The properties of high-ductility engineered geopolymer composites developed with different design parameters

Güneş M., Öz H. Ö., YÜCEL H. E.

EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING, cilt.29, sa.8, ss.1552-1576, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 8
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1080/19648189.2024.2445553
  • Dergi Adı: EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Compendex, ICONDA Bibliographic, INSPEC
  • Sayfa Sayıları: ss.1552-1576
  • Anahtar Kelimeler: ECC, EGCs, high-ductility, mechanical and microstructural properties, rheological
  • Hatay Mustafa Kemal Üniversitesi Adresli: Evet

Özet

This study aimed to develop engineered geopolymer composites (EGCs) having considerably greater ductility than that of the engineered cementitious composite (ECC) for similar compressive strength. For this, three groups of fly ash (FA)-based EGC mixtures with different total binder (AL+FA) and alkali liquids/fly ash (AL/FA) were produced. After observing similar workability characteristics for EGCs and ECC, EGCs were subjected to three different initial curing conditions: 48 h at 100 degrees C, 24 h at 100 degrees C, and 24 h at 70 degrees C. The test results showed that almost all of EGCs exhibited the strain-hardening behaviour. While the curing temperature and time increased, the compressive strength and flexural strength of EGCs improved as well as the decreasing ductility. Moreover, mechanical properties including ductility were enhanced by the increment of AL+FA. EGCs cured at 70 degrees C for 24 h showed ultra-ductile behaviour. The results were also supported by XRD, TGA/DTA and FTIR.