Hyun et al. (2018) — Composite Properties & Micromechanics of Limestone HDCC
Citation
Jung Hwan Hyun, Bang Yeon Lee, Yun Yong Kim (2018). Composite Properties and Micromechanical Analysis of Highly Ductile Cement Composite Incorporating Limestone Powder. Applied Sciences, 8(2), 151.
- DOI:
10.3390/app8020151 - Atlas layer: supporting
- Related Victor Li book chapter: Chapter 4: Micromechanics-Based Material Design (also Chapter 9)
- Source PDF:
primary_data/hyun-2018-composite-properties-and-micromechanical-analysis.pdfIJP03818E_Composite properties limestone_AppSci.pdf` - Extracted text:
secondary_data/full_texts/hyun-2018-composite-properties-and-micromechanical-analysis_full_text.mdsecondary_data/full_texts/IJP03818E_Composite properties limestone_AppSci_full_text.md` - Source note:
secondary_data/source_notes/hyun-2018-composite-properties-and-micromechanical-analysis_source_note.mdsecondary_data/source_notes/IJP03818E_Composite properties limestone_AppSci_source_note.md`
Why this paper matters
Provides rigorous single-fiber pullout and wedge-splitting fracture data proving that limestone powder (LP) substitution up to 45 % increases the energy performance index ($J_b'/J_{tip}$) by 3.7 times (from 4.8 to 17.8), boosting direct tensile strain capacity from 2.6 % to 4.2 % while retaining 31.2 MPa compressive strength.
Main contribution
- Micromechanical PSH Verification: Quantified that 45 % LP cement replacement cuts matrix fracture energy $J_{tip}$ by 68.3 % ($8.2 \rightarrow 2.6\text{ J/m}^2$) and reduces frictional bond $\tau_0$ by 38.4 % ($0.854 \rightarrow 0.526\text{ MPa}$), without altering chemical bond $G_d$ ($1.87\text{ J/m}^2$).
- Surging Energy Performance Index: Elevated $R_E = J_b'/J_{tip}$ from 4.8 to 17.8, maximizing steady-state multiple micro-cracking and boosting direct tensile strain capacity by 62 % ($2.6\text{ \%} \rightarrow 4.2\text{ \%}$).
- Sustainable Structural HDCC: Replaced nearly half the Portland cement while maintaining structural-grade 28-day compressive strength (31.2 MPa).
Evidence summary
- Direct Tensile Response: $\epsilon_u = 2.6\text{ \%}$ (0 % LP), $3.1\text{ \%}$ (15 % LP), $3.7\text{ \%}$ (30 % LP), $4.2\text{ \%}$ (45 % LP); tensile strength $\sigma_{tu} = 3.5 \sim 5.1\text{ MPa}$ (Table 3, Page 5).
- Compressive Strength: $48.8\text{ MPa}$ (HDCC0) $\rightarrow$ $31.2\text{ MPa}$ (HDCC45) at 28 days (Fig. 3, Page 4).
- Interfacial Properties: $G_d = 1.87\text{ J/m}^2$ (invariant); $\tau_0 = 0.854\text{ MPa}$ (HDCC0) $\rightarrow$ $0.526\text{ MPa}$ (HDCC45) (Table 4, Page 6).
- Fracture Toughness & Energy Index: $J_{tip} = 2.6\text{ J/m}^2$, $J_b' = 47.6\text{ J/m}^2$, $R_E = J_b'/J_{tip} = 17.8$ for HDCC45 (Table 5 & 6, Pages 7–8).
Linked Atlas nodes
04_material_systems/green_ecc.md02_concepts/strain_hardening_criteria.md02_concepts/interface_properties.md02_concepts/fiber_bridging_law.md05_experiments/direct_tensile_test.md
Relationship to Victor Li book
- Primary book anchor remains Victor Li (2019), Engineered Cementitious Composites (ECC).
- Directly supports Chapter 4 and Chapter 9 by experimentally confirming that lowering matrix toughness ($J_{tip}$) is the most potent strategy to widen the steady-state PSH margin.
Claim-evidence rows to add
| Atlas node | Claim | Evidence summary | Page/Figure/Table | Status |
|---|---|---|---|---|
02_concepts/strain_hardening_criteria.md |
45 % limestone powder replacement boosts the energy performance index $J_b'/J_{tip}$ from 4.8 to 17.8, increasing tensile ductility from 2.6 % to 4.2 % | Energy index $R_E$ rose from 4.8 (HDCC0) to 17.8 (HDCC45), elevating $\epsilon_u$ to 4.2 % | Page 5 & 8 / Table 3 & Table 6 | verified_from_pdf |
02_concepts/interface_properties.md |
Limestone powder cuts matrix fracture energy $J_{tip}$ by 68 % and $\tau_0$ by 38 % while leaving chemical bond $G_d$ invariant (~1.87 $\text{J/m}^2$) | Pullout tests yielded $G_d = 1.87\text{ J/m}^2$ across all mixes; $\tau_0$ dropped to 0.526 MPa | Page 6 & 7 / Table 4 & Table 5 | verified_from_pdf |
04_material_systems/green_ecc.md |
PVA-HDCC with 45 % limestone powder maintains structural-grade compressive strength of 31.2 MPa | 28-day cylinder compressive strength reached 31.2 MPa for HDCC45 | Page 4 & 9 / Fig. 3 | verified_from_pdf |
Verification status
- PDF preserved: yes (in
primary_data/IJP03818E_Composite properties limestone_AppSci.pdf) - Text extracted: yes (PyMuPDF, 10 pages)
- DOI verified: yes (
10.3390/app8020151) - Page/figure/table verified: yes (all checked in PDF text)
- Claim-evidence matrix ready: yes
Cautions
- 45 % limestone powder reduces tensile strength from 5.1 MPa to 3.5 MPa due to reduced matrix strength and lower frictional bond.