Akademik Veri Yönetim Sistemi
INTERNATIONAL JOURNAL OF BUILDING PATHOLOGY AND ADAPTATION, ss.1-22, 2025 (ESCI, Scopus)
PurposeThis study investigates the influence of alkali-treated Phragmites australis (PA) biofibers with varying lengths and contents on the mechanical and shrinkage properties of cement mortar composites, contributing to the development of sustainable and durable construction materials.Design/methodology/approachMortar specimens were prepared by incorporating PA fibers at three lengths (2 cm, 3 cm, and 4 cm) and four volume fractions (0.5%, 1%, 1.5%, and 2%). The samples were cured for 90 days. Key properties evaluated included compressive strength, flexural strength, density, ultrasonic pulse velocity (UPV), autogenous shrinkage, drying shrinkage, and expansion. A comparative analysis was performed to identify the optimal fiber configuration.FindingsThe results demonstrated that fiber length and content significantly affect mortar performance. Specifically, 2 cm fibers enhanced flexural strength and drying shrinkage resistance. It achieved an increase of 16% and a decrease of 20.16% compared to the control mix, respectively. However, 4 cm fibers were most effective in controlling autogenous shrinkage and expansion, where they recorded a decrease of 25.2 and 24.5%, respectively, compared to the control mix. The 3 cm fibers contributed positively to compressive strength, density, and UPV. An optimal fiber content of 1% was identified, offering the best balance between strength and durability. Excessive fiber content negatively impacted performance due to weak fiber-matrix bonding.Originality/valueThis research highlights the feasibility of using alkali-treated biofibers as reinforcement in cementitious composites, offering insights into fiber-matrix interactions and long-term performance, which are critical for advancing eco-friendly construction technologies.