Stability of ternesite and the production at scale of ternesite-based clinkers

Theodore Hanein, Isabel Galan, Fredrik P. Glasser, Solon Skalamprinos, Ammar Elhoweris, Mohammed S. Imbabi, Marcus N. Bannerman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)
9 Downloads (Pure)

Abstract

A method to synthesize high-purity ternesite at gram scale is presented and a brief description of the product morphology and reactivity is presented. Thermodynamic data for ternesite are derived from vapour pressure measurements and the limits of ternesite stability are explored. An upper temperature stability limit of ≈1290°C at 1 atm is determined; however, this temperature is dependent on the fugacity of the volatile components SO2 and O2 in the kiln atmosphere. Both thermodynamic predictions and lab experiments confirm that Calcium SulfoAluminate-Ternesite clinkers can be readily produced in a single stage process provided the atmosphere and temperature are controlled. To demonstrate this control at larger scales, a conventional 7.4-meter rotary kiln has been used to produce ≈20 kilograms of ternesite-containing clinkers. This demonstrates the usefulness of thermodynamic modelling as it has enabled ternesite based clinkers to be produced at scale in a single-stage process using existing equipment without major modifications.
Original languageEnglish
Pages (from-to)91-100
Number of pages10
JournalCement and Concrete Research
Volume98
Early online date28 Apr 2017
DOIs
Publication statusPublished - 1 Aug 2017

Bibliographical note

The authors gratefully acknowledge the financial support provided by the Gulf Organization for Research and Development (GORD), Qatar through research grant number ENG016RGG11757. The authors would also like to acknowledge Dr. Gabriel Jen for carrying out the sieve analysis presented in this work. The continuous support prior to, during, and after the pilot kiln trials from Vadym Kuznietsov and the entire team at IBU-tec is also greatly appreciated.

Keywords

  • Cement Manufacture (E)
  • Sulfoaluminate (D)
  • Thermodynamic Calculations (B)
  • Ternesite

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