Hydration characteristics of calcium sulfoaluminate cements synthesized using an industrial symbiosis framework

Date

2024-10-11

Author

Tanguler-Bayramtan, Meltem
Turk, Serkan
Yaman, İsmail Özgür

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Calcium sulfoaluminate (CSA) cement offers a sustainable alternative to ordinary portland cement by using less energy and producing fewer CO2 emissions. However, the high cost and limited availability of alumina-rich resources like bauxite pose significant challenges for CSA cement production. This study addresses these issues by synthesizing CSA cement through an industrial symbiosis framework, incorporating natural materials (limestone and gypsum) with industrial wastes and by-products (Serox, ladle furnace slag, ceramic waste, and glass waste). This approach aims to minimize these challenges to CSA production while promoting environmental sustainability in the construction industry. Laboratory studies have resulted in the successful synthesis of three distinct CSA cements with at least 40 % recovered material content. Ye'elimite, anhydrite, merwinite, and fluorellestadite were identified as major compounds of the CSA cements. Hydration studies revealed ettringite as the primary hydration product, contributing to rapid strength gains with compressive strengths over 30 MPa within a day. In addition, a tendency to ettringite carbonation was observed over the long term, the adverse effects of which need to be further investigated. These results demonstrate the feasibility of producing environmentally friendly CSA cements through industrial symbiosis and highlight their potential for scalable and sustainable construction applications.

Subject Keywords

Calcium sulfoaluminate cement, Carbonation, Ceramic waste, Ettringite, Glass waste, Hydration, Ladle furnace slag, Serox, Ye'elimite

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85202750023&origin=inward
https://hdl.handle.net/11511/111214

Collections

Department of Civil Engineering, Article