| RA | Recycled aggregate |
| NA | Natural aggregate |
| SSA | Steel slag aggregate |
| CSR | Cement-stabilized recycled aggregate |
| CSN | Cement-stabilized natural aggregate |
| CSRS | Cement-stabilized recycled aggregate with steel slag |
| CSS | Cement-stabilized steel slag |
| PINN | Physics-informed neural network |
| OPC | Ordinary Portland cement |
| UCS | Unconfined compressive strength |
| ITS | Indirect tensile strength |
| C&D | Construction and demolition |
| ITZ | Interfacial transition zone |
| AFt | Ettringite |
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