Table 2.
Descriptive statistical values of input factors for the flexural strength dataset.
| Parameter | RCA Replacement Ratio (%) | Parent Concrete Strength (MPa) | Bulk Density of NA (kg/m3) | Bulk Density of RCA (kg/m3) | Water Absorption of NA (%) | Water Absorption of RCA (%) | Aggregate–Cement Ratio (a/c) | Effective Water–Cement Ratio (weff/c) | Nominal Maximum NA Size (mm) | Nominal Maximum RCA Size (mm) | Los Angeles Abrasion of NA | Los Angeles Abrasion of RCA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | 50.74 | 4.32 | 1704.24 | 1823.81 | 0.70 | 4.15 | 3.05 | 0.52 | 19.40 | 19.23 | 9.32 | 12.82 |
| Range | 100.00 | 100.00 | 2820.00 | 2578.00 | 2.10 | 11.90 | 6.00 | 0.87 | 30.00 | 32.00 | 32.00 | 41.40 |
| Mode | 100.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.80 | 0.50 | 20.00 | 20.00 | 0.00 | 0.00 |
| Maximum | 100.00 | 100.00 | 2820.00 | 2578.00 | 2.10 | 11.90 | 6.00 | 0.87 | 30.00 | 32.00 | 32.00 | 41.40 |
| Minimum | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Median | 50.00 | 0.00 | 2590.00 | 2336.00 | 0.50 | 4.70 | 2.90 | 0.50 | 20.00 | 20.00 | 0.00 | 0.00 |
| Standard Error | 3.42 | 1.50 | 108.88 | 85.16 | 0.06 | 0.24 | 0.07 | 0.01 | 0.34 | 0.38 | 1.05 | 1.36 |
| Standard Deviation | 40.30 | 17.65 | 1283.62 | 1004.03 | 0.70 | 2.81 | 0.81 | 0.14 | 4.00 | 4.49 | 12.33 | 15.99 |
| Sum | 7053.00 | 600.00 | 236,890.00 | 253,509.00 | 96.90 | 577.28 | 423.40 | 71.75 | 2696.00 | 2673.00 | 1294.90 | 1781.30 |
NA: natural aggregate, RCA: recycled concrete aggregate.