Yu et al. (2018) — Direct tensile properties of engineered cementitious...

Citation

Kequan Yu, Lingzhi Li, Jiangtao Yu, Yichao Wang, Junhong Ye, QingFeng Xu (2018). Direct tensile properties of engineered cementitious composites: A review. Construction and Building Materials, Vol. 165, pp. 346-362.

DOI: 10.1016/j.conbuildmat.2017.12.124
Atlas layer: extension
Related Victor Li book chapter: Chapter 1: Introduction; Chapter 2: Micromechanics; Chapter 5: Advanced ECC
Source PDF: yu-2018-direct-tensile-properties-of-engineered.pdf
Extracted text: atlas/full_text/yu-2018-direct-tensile-properties-of-engineered_full_text.md
Source note: atlas/source_notes/yu-2018-direct-tensile-properties-of-engineered_source_note.md

Why this paper matters

Comprehensive state-of-the-art review categorizing the factors governing the direct tensile properties of ECC, including fiber types (PVA vs PE vs hybrid), testing geometries, strain rate effects ($10^{-5}\text{ to }10^2\text{ s}^{-1}$), and durability mechanisms (long-term aging, high-temperature response, and cyclic fatigue).

Main contribution

Synthesized the global spectrum of ECC materials across compressive strengths of 20–150 MPa and tensile ductility levels of 3–13%.
Compared micromechanical mechanisms of hydrophilic PVA fibers (oil-coated, tight cracks $<60\ \mu\text{m}$) vs hydrophobic PE fibers (high-strength $>3000\text{ MPa}$, extreme ductility 8–13%).
Reviewed specimen geometry/size effects, rate-dependent dynamic increase factors (DIF), and environmental durability challenges.

Evidence summary

Global ECC property range: Compressive strength = 20–150 MPa, tensile strength = 4–20 MPa, tensile strain capacity = 3–12%, elastic modulus = 18–40 GPa, flexural strength = 10–50 MPa (Table 1, page 348).
Fiber comparison: PVA ($1620\text{ MPa}$, $d_f = 39\ \mu\text{m}$, 0.8–1.2% oil) vs PE ($2900\text{--}3800\text{ MPa}$, $d_f = 20\text{--}28\ \mu\text{m}$) (Table 2, page 348).
Rate sensitivity: Dynamic tensile strength and first-cracking strength increase with strain rate up to $10^2\text{ s}^{-1}$.

Linked Atlas nodes

02_concepts/extreme_ductility_ecc.md
02_concepts/interface_properties.md
05_experiments/direct_tensile_test.md
02_concepts/durability.md

Claim-evidence rows to add

Atlas node	Claim	Evidence summary	Page/Figure/Table	Status
`02_concepts/extreme_ductility_ecc.md`	Ultra-high-ductility PE fiber reinforced cementitious composites achieve tensile strength up to 20 MPa and strain capacity from 8% to 13%.	Review summarized experimental data showing PE-reinforced UHDCC delivers 8–13% strain capacity and up to 20 MPa tensile strength.	Page 348, Section 2, Table 1	verified_from_pdf
`02_concepts/interface_properties.md`	Oil coating (0.8–1.2%) on PVA fibers prevents excessive chemical bond and fiber rupture, while hydrophobic PE fibers rely on pure frictional slip without chemical adhesion.	PVA requires surface oil coating to avoid rupture, whereas PE has natural hydrophobic non-reactive interface with cement matrix.	Page 348, Section 2, Table 2	verified_from_pdf

Verification status

PDF preserved: yes (yu-2018-direct-tensile-properties-of-engineered.pdf)
Text extracted: yes (atlas/full_text/yu-2018-direct-tensile-properties-of-engineered_full_text.md)
DOI verified: yes (10.1016/j.conbuildmat.2017.12.124)
Page/figure/table verified: yes
Claim-evidence matrix ready: yes

Cautions

Review paper synthesizing diverse literature; specific experimental conditions vary across cited studies.