A discussion of the paper “physico-chemical characteristics of cement produced using sulfur bearing fuels in the black meal process for cement manufacture” by P. Barkakati, D. Bordoloi, S. Bandyopadhyay and U.C. Borah

✍ Scribed by William G. Hime; Stella Marusin

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 31 KB
• Volume: 24
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(94)90206-2

✦ Synopsis

The paper discusses cement production in using a vertical kiln. We caution the authors that some recent work by us has shown that high sulfur contents of clinker made in a rotary kiln may lead to delayed ettringite formation (DEF) if the sulfate is not readily soluble. No standard tests of cement, including analytical procedures, optimum gypsum tests or uncombined sulfate determinations, measure "insoluble" sulfate.

It is suggested that water-soluble sulfate (1 gram per 200 ml of water, 10-minute digestion) be compared to total sulfate, and significant differences be viewed with concerned. *Cem. Conc. Res. 23( 5) 1185 (1993).