A green approach to construction: Fly ash-based one-part geopolymer foam concrete reinforced with waste concrete powder and polypropylene fibers

Faraji, Md Foysal; AHISKALI, Adem; BAYRAKTAR, Oğuzhan Yavuz; Ahıskalı, Mehtiali; Kaplan, Gökhan; Aydın, Abdulkadir Cüneyt; Özbakkaloğlu, Togay

doi:10.1016/j.conbuildmat.2025.143429

A green approach to construction: Fly ash-based one-part geopolymer foam concrete reinforced with waste concrete powder and polypropylene fibers

Yazarlar (7)
Md Foysal Faraji
Dr. Öğr. Üyesi Adem AHISKALI Kurum Bilgileri Mühendislik ve Mimarlık Fakültesi İnşaat Mühendisliği Ulaştırma Özgeçmiş Sayfası İletişim Bilgileri: (366)280-1000 Türkiye
Doç. Dr. Oğuzhan Yavuz BAYRAKTAR Kurum Bilgileri Mühendislik ve Mimarlık Fakültesi İnşaat Mühendisliği Mekanik Özgeçmiş Sayfası İletişim Bilgileri: (366)280-1000 Türkiye
Mehtiali Ahıskalı
Gökhan Kaplan Türkiye
Abdulkadir Cüneyt Aydın Türkiye
Togay Özbakkaloğlu

Devamını Göster

Özet

Making concrete in the usual way produces a lot of carbon dioxide, so we need new ways to make building materials that are better for the environment. This study investigates the feasibility of producing one-part geopolymer foam concrete (GFC), utilizing Class F fly ash partially replaced by waste concrete powder (WCP) and reinforced with polypropylene (PP) fibers. Twelve mixes were prepared with 0–50 % WCP (by fly-ash mass) and 0–0.9 % PP fibers (by volume). The effects of these variations on fresh state properties, mechanical strength, density, thermal conductivity, porosity, chemical durability (against acid and sulfate attack), freeze-thaw resistance, and thermal durability were systematically evaluated. Replacing 25 % of fly ash with WCP maximized 28-day compressive strength at 5.97 MPa, an 80 % improvement over the control mix. Durability peaked when WCP and fibers were combined: the 10 % WCP + 0.9 % PP fiber mix retained 3.65 MPa and 3.35 MPa after 120 days in H2SO4 and MgSO4 attack, respectively, while the 25 % WCP + 0.3 % PP fiber mix lost only 1.02 % mass after 25 freeze-thaw cycles. Thermal stability was highest for the 25 % WCP + 0.9 % PP fiber blend, which preserved 76.5 % of its original strength at 900°C. These results demonstrate that moderate WCP substitution governs strength, whereas PP fiber dosage controls durability. Integrating both waste valorization and fiber reinforcement in GFC yields a lightweight, low-carbon concrete with balanced mechanical performance and robust resistance to chemical, thermal, and freeze-thaw degradation.

Anahtar Kelimeler

Geopolymer Foam Concrete | One-Part Geopolymer | Polypropylene Fiber Reinforcement | Sustainability and Durability in Construction | Waste Concrete Powder Recycling

Makale Türü	Özgün Makale
Makale Alt Türü	SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı	Construction and Building Materials
Dergi ISSN	0950-0618 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler	SCI-Expanded
Dergi Grubu	Q1
Makale Dili	İngilizce
Basım Tarihi	10-2025
Cilt No	494
Sayı	143429
Doi Numarası	10.1016/j.conbuildmat.2025.143429
Makale Linki	https://doi.org/10.1016/j.conbuildmat.2025.143429

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A green approach to construction: Fly ash-based one-part geopolymer foam concrete reinforced with waste concrete powder and polypropylene fibers

Akademisyenler > Oğuzhan Yavuz BAYRAKTAR > Yayın Detayı

A green approach to construction: Fly ash-based one-part geopolymer foam concrete reinforced with waste concrete powder and polypropylene fibers

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