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CAD model (left) showing (a) load arm, (b) brush holders, (c1, c2) material block and holding case, (d1, d2) rotating case, (e1, e2) gearbox and motor, (f) adjustable rollers, (g) control box; the mean compaction (h) dolerite soil, height 7.30 ± 0.19 mm, width 13.17 ± 0.06 mm; (i) weathered granite soil, height 7.93 ± 0.19 mm, width 12.96 ± 0.06 mm; and Fabricated apparatus (right).
