Test items | Mold | Core | |
Compressive strength (MPa) | 7.45 | 7.91 | |
Heavy metals (mg/L) | Cu | 0.063 | 0.067 |
Pb | ND | ND | |
As | ND | ND | |
Cd | ND | ND | |
Zn | 0.513 | 0.537 |