Assessment of mechanical properties of fiber reinforced cementitious system exposed to high temperature

Biricik Ö., Bayqra S. H., Kaya Y., Mardani A.

STRUCTURAL CONCRETE, cilt.24, sa.4, ss.4733-4750, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 4
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1002/suco.202200961
  • Dergi Adı: STRUCTURAL CONCRETE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.4733-4750
  • Anahtar Kelimeler: basalt fiber, capillary water absorption, dynamic modulus of elasticity, high-temperature properties, polyamide fiber, polypropylene fiber, HIGH-PERFORMANCE CONCRETE, BASALT FIBER, POLYPROPYLENE FIBERS, STRENGTH, MICROSTRUCTURE, RESISTANCE, REDUCTION, BEHAVIOR, MORTAR
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

In this study, it was aimed to determine the optimum fiber type and usage ratio by examining the effect of fiber type and usage rate on the properties of mortar mixtures exposed to high temperatures such as 300 degrees C, 450 degrees C, and 600 degrees C. For this purpose, mixtures were prepared by substituting polypropylene (PP), polyamide (PA) and basalt (B) fibers in proportions as 0.25%, 0.50%, 0.75%, and 1% instead of aggregate. Unit weight, compressive-flexural strength, ultrasonic pulse velocity (UPV), and permeability properties of mixtures were determined. Regardless of fiber type, flexural strength and permeability increased, UPV decreased with the addition of fiber. Basalt fiber mixtures exhibited the highest performance in terms of flexural strength. PP fiber mixtures exhibited the best performance in terms of permeability, ultrasonic pulse velocity and dynamic modulus of elasticity. SEM analyzes showed that PP fibers exposed to 600 degrees C melted, leading to the formation of channel voids. According to TGA result, approximately 15% mass loss was observed in the control sample at 600 degrees C.