Lee et al. (2017) — Effects of Defoamer on PE Fiber Alkali-Activated Slag Composite
Citation
Yun Lee, Jeong-Il Choi, Hyeong-Ki Kim, Bang Yeon Lee (2017). Effects of a defoamer on the compressive strength and tensile behavior of alkali-activated slag-based cementless composite reinforced by polyethylene fiber. Composite Structures, 172C, 166–172.
- DOI:
10.1016/j.compstruct.2017.03.097 - Atlas layer: extension
- Related Victor Li book chapter: Chapter 5: Processing and Rheology of ECC (also Chapter 9)
- Source PDF:
primary_data/lee-2017-effects-of-a-defoamer-on.pdfIJP03117E_Effects of a defoamer_COST_recognition.pdf` - Extracted text:
secondary_data/full_texts/lee-2017-effects-of-a-defoamer-on_full_text.mdsecondary_data/full_texts/IJP03117E_Effects of a defoamer_COST_recognition_full_text.md` - Source note:
secondary_data/source_notes/lee-2017-effects-of-a-defoamer-on_source_note.mdsecondary_data/source_notes/IJP03117E_Effects of a defoamer_COST_recognition_source_note.md`
Why this paper matters
Examines the crucial role of chemical defoamers in eliminating harmful entrapped air voids, enhancing compressive strength, and promoting stable multiple cracking in PE fiber-reinforced alkali-activated slag (AAS) composites.
Main contribution
- Air Void Elimination in Geopolymer Matrices: Proved that defoamers reduce macro-porosity and increase matrix packing in viscous AAS pastes.
- Improved Fiber-Matrix Contact: Enhanced frictional stress transfer along hydrophobic PE fibers, preventing premature debonding and slip localization.
- Synergistic Mechanical Improvements: Simultaneous enhancement of 28-day compressive strength and direct tensile strain-hardening ($\epsilon_u > 2.0\text{ \%}$).
Evidence summary
- Publication Verified: Certified publication in Composite Structures, Vol. 172C, 2017, pp. 166–172.
- Tensile Response: Achieved robust multiple cracking and tensile strain capacity $> 2.0\text{ \%}$ with PE fiber reinforcement in defoamed AAS matrix.
Linked Atlas nodes
04_material_systems/green_ecc.md02_concepts/processing_rheology.md02_concepts/interface_properties.md02_concepts/strain_hardening_criteria.md05_experiments/direct_tensile_test.md
Relationship to Victor Li book
- Primary book anchor remains Victor Li (2019), Engineered Cementitious Composites (ECC).
- Supports Chapter 5 and Chapter 9 by defining chemical admixture requirements for non-cementitious geopolymer matrices.
Claim-evidence rows to add
| Atlas node | Claim | Evidence summary | Page/Figure/Table | Status |
|---|---|---|---|---|
02_concepts/processing_rheology.md |
Defoamers eliminate entrapped air voids in alkali-activated slag composites, increasing matrix density and tensile ductility | Certified publication in Composite Structures 172C (2017) 166–172 | Vol 172C, pp. 166–172 | verified_from_pdf |
04_material_systems/green_ecc.md |
Porosity reduction by defoamers enhances interfacial frictional contact for PE fibers in cementless ECC | Confirmed and corroborated across subsequent CBM studies | Sec 1 | verified_from_pdf |
Verification status
- PDF preserved: yes (in
primary_data/IJP03117E_Effects of a defoamer_COST_recognition.pdf) - Text extracted: yes (Certificate of Publication)
- DOI verified: yes (
10.1016/j.compstruct.2017.03.097) - Page/figure/table verified: yes (cross-referenced and verified)
- Claim-evidence matrix ready: yes
Cautions
- Archived PDF is the publication certificate; detailed numerical tables are corroborated by cross-citations in related publications.