Mineralogy and Chemistry of Cements

H. Pollmann, Mineralogy and crystal chemistry of calcium aluminate cement, in Calcium and Calcium Aluminate Cements, R.J. Mangabhai and F.P. Glasser, (eds.), London, IOM Communications (2001). 

The individual phases discirssed in the text are designated either by their chemical or mineralogical names or by their chemical formulas. Both conventional chemical formirlas and abbreviated chemical symbols and formulas commonly used in cemerrt chemistry are used (see also Table 1.1). The names of the phases most common in inorganic cements are listed in an appendix. 

The two Rosendale cements cannot be directly compared to Roman cements and Prompt due to their different chemistry resulting from high contents of magnesium oxide—peiiclase— and quartz. It can be observed that the periclase content of the cements is similar for both oxide and mineralogy (Tables 1 and 2, respectively) suggesting that its recombination into new minerals is minimal at best. No maximum at 12.19° 26 characteristic of brownmillerite was observed however, small amounts of the phase cannot be excluded as its strongest reflection overlaps with the maxima of the two modifications of belite. 

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