Hwang et al. (2025) — From textile waste to high-performance composites: investigating the role of...

Citation

Eunyoung Hwang, Se-Eon Park, Youngsang Kim, Huy Hoàng Nguyễn, Bang Yeon Lee (2025). From textile waste to high-performance composites: investigating the role of selvage fibers in engineered cementitious composites. Journal of Building Engineering, Vol. 108, Article 112964.

• DOI: 10.1016/j.jobe.2025.112964
• Atlas layer: extension
• Related Victor Li book chapter: Chapter 4: Special ECCs / Green & Recycled Fiber ECC; Chapter 2: Micromechanics and Materials Design
• Source PDF: hwang-2025-from-textile-waste-to-high-performance.pdf
• Extracted text: atlas/full_text/hwang-2025-from-textile-waste-to-high-performance_full_text.md
• Source note: atlas/source_notes/hwang-2025-from-textile-waste-to-high-performance_source_note.md

Why this paper matters

Quantifies the micromechanical bridging mechanisms of industrial textile selvage waste fibers (81% PE + 7% Glass + 12% PET, 1.75 vol%) versus individual constituent fibers, demonstrating that selvage-reinforced ECC (SE-15) achieves 63.2 MPa compressive strength, 8.01 MPa tensile strength, 5.25% tensile strain capacity, and 70.0 µm crack widths dominated by PE fiber pullout.

Main contribution

• Isolated and analyzed individual constituent fibers (PE, GF, PET) from recycled textile selvage waste using single-fiber pullout and fiber-bridging modeling.
• Proved that selvage ECC (SE-15) achieves ductile strain hardening ($\sigma_{ts} = 8.01\text{ MPa}$, $\varepsilon_{ts} = 5.25\%$) exceeding standard ECC-M45 ($5.9\text{ MPa}$, $2.2\%$).
• Demonstrated that the 81 vol% PE outer fraction provides the dominant frictional bridging ($\tau_0 = 1.45\text{ MPa}$), whereas core GF and PET rupture prematurely without compromising composite pseudo strain hardening.

Evidence summary

• Mechanical properties:
• SE-15 (Selvage ECC): $f_{cu} = 63.2\pm 2.43\text{ MPa}$, $f_{cr} = 3.55\pm 0.23\text{ MPa}$, $f_{ts} = 8.01\pm 0.98\text{ MPa}$, $\varepsilon_{ts} = 5.25\pm 0.71\%$ (Table 4, 5, Fig. 7a).
• PE-15 (Pure PE): $f_{cu} = 63.8\text{ MPa}$, $f_{ts} = 12.51\text{ MPa}$, $\varepsilon_{ts} = 5.96\%$.
• GF-15: $f_{cu} = 52.7\text{ MPa}$, $f_{ts} = 5.45\text{ MPa}$, $\varepsilon_{ts} = 0.03\%$ (brittle).
• PET-15: $f_{cu} = 62.4\text{ MPa}$, $f_{ts} = 2.53\text{ MPa}$, $\varepsilon_{ts} = 0.20\%$ (softening).
• Crack patterns: SE-15 developed $59.9\pm 3.89$ cracks with mean spacing $1.34\text{ mm}$ and average crack width $70.0\pm 7.98\ \mu\text{m}$ (Table 6, Fig. 8).
• Micromechanics: Matrix $K_m = 0.65\text{ MPa}\cdot\text{m}^{0.5}$; PE single-fiber $\tau_0 = 1.45\text{ MPa}$; theoretical bridging peak $\sigma_{B,peak} = 8.52\text{ MPa}$ at $\delta = 100\ \mu\text{m}$ (Tables 7, 8, Figs. 9, 11).

Linked Atlas nodes

• 04_material_systems/green_ecc.md
• 02_concepts/strain_hardening_criteria.md
• 05_experiments/single_fiber_pullout.md
• 05_experiments/direct_tensile_test.md

Claim-evidence rows to add

Verification status

• PDF preserved: yes (hwang-2025-from-textile-waste-to-high-performance.pdf)
• Text extracted: yes (atlas/full_text/hwang-2025-from-textile-waste-to-high-performance_full_text.md)
• DOI verified: yes (10.1016/j.jobe.2025.112964)
• Page/figure/table verified: yes
• Claim-evidence matrix ready: yes

Cautions

• Secondary GF fibers degrade in high-alkaline matrix pore solution, reducing composite compressive strength in pure GF mixtures.