Calcium sulfoaluminate clinker produced through a previously described novel production process, generating further economies of carbon emission minimization and sulfur use efficiency, is tested for performance as a cementitious binder. The reactivity levels of major phases, including ye’elimite, two polymorphs of belite and anhydrite are found to produce a viable product characterized by rapid hydration. Through investigation, the reactivity is linked to the unique distribution of crystalline phases present within cement grains. It is inferred that both microstructure and mineralogy are responsible for the undesirable set behaviour encountered. The causality of this problem is further investigated and determined to be a consequence of the intrinsic anhydrite component for which remediation solutions are described. The resultant mortar compression strengths are determined for the subject cement in order to characterize its potential in relation to ordinary Portland cement.
|Journal||Materials and Structures/Materiaux et Constructions|
|Early online date||27 Feb 2017|
|Publication status||Published - Apr 2017|
Bibliographical noteGulf Organisation for Research and Development EG016-RG11757
Open access via Springer Compcat Agreement
The authors are grateful for the financial support of the Gulf Organization for Research and Development (GORD) through grant EG016-RG11757. Mr Mathieu Antoni of LafargeHolcim is thanked for his assistance in processing the grinding of the experimental clinker. Mr Theodore Hanein is thanked for insight gained in discussions regarding thermodynamic modelling of the CaO-Al2O3-SO3-SiO2 system within the kiln environment.
- calcium sulfoaluminate
- flash set
- false set