Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparative analysis of the mechanical performance index and microstructural parameters.
| C100F00S00 | C80F20S00 | C60F20S20 | C40F20S40 | C20F20S60 | ||
|---|---|---|---|---|---|---|
| Compressive strength (MPa) | 3 d | 34.6 | 25.8 | 19.4 | 12.2 | - |
| 7 d | 40.2 | 37.5 | 29.9 | 18.5 | 5.4 | |
| 28 d | 47.7 | 51.7 | 50.2 | 37.3 | 8.3 | |
| Porosity | 28 d | 0.359 | 0.292 | 0.309 | 0.335 | 0.351 |
