Table 5 Descriptive statistics of the input and target variables used in the ML models before outlier removal consideration.
| Â | Variables | Count | Mean | Min | Max | Std. Dev | 25% | 50% | 75% |
|---|---|---|---|---|---|---|---|---|---|
Input Parameters | Water (kg/m3) | 1073 | 165.15 | 8.46 | 1049.39 | 96.00 | 122.50 | 168.00 | 189.00 |
Cement (kg/m3) | 1073 | 340.23 | 13.02 | 2384.97 | 189.34 | 250.96 | 344.10 | 414.00 | |
Slag (kg/m3) | 1073 | 42.40 | 0.00 | 1284.44 | 113.99 | 0.00 | 0.00 | 83.65 | |
Fly ash (kg/m3) | 1073 | 34.79 | 0.00 | 735.00 | 116.06 | 0.00 | 0.00 | 0.00 | |
Silica fume (kg/m3) | 1073 | 7.68 | 0.00 | 468.50 | 31.19 | 0.00 | 0.00 | 0.00 | |
Fine aggregate (kg/m3) | 1073 | 755.99 | 0.00 | 1574. 10 | 236.82 | 688.79 | 769.48 | 835.00 | |
Coarse aggregate (kg/m3) | 1073 | 846.61 | 0.00 | 1704.00 | 325.52 | 607.00 | 957.00 | 1064.93 | |
Superplasticizer (kg/m3) | 1073 | 1.53 | 0.00 | 10 20 | 1.94 | 0.00 | 0.00 | 3.00 | |
Fresh density (kg/m3) | 1073 | 2211.57 | 1364.00 | 2467.00 | 234.15 | 2162.00 | 2297.40 | 2379.90 | |
Comp. str. test age (days) | 1073 | 28.54 | 7.00 | 180.00 | 16.16 | 28.00 | 28.00 | 28.00 | |
Compressive strength (MPa) | 1073 | 46.62 | 18.90 | 80 00 | 11.63 | 38.99 | 46.37 | 54.60 | |
Migration test age (days) | 1073 | 120.07 | 3.00 | 2880.00 | 264.77 | 28 00 | 28.00 | 91.00 | |
Output | Dnssm (× 10−12 m2/s) | 1073 | 8.010 | 0.220 | 133.600 | 8.496 | 3.466 | 6.600 | 9.679 |
