Concrete in 2020s: LC3 / calcined clay
Read the condition on Concrete before the nickname. Year 2020s, line “LC3 / calcined clay,” figure 3. What holds Concrete together is not the nickname. Formula C-S-H binder + aggregate, density ~2400 kg/m³.
Scores compare Concrete with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates. Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.
Concrete (C-S-H binder + aggregate) is a family of grades whose density ~2400 kg/m³, heat band does not melt; dehydrates and spalls, and fire letter A1. Concrete is sold as grades, not as a single substance. Chemistry C-S-H binder + aggregate, density ~2400 kg/m³, heat band does not melt; dehydrates and spalls.
This atlas treats Concrete as a system: mill route, coatings, tests and the cavity it sits in. Conductivity note: ~1.4 W/m·K. Insulation score 22/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: A1. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.
The label keeps Concrete, 2020s, and 3. “LC3 / calcined clay” is the condition on the figure.2020s
Figures to keep
- Year of the condition
- 2020s
- Property figure
- 3
- Material
- Concrete
- Use line
- LC3 / calcined clay
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