The conversion process of quartz grains into belite clusters in portland cement clinker has been followed under isothermal heating conditions at 1400Β°C. On heating, quartz grains are surrounded by layers consisting of belite and liquid, which continue to grow thick with the progress of conversion (o
An Unusual Form of Belite in Portland Cement Clinker
β Scribed by A. Ghose; P. Barnes
- Book ID
- 110820133
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 482 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0002-7820
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π SIMILAR VOLUMES
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.
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
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