Concrete in : C25/30
Read the condition on Concrete before the nickname. Year , line “C25/30,” figure 25. If a salesperson quotes a single “safety score”, ask which standard, which thickness, which year.
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.
Origin: Roman pozzolana; Aspdin 1824; Hennebique RC, Rome → Leeds → Paris. The process chapter follows feedstock → conversion → forming → finish → install. Uses span buildings to defence / safety. Pairings matter: steel. Circularity mark 30/100. Ask which scrap, which certificate, which year.
Related atlas entries, a short glossary, and three threads that keep Concrete honest. Interior fire linings on concrete frames. The other mass-timber rival for mid-rise. EN 13501-1 reaction-to-fire letter (A1–F), not a wall rating. Thermal conductivity in W/m·K. Lower means better bulk insulation.
The label keeps Concrete, , and 25. “C25/30” is the condition on the figure.25
Figures to keep
- Year of the condition
- 25
- Property figure
- 25
- Material
- Concrete
- Use line
- C25/30