Table 4.
Cumulative release for the elements considered at an L/S equal to 4 L/kg. (The results obtained from the concrete mixer are not shown). Reduction rates are calculated on the raw sample for increasing abrasion (Abr.) times.
| Parameter | Plant A | Plant B | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Concentration | Reduction Rate | Concentration | Reduction Rate | |||||||
| Raw | Abr. 60′ | Abr. 120′ | Abr. 60′ | Abr. 120′ | Raw | Abr. 60′ | Abr. 120′ | Abr. 60′ | Abr. 120′ | |
| Major Elements (mg/kg) | ||||||||||
| Cl− | 3244 ± 111 | 2329 ± 275 | 1589 ± 123 | −28% | −51% | 1043 ± 102 | 872 ± 56 | 774 ± 27 | −16% | −26% |
| SO42− | 1587 ± 73 | 1160 ± 42 | 806 ± 39 | −27% | −49% | 2037 ± 70 | 1441 ± 76 | 1132 ± 54 | −29% | −44% |
| DOC | 264 ± 16 | 180 ± 11 | 120 ± 9 | −32% | −55% | 157 ± 24 | 117 ± 3 | 96 ± 5 | −26% | −39% |
| Ca | 1360 ± 134 | 887 ± 33 | 668 ± 23 | −35% | −51% | 529 ± 29 | 404 ± 16 | 325 ± 8 | −24% | −39% |
| K | 627 ± 19 | 454 ± 36 | 345 ± 20 | −27% | −45% | 249 ± 21 | 203 ± 11 | 176 ± 7 | −19% | −29% |
| Na | 1224 ± 33 | 912 ± 78 | 711 ± 46 | −25% | −42% | 834 ± 80 | 674 ± 45 | 587 ± 33 | −19% | −30% |
| Minor Elements (μg/kg) | ||||||||||
| Al | 3913 ± 769 | 9822 ± 1267 | 17290 ± 4085 | 151% | 342% | 7222 ± 521 | 6192 ± 167 | 5964 ± 195 | −14% | −17% |
| B | 495 ± 126 | 373 ± 13 | 698 ± 167 | −25% | 41% | 1891 ± 124 | 1593 ± 51 | 1815 ± 228 | −16% | −4% |
| Ba | 639 ± 62 | 557 ± 15 | 476 ± 28 | −13% | −25% | 220 ± 9 | 219 ± 12 | 206 ± 5 | −1% | −7% |
| Co | 11 ± 4 | 16 ± 2 | 18 ± 3 | 44% | 55% | 37 ± 4 | 49 ± 11 | 57 ± 3 | 33% | 52% |
| Cr | 276 ± 45 | 152 ± 17 | 141 ± 15 | −45% | −49% | 469 ± 76 | 290 ± 67 | 221 ± 43 | −38% | −53% |
| Cu | 1613 ± 76 | 868 ± 61 | 619 ± 135 | −46% | −62% | 448 ± 118 | 301 ± 172 | 181 ± 31 | −33% | −60% |
| Fe | 181 ± 65 | 206 ± 41 | 216 ± 42 | 14% | 19% | 323 ± 83 | 245 ± 19 | 316 ± 49 | −24% | −2% |
| Li | 500 ± 42 | 285 ± 17 | 184 ± 4 | −43% | −63% | 94 ± 8 | 56 ± 6 | 40 ± 6 | −41% | −58% |
| Mg | 351 ± 54 | 337 ± 8 | 460 ± 44 | −4% | 31% | 347 ± 36 | 284 ± 53 | 337 ± 21 | −18% | −3% |
| Mn | 9 ± 1 | 13 ± 2 | 10 ± 2 | 40% | 6% | 20 ± 3 | 18 ± 3 | 22 ± 2 | −10% | 10% |
| Mo | 586 ± 14 | 498 ± 19 | 440 ± 14 | −15% | −25% | 400 ± 18 | 375 ± 46 | 368 ± 39 | −6% | −8% |
| Ni | 38 ± 16 | 27 ± 17 | 30 ± 4 | −28% | −21% | 67 ± 14 | 96 ± 17 | 104 ± 15 | 43% | 54% |
| Sr | 8528 ± 700 | 5552 ± 263 | 3589 ± 39 | −35% | −58% | 1955 ± 89 | 1555 ± 118 | 1208 ± 38 | −20% | −38% |
| Ti | 45 ± 1 | 43 ± 3 | 43 ± 1 | −5% | −6% | 99 ± 1 | 100 ± 3 | 100 ± 1 | 1% | 0% |
| V | 203 ± 19 | 144 ± 6 | 126 ± 9 | −29% | −38% | 145 ± 8 | 144 ± 4 | 143 ± 5 | 0% | −1% |
| Zn | 166 ± 37 | 143 ± 65 | 110 ± 33 | −14% | −34% | 80 ± 31 | 265 ± 138 | 20 ± 1 | 233% | −75% |