C3A, ferrite close to C,AF, an

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In the examination of alite in Portland cement clinker by transmission electron microscopy, the dominant structure found was that described by Jeffery (I). Twinning on the pseudomirror plane of the monoclinic structure has been found. This provides an explanation for some weak extra X-ray reflection