Green ECC and Sustainability

1. Learning objectives

• Define Green ECC in the Atlas sense.
• Identify main sustainability strategy families.
• Explain why performance must be retained.

2. Key concepts

• Green ECC
• SCMs
• AAS
• Geopolymer EGC
• Recycled fibers
• LC3
• Life-cycle thinking

3. Minimal theory

Green ECC requires lower environmental burden and retained ECC function. Low-carbon ingredients alone are insufficient if strain-hardening or crack control is lost.

4. Source-grounded evidence

• Node: 04_material_systems/green_ecc.md.
• Map: 07_visualization/green_ecc_strategy_map.md.
• Matrix: 07_visualization/sustainable_ecc_extension_claim_evidence_matrix.csv.

5. Representative papers

• Li 2019 Chapter 8.
• Lee 2012 AAS mortar.
• Choi 2022 PE selvage ECC.
• Yu 2018 recycled PET SHCC.

6. Figures/tables to show later

• Green ECC strategy map.
• Sustainability vs performance table.
• LCA/cost/CO2 examples.

7. Discussion questions

1. Why is greenness without PSH not Green ECC?
2. Which green strategy is most scalable?
3. How should cost, carbon, and ductility be balanced?

8. Assignment idea

Choose one Green ECC strategy and list performance risks to check.

9. Linked Atlas nodes

• 04_material_systems/green_ecc.md
• 02_concepts/sustainability.md
• 04_material_systems/geopolymer_ecc.md
• 07_visualization/green_ecc_strategy_map.md

10. Suggested reading path

1. 04_material_systems/green_ecc.md
2. 07_visualization/green_ecc_strategy_map.md

Evidence files

• 07_visualization/foundational_papers_claim_evidence_matrix.csv
• 07_visualization/extreme_ductility_extension_claim_evidence_matrix.csv
• 07_visualization/sustainable_ecc_extension_claim_evidence_matrix.csv
• 07_visualization/by_lee_lab_publications_claim_evidence_matrix.csv