Global Journal of Human-Social Science, B: Geography, Environmental Science and Disaster Management, Volume 22 Issue 3

CBR 12,8 15,0 35,0 15,4 25,0 17,0 21,0 15,2 30,0 16,0 27,5 29,0 23,0 Exp. 0,05 0,00 0,15 0,60 0,00 0,00 0,05 0,10 0,00 0,20 0,00 0,20 0,00 MR medium 416 394 865 477 425 667 557 394 507 611 487 478 689 K1TC 222 144 200 175 153 164 231 214 519 345 222 359 227 K2TC -0,24 -0,33 -0,48 -0,32 -0,33 -0,49 -0,28 -0,2 0,01 -0,19 -0,25 -0,09 -0,34 K1TD 205 144 246 171 146 177 227 197 405 327 202 297 243 K2TD -0,33 -0,41 -0,52 -0,42 -0,44 -0,60 -0,36 -0,29 -0,09 -0,26 -0,36 -0,20 -0,41 K1MC 354 282 289 295 263 168 384 342 650 462 403 483 341 K2MC 0,33 0,32 0,03 0,25 0,35 0,02 0,29 0,30 0,34 0,21 0,39 0,35 0,14 K3MC -0,51 -0,53 -0,50 -0,52 -0,62 -0,64 -0,51 -0,43 -0,32 -0,39 -0,55 -0,43 -0,47 ε p 6,52 6,59 2,93 7,19 1,63 6,66 4,18 3,63 0,78 3,37 3,15 1,30 6,40 Ψ 1 0,21 0,28 0,13 0,46 0,07 0,02 0,03 0,01 0,08 0,10 0,04 0,09 0,47 Ψ 2 -0,45 0,79 0,25 -0,51 0,07 -2,31 -1,86 -1,22 0,04 0,17 -0,53 -0,27 1,09 Ψ 3 1,73 1,30 1,24 1,30 0,07 3,90 2,98 3,96 0,91 1,42 2,39 1,07 0,95 Ψ 4 0,06 0,06 0,06 0,05 0,07 0,05 0,06 0,08 0,05 0,07 0,06 0,05 0,05 pH H2O 4,7 4,9 4,9 4,8 4,6 4,6 4,4 4,6 4,6 4,5 4,4 4,8 4,7 pH KCl 4,0 4,1 4,0 3,9 3,9 4,0 4,1 4,1 4,0 3,9 4,0 4,0 4,0 Δ pH -0,7 -0,8 -0,9 -0,9 -0,7 -0,6 -0,3 -0,5 -0,6 -0,6 -0,4 -0,8 -0,7 M.O. 7,59 7,12 3,85 5,53 5,11 4,37 4,32 7,19 5,68 6,25 6,67 5,94 4,43 CEC 4,63 4,55 2,80 3,55 3,75 3,85 3,84 4,40 5,42 5,74 4,46 4,07 4,64 S 36,6 28,4 43,4 61,5 79,1 54,3 41,4 53,2 73,1 69,0 56,6 86,3 55,5 V 25,1 30,6 28,9 19,4 8,8 17,9 17,7 13,4 7,2 9,4 10,3 3,9 15,7 In the TRB classification, three samples were classified as A-4 (non-plastic silt soils to moderately plastic), seven as A-6 (plastic clay soils), one (soil 11) as A-7-5 (PI moderate in relation to LL, and may be elastic and subject to high volume variation) and two (02 and 10) as A-7-6 (high PI in relation to LL and are subject to extremely high volume changes). According to the TRB classification, all soils of the research would present poor to bad behavior as a subbed layer of pavements, however, considering the results of the Resilient Modulus (MR) and Permanent Deformation (PD) trials, the studied soils present excellent behaviors regarding these aspects, evidencing that fine-grained tropical soils present peculiar behavior, as noted in several works already mentioned. Regarding the MCT classification, it is verified that in general, the samples further north of the metropolitan region of Recife present clayey behavior, except for sample 03 (fine sandy soil), moving to a more sandy behavior when collected in the south region (except for sample 12). It is observed that the coefficient d', which is associated with the inclination of the dry branch of the Mini-MCV compaction curve (in MCT), presents important variation between the samples, indicating different behaviors. Villibor and Nogami (2009) specify that d' values above 20 indicate soils of lateritic behavior and above 100 (very high) refers to the typical behavior of fine clayey sands. It is noted that most of the samples evaluated present these characteristics in this aspect and also granulometric and mineralogical. Regarding Mass Loss by Immersion (PMI wo ), the values obtained for specimens (CP) molded in optimum moisture were 0% to almost 50% of the soils, even after 24 hours of immersion. The e' index, which associates the MLI and the coefficient d', reflects the lateritic or non- lateritic behavior of the analyzed soil. Soils with low mass loss and high d' values result in lower values of e' and more evident lateritic behavior: 02, 05, 06, 08 to 13. As for the values of c', which is associated with the slope of the soil deformability curve, it is understood that the higher the value of c', the more deformable the soil is, since there are steeper reductions in the CP height as the blows are applied in the Mini-MCV compaction test. Thus, the soil with the highest deformability was soil 01 (c' = 2.0) indicating the behavior of a clay soil (c'>1.5 according to Nogami and Villibor (2009)), and soil 09 presented the lowest c' value showing typical behavior of non-plastic sands and silts (c'<1.0, according to Nogami and Villibor (2009)). In the permanent deformation tests, soil 09 showed the lowest deformation and soil 01 was the most notable deformation. Regarding granulometry, we stress that other parameters associated with granulometry were also considered, but deleted from the table in order to optimize the presentation of the data. The variables in this case were: % of total sand, % of passing material in sieve no. 10, % of material retained in sieve no. 10 and percentage of passing material in no. 200. All soils presented appreciable content of clay (between 32.28% and 50.17%) and fine sand (between Volume XXII Issue III Version I 16 ( ) Global Journal of Human Social Science - Year 2022 © 2022 Global Journals B Clustering of Fine-Grained Tropical Soils using Data Science Tools Applied to their Geotechnical Properties