Adediran, A., Yliniemi, J., Carvelli, V., Adesanya, E., & Illikainen, M. (2022). Durability of alkali-activated Fe-rich fayalite slag-based mortars subjected to different environmental conditions. Cement and Concrete Research, 162, 106984. https://doi.org/10.1016/j.cemconres.2022.106984
Durability of alkali-activated Fe-rich fayalite slag-based mortars subjected to different environmental conditions
|Author:||Adediran, Adeolu1; Yliniemi, Juho1; Carvelli, Valter2;|
1Fibre and Particle Engineering Research Unit, University of Oulu, Pentti Kaiteran katu 1, 90014 Oulu, Finland
2Department A.B.C., Politecnico di Milano, Piazza Leonardo Da Vinci 32, 20133 Milan, Italy
|Online Access:||PDF Full Text (PDF, 5.7 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2022101862311
|Publish Date:|| 2022-10-18
Fe-rich alkali activated materials (AAMs) require detailed understanding of their durability prior to their real-life application in the construction industry. Three mixes were formulated with fayalite slag (FS) as the main precursor. The effect of incorporation of ladle slag (LS) or blast furnace slag (BFS) on the shrinkage and exposure to physical and chemical attacks representing environmental conditions in cold and tropical regions (acidic solution at room temperature and in freeze-thaw, combined sodium sulfate and sodium chloride solution at room temperature and in freeze-thaw, freeze-thaw in water and dry-wet cycles) was investigated via visual observation, mass loss, compressive strength, X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), and scanning electron microscope coupled with energy dispersive X-ray spectroscopy (SEM-EDS). Experimental results show the considerable role of incorporated LS and BFS in modifying the gels formed and controlling material degradation of blended AAMs after exposure. In contrast, sole FS-based samples were completely degraded particularly those exposed to freeze-thaw in water, acid, and combined sodium sulfate and sodium chloride solution, indicating their vulnerability to frost and chemical attacks.
Cement and concrete research
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
215 Chemical engineering
This work was done as a part of the TOCANEM project funded by Business Finland and various companies. Adeolu Adediran has received funding from Walter Ahlström and Auramo-säätiö for his doctoral research. J. Yliniemi acknowledge financial support from the Academy of Finland (grant # 322786). The authors gratefully acknowledge the Centre for Material Analysis, University of Oulu, Finland, for assistance with data analysis. The authors acknowledge Prof Cristina Tedeschi (Politecnico di Milano) for the MIP measurements and discussion.
|Academy of Finland Grant Number:||
322786 (Academy of Finland Funding decision)
© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).