Recycling of waste crushed stone powder for alkali-activated material production
Journal of Material Cycles and Waste Management, cilt.26, sa.4, ss.2413-2434, 2024 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 26 Sayı: 4
- Basım Tarihi: 2024
- Doi Numarası: 10.1007/s10163-024-01973-z
- Dergi Adı: Journal of Material Cycles and Waste Management
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, Agricultural & Environmental Science Database, Compendex, Environment Index, INSPEC, Pollution Abstracts, Civil Engineering Abstracts
- Sayfa Sayıları: ss.2413-2434
- Anahtar Kelimeler: Alkali-activated material, Crushed stone powder, Inactive precursor, Recycling, Slag
- Atatürk Üniversitesi Adresli: Evet
Özet
The growing use of crushed stone and manufactured sand poses a major challenge to the recycling of their by-product known as crushed stone powder (CSP). To establish an effective recycling method for CSP, the authors conducted a detailed investigation on the setting, strength, and durability of alkali-activated materials (AAMs) with slag (GGBFS) and CSP as precursors, and examined their chemical and microstructural characteristics by X-ray diffraction (XRD) and scanning electron microscope (SEM) analysis. Experimental results clarified in detail the performance features and influencing factors of AAM made from a blend of CSP and slag, and indicated that CSP can be utilized as an inactive precursor in a large blending ratio (50–80%) to produce AAMs with high strength and excellent durability. The GGBFS/CSP-based AAMs have high flexural strength, reaching up to 1/5 ~ 1/6 of the compressive strength, surpassing 15.0 MPa. The AAMs using CSP almost retain the crystals from CSP within them, and the presence of CSP particles fragments C-A-S-H gels of polymerization reaction product, making them granular and discontinuous. Compared to the siliceous CSP, the limestone CSP slightly enhanced the strength properties of AAM.