Impurity Distribution During Crystal Growth of Alite in Portland Cement Clinker
โ Scribed by Iwao Maki; Koichiro Fukuda; Shunichi Seki; Takashi Tanioka
- Book ID
- 110825527
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 480 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0002-7820
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
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
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
The phase constitution of alite in portland cement clinker highly depends not only on the chemical composition of a raw mix but also on the kinetics of crystallization from the interstitial melt. From the melt of high supersaturation alite can be crystallized so quickly as to take up foreign ions i
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