Hydration products of calcium aluminoferrite in the presence of gypsum

✍ Scribed by Tong Liang; Yang Nanru

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 781 KB
• Volume: 24
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(94)90096-5

✦ Synopsis

Hydration products of C6AzF, C4AF and C6AF 2 in the presence of gypsum were studied by DTA, XRD, EDAX and IR techniques. An iron-rich phase, containing tittle calcimn, was found in their hydrates. DTA proved to bc an effeclivc method to detect this phase if it was enriched. Good linear relationships wcrc obtained between optical densities and Fo/(Fe+AI) ratios in AFm phases when infi, ared absorption bands between 1200-960 cm -I were fitted by Gaussian-line-shal~ era'yes. The correlations suggested that the intensity of the absorption of v3-SO42-could quantify the amount of Fe(]II) in AFm phases. A possible explanation of this rcsuR was tentatively proposed as well.