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Source: 06_lab_position/our_lab_position_map.md open raw

Bang Yeon Lee Lab Positioning Map

Status

1. Research identity

Professor Bang Yeon Lee’s ECC/EGC research positions the lab at the intersection of micromechanics-based ductile cementitious composites, cementless/green binder systems, recycled fiber and textile-waste valorization, and self-healing / crack-width-controlled durability.

The lab’s distinctive contribution is not only adopting ECC theory, but repeatedly transferring it into difficult material spaces: alkali-activated slag, fly ash geopolymer, recycled selvage fibers, crumb-rubber and EPS flaw-tailored matrices, hybrid PE/PVA/PBO systems, and crack-healing durability tests.

Victor Li micromechanics
  -> strain-hardening and crack-width control
    -> Lee lab cementless / recycled / self-healing / ultra-ductile systems
      -> sustainable and resilient infrastructure materials

2. Main lab research axes

A. Cementless alkali-activated and geopolymer ductile composites

Positions the lab as an early and sustained contributor to Green ECC / EGC, from feasibility of AAS strain-hardening mortar to ultra-ductile fly ash and slag geopolymer composites.

B. Extreme ductility and low-density / flaw-tailored EGC

Connects crumb rubber, EPS, lightweight design, and PE/PBO hybridization to very high tensile strain capacity at reduced cement or fiber burden.

C. Recycled selvage fiber and textile-waste ECC

Converts high-performance PE textile waste into structural ductile composites with strong cost and sustainability arguments.

D. Self-healing, crack healing, and durability recovery

Uses ECC crack-width control and fiber bridging to study autogenous healing, permeability recovery, and reloading performance.

E. Fiber/interface/micromechanics and testing methods

Includes early fiber dispersion, fiber bridging, interface and prediction work supporting material design.

F. Structural, impact, thermal, and application performance

Extends ductile composites into flexure, impact, layered composites, elevated temperature and residual performance.

3. Representative lab publications by theme

cementless / alkali-activated / geopolymer ECC

fiber / interface / micromechanics

general ECC/SHCC contribution

recycled / waste-derived material ECC

self-healing and crack recovery

structural / impact / repair application

4. Strategic positioning highlights

5. Global Atlas connections

Lab research axis Global Atlas nodes Strategic claim
Cementless AAS / EGC green_ecc, geopolymer_ecc, alkali_activated_binders, extreme_ductility_ecc The lab extends ECC micromechanics into cementless and low-carbon binders.
Recycled selvage fibers green_ecc, circular_economy_materials, fiber_dispersion, direct_tensile_test The lab converts high-value textile waste into ductile structural composite reinforcement.
Self-healing self_healing_ecc, self_healing_mechanisms, permeability, crack_width_distribution The lab links fiber bridging and controlled cracks to autogenous healing reliability.
Flaw-tailored low-density EGC flaw_design, matrix_tailoring, matrix_fracture_toughness, single_fiber_pullout The lab treats defects as design variables to activate multiple cracking at lower fiber dosage or density.
Hybrid fibers and thermal performance fiber_hybridization, interface_properties, elevated_temperature_testing The lab combines ductile PE with thermally stable or hydrophilic fibers to balance ductility and residual performance.

6. Evidence files

7. Next work

  1. Add original PDFs when available and mark original_pdf_status = available.
  2. Convert this map into individual positioning cards for AAS/EGC, recycled selvage fiber, self-healing, and low-fiber/flaw-tailored EGC.
  3. Build 07_visualization/lab_to_global_lineage_map.md from by_lee_lab_position_edges.csv.
  4. Use the resulting positioning to draft manuscript introduction/discussion and proposal background sections.