<p>During the production of hot mix asphalt (HMA) in plants, dust is generated in the process of aggregate batching, heating, and mixing. Mobile-continuous-type asphalt plants typically employ dry bag houses or wet scrubbers for dust extraction, with the latter trapping dust and particulates from burnt fuel in water, forming mud cakes. In this paper, the main objective was to investigate the usability of this wet dust as a filler material in dense graded HMA. The waste filler particles were finer and rounder compared to the conventional filler. As the waste filler is the result of filtering dust and smoke, the presence of carbon in waste fillers was comparatively higher, which may be the possible reason for its dark colour. Several studies have shown that carbon fillers can improve mechanical properties of asphalt mixture. Residue from burnt fuel smoke, when captured in wet filler, may serve as a natural source of carbon modification. Marshall mix parameters, dynamic modulus, moisture susceptibility, rutting, and cracking resistance of mix with traditional crushed stone filler and mixes with the waste fillers were compared. Toxicity potential of the waste filler was also investigated. It was observed that the waste filler provided similar or better stiffness and resistance to permanent deformation, cracking and moisture damage, but resulted in reduction in dry indirect tensile strength. The results were found promising and showed that the waste filler generated through wet dust collector system in fuel run asphalt plant can be used as an alternative to conventional filler.</p>