Abstract
A method to synthesize high-purity ternesite is presented and the importance of reaction volume is highlighted; a
brief description of the product morphology is also presented. Thermodynamic data for ternesite are derived and
the limits of ternesite stability are then 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 in the
atmosphere. Thermodynamic predictions confirm that belite and ternesite rich calcium sulfoaluminate clinkers
can be readily produced in a single stage process at temperatures above 1200 °C 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 kg of ternesite-containing clinkers. This demonstrates the usefulness of thermodynamic
modelling as it has enabled ternesite-based clinkers to be readily produced at scale in a single-stage
process using existing equipment without major modifications.
brief description of the product morphology is also presented. Thermodynamic data for ternesite are derived and
the limits of ternesite stability are then 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 in the
atmosphere. Thermodynamic predictions confirm that belite and ternesite rich calcium sulfoaluminate clinkers
can be readily produced in a single stage process at temperatures above 1200 °C 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 kg of ternesite-containing clinkers. This demonstrates the usefulness of thermodynamic
modelling as it has enabled ternesite-based clinkers to be readily produced at scale in a single-stage
process using existing equipment without major modifications.
| Original language | English |
|---|---|
| Journal | Cement and Concrete Research |
| Volume | 98 |
| Publication status | Published - 2017 |
| Externally published | Yes |