| C–C | Carbonation and compressive stress | kAu | Air permeability coefficient |
| RC | Reference concrete | DC | Carbonation depth |
| SL | Stress level | dA | Average pore diameter |
| MIP | Mercury intrusion porosimetry | dM-A | Median pore diameter (area) |
| GRA | Gray relational analysis | dM-V | Median pore diameter (volume) |
| PVD | Pore volume distribution | PROPS | Proportion of saturation pores |
| C–S–H | Calcium silicate hydrates | PROPT | Proportion of transition pores |
| CH | Calcium hydroxide | PROPK | Proportion of Knudsen pores |
| SPSS | Statistical Product and Service Solutions software | PROPF | Proportion of Fick pores |
| γ | Gray relational grade |
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