Fig. 3.
(a) Control mix (RS4.75A) 0% SFM with rut depth of 3.0 mm; (b) mix with 0.25% SFM with rut depth of 2.9 mm; (c) mix with 1.0% SFM with rut depth of 2.1 mm; and (d) mix with 1.5% SFM with rut depth of 0.9 mm.
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