Liao et al. (2022) — Compression-shear performance and failure criteria of seawater...

Citation

Qiao Liao, Yuanrui Su, Jiangtao Yu, Kequan Yu (2022). Compression-shear performance and failure criteria of seawater sea-sand engineered cementitious composites with polyethylene fibers. Construction and Building Materials, Vol. 345, Article 128386.

DOI: 10.1016/j.conbuildmat.2022.128386
Atlas layer: extension
Related Victor Li book chapter: Chapter 4: Marine/Sustainable ECC; Chapter 6: Multi-Axial Mechanics
Source PDF: liao-2022-compression-shear-performance-and-failure-criteria.pdf
Extracted text: atlas/full_text/liao-2022-compression-shear-performance-and-failure-criteria_full_text.md
Source note: atlas/source_notes/liao-2022-compression-shear-performance-and-failure-criteria_source_note.md

Why this paper matters

Groundbreaking paper characterizing the multi-axial compression-shear behavior and establishing 3D octahedral failure criteria for seawater sea-sand ECC (SS-ECC) with 0–1.5 vol% PE fibers under normal stress ratios of 3–15%, showing PE fibers eliminate brittle spalling and boost shear strength up to 22.85 MPa while providing 11.87 MPa tensile strength and 5.76% strain capacity.

Main contribution

Tested 60 cube specimens under biaxial compression-shear loading across 5 normal stress ratios ($\sigma/f_c = 3\text{--}15\%$) using digital image correlation (DIC).
Decoupled shear strength into contact friction ($\tau_f$), dilation ($\tau_d$), and cohesion/bridging ($\tau_{c+f}$), proving $\tau_{c+f}$ accounts for 29.3–51.3% of capacity.
Formulated failure envelopes based on octahedral stresses and stress invariants for finite element structural design of marine ECC components.

Evidence summary

Uniaxial properties: Compressive strength $\approx 70\text{ MPa}$; in SS-ECC-1.5%, tensile strength reached $11.87\text{ MPa}$, strain capacity reached $5.76\%$, and strain energy was $544.3\text{ kJ/m}^3$ with 23 cracks (Table 3, page 3).
Combined compression-shear: Shear strength of SS-ECC-1.5% increased from $12.18\text{ MPa}$ at $\sigma/f_c = 3\%$ to $22.85\text{ MPa}$ at $\sigma/f_c = 15\%$ (+88%) (Fig. 10, page 7).
Failure modes: Ductile multi-microcracking without spalling in SS-ECC vs brittle crushing/spalling in unreinforced mortar (Figs. 4, 5).

Linked Atlas nodes

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

Claim-evidence rows to add

Atlas node	Claim	Evidence summary	Page/Figure/Table	Status
`04_material_systems/green_ecc.md`	SS-ECC reinforced with 1.5 vol% PE fibers achieves 11.87 MPa tensile strength, 5.76% strain capacity, and 70 MPa compressive strength.	Uniaxial tensile testing verified 11.87 MPa tensile strength and 5.76% strain capacity in 1.5% PE mix.	Pages 1, 3, Section 3.1, Table 3, Fig. 2	verified_from_pdf
`02_concepts/strain_hardening_criteria.md`	Under combined compression-shear loading, PE fibers suppress brittle shear spalling, enhancing shear capacity up to 22.85 MPa at 15% normal stress ratio with cohesion/bridging contributing up to 51.3%.	Biaxial compression-shear testing verified that shear strength increased from 12.18 to 22.85 MPa as normal stress increased.	Pages 1, 4, 8, Section 3.2.3 & 3.2.4, Figs. 5, 10, 16	verified_from_pdf

Verification status

PDF preserved: yes (liao-2022-compression-shear-performance-and-failure-criteria.pdf)
Text extracted: yes (atlas/full_text/liao-2022-compression-shear-performance-and-failure-criteria_full_text.md)
DOI verified: yes (10.1016/j.conbuildmat.2022.128386)
Page/figure/table verified: yes
Claim-evidence matrix ready: yes

Cautions

Tested at normal stress ratios $\le 15\%$; shear dilation and friction behavior under high confinement ($>30\%$) requires further testing.