Recycling high volume Fe-rich fayalite slag in blended alkali-activated materials: Effect of ladle and blast furnace slags on the fresh and hardened state properties
نویسندگان
چکیده
The valorization of Fe-rich fayalite slag (FS) as a precursor for alkali-activated materials (AAMs) is hampered by its low reactivity at ambient temperature. Here, FS was blended with waste-based reactive co-binders such ladle (LS) and blast furnace (BFS) to improve the fresh hardened state properties AAMs potential construction applications. results showed that incorporation LS BFS an additional source Ca Al accelerated reaction kinetics influenced binder gel type formation mechanism. In all mixes, Fe, Si Na are present in evolving gel. addition these elements, formulations also rich higher quantities possible C-A-S-H C-(N)-A-S-H together development andradite, calcium ferrosilicate hydrate phase formed from chemical interaction between co-binders; it indicates both co-binder participated formation. Furthermore, nucleating filling effects improved workability, ultrasonic pulse velocity mechanical properties; this densified structure lowered water absorption permeable porosity mortars. compressive strength mortars above 20 MPa, thus satisfying requirements building according ASTM C62. study emphasize reuse other waste streams producing eco-friendly AAMs, which can have wide range
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ژورنال
عنوان ژورنال: Journal of building engineering
سال: 2023
ISSN: ['2352-7102']
DOI: https://doi.org/10.1016/j.jobe.2022.105436