Research Article

Estimating the Concrete Compressive Strength Using Hard Clustering and Fuzzy Clustering Based Regression Techniques

Table 9

Equations for different clusters for estimating concrete compressive strength using LR regression.

Number of clustersClusterEquation

110.1067 C + 0.077 BFS + 0.0543 F + −0.1201 W + 0.301 S + 17.1208

210.1095 C + 0.0771 BFS + 0.5861 S − 7.3254
20.1741 C + 0.1657 BFS + 0.1278 F + 0.2454 S + 0.0714 CA + 0.0667 FA + −153.1919

310.13 C + 0.1419 BFS + −0.2008 W + −0.3707   S + 22.8639
20.116 C + 0.179 BFS + 0.0528 F + −0.155 W + 0.3605 S + 20.0435
30.109 C + 0.0332 BFS + 0.0323 F + 0.6567 S + −0.1772

410.1002 C + 0.1175 BFS + −0.4268 W + −0.5294 S + −0.0581 FA + 124.9081
20.0887 C + 0.097 BFS + −0.1639 W + −0.0381 CA + −0.0439 FA + 103.3361
30.1206 C + 0.0296 BFS + 1.0002 S + −2.3015
40.1923 C + 0.1899 BFS + 0.1096 F + 0.385 S + 0.0802 CA + 0.0748 FA + −171.2826

710.0937 C + 0.0918 BFS + 0.0816 CA + −65.026
20.0843 C + 0.0893 BFS + −0.2364 W + −0.0522 CA + −0.0542 FA + 141.3941
30.1069 C + 0.1079 W + 1.5966   S + −16.0794
40.2578 C + 0.2539 BFS + 0.176 F + 0.2456 W + 0.1289 CA + 0.1658 FA + −355.9914
50.1259 C + −0.3447 BFS + 0.1478 F + −0.233 W + 24.2414
60.2657 C + 0.2326 BFS + 0.1769 F + 0.6028 S + 0.0627 CA + 0.123 FA + −216.9787
70.1446 C + 0.1444 BFS + 0.061 F + 0.6039 S + 0.1112 CA + −121.8771

1010.1327 Cement C + 0.139 BFS + −0.3442 Water W + −0.6836 S + 49.4202
20.1168 C + 0.046 * BFS + −0.1125 F + 2.5621 S + 0.0316 FA + −36.434
30.1517 C + 0.1011 BFS + 0.0631 F + −16.8066
4−0.0346 BFS + −0.0948 F + −0.6478 W + −1.3017 S + −0.154 CA + −0.124 FA + 414.4977
50.0776 C + 0.0914 BFS + −0.1966 W + 44.4496
60.1964 C + 0.1919 BFS + 0.1774 F + 0.9458 S + 0.087 CA + 0.0765 FA + −193.6016
7 0.0886 C + 0.0411 BFS + 0.0647 F + 0.8154 S + −1.3541
80.0283 C + −0.1769 F + 2.0944 S + −0.0505 CA + −0.0596 FA + 114.1096
90.117 C + 0.0578 BFS + 0.1119 F + −0.4979 W + 82.2298
10−0.1039 F + −0.4885 W + −0.0483 CA + −0.1583 FA + 297.2198