| Yazarlar (6) |
Ahmet Benli
Bingöl Üniversitesi, Türkiye |
Doç. Dr. Oğuzhan Yavuz BAYRAKTAR
Kastamonu Üniversitesi, Türkiye |
|
Mehmet Karataş
Türkiye |
|
Burak Bodur
Türkiye |
Dr. Öğr. Üyesi Mehmet Uğur YILMAZOĞLU
Türkiye |
|
Gökhan Kaplan
Türkiye |
| Özet |
| Natural pozzolans are a sustainable alternative to Portland cement, offering abundant alumina and reactive silica for geopolymer production. Due to their simple extraction methods, they are cost-effective and environmentally friendly. This study explores the utilization of dunite powder (DP) as a sustainable precursor in one-part alkali-activated slag-based composites (AAC), aiming to evaluate its potential to partially replace granulated blast furnace slag (GBFS). The mechanical, fresh, and durability properties of the composites were investigated by varying DP replacement levels (0%, 15%, 30%, and 60%) under an activator dosage of sodium metasilicate, with the mixtures cured at 80 °C for 24 h and subsequently exposed to ambient conditions. The compressive and flexural strengths were evaluated at 7, 28, and 91 days, while the fresh properties (flowability and setting time), durability under sulfate attack, high-temperature resistance, freeze-thaw resistance, dry shrinkage, sorptivity and microstructural characteristics (SEM, XRD, and FT-IR) were also examined. The compressive strength decreased with higher DP content, with the 60% DP mixture showing a 43% strength reduction at 28 days compared to the reference mixture. However, the 30% DP mixture achieved a favorable balance between strength and sustainability, demonstrating a compressive strength decrease of only 11% at 91 days. The mixture containing 15% DP demonstrated the best performance under high-temperature conditions and freeze-thaw cycles. The 60% DP mixture exhibited the highest mass and strength loss when exposed to temperatures above 400 °C and a 15% compressive strength reduction after 120 days of immersion in a 10% MgSO4 solution. |
| Anahtar Kelimeler |
| Alkali-activated composites | Dunite powder | Granulated blast furnace slag | Mechanical and durability properties | Sustainable construction |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | Sustainable Chemistry and Pharmacy |
| Dergi ISSN | 2352-5541 Wos Dergi Scopus Dergi |
| Dergi Tarandığı Indeksler | SCI-Expanded |
| Dergi Grubu | Q1 |
| Makale Dili | İngilizce |
| Basım Tarihi | 04-2025 |
| Cilt No | 44 |
| Sayı | 101964 |
| Doi Numarası | 10.1016/j.scp.2025.101964 |
| Makale Linki | https://doi.org/10.1016/j.scp.2025.101964 |
| Atıf Sayıları |
