ResearchArticle Potential Use of Volcanic Ash as Filler Material in Hot Mix Asphalt Basha Fayissa , Achalu Kebede , and Fekadu Fufa Faculty of Civil and Environmental Engineering, Jimma University, Jimma, Ethiopia Correspondence should be addressed to Basha Fayissa; bashafayisa@gmail.com Received 9 July 2022; Revised 19 November 2022; Accepted 2 December 2022; Published 15 December 2022 Academic Editor: Nikhil Saboo Copyright © 2022 Basha Fayissa et al. Tis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Road construction often focuses on the use of conventional materials. Due to the depletion of these conventional materials, this cannot be always true. To overcome such problems, several alternative construction materials have been proposed as sustainable solutions. Tus, this study has investigated the potential use of volcanic ash (VA) as an alternative fller material in hot mix asphalt. Te investigation has used laboratory scale and purposive sampling method for sample collection. Te plastic index and specifc gravity of volcano ash are 0.92% and 2.44, respectively. Te chemical composition analysis indicated that VA is a class•N pozzolana material. Maximum stability of 11.38 kN was obtained at full replacement of volcano ash. Te tensile strength ratio of the mix at full replacement of CSD and volcanic ash is 82% and 98%, respectively. From the fatigue resistance analysis, the probable failure of pavement constructed with the mixture containing VA could be improved from 16600 to 14400. Due to its rough surface, VA has better bonding ability with bitumen compared to CSD. Te mix prepared from VA has less deformation tendency than that prepared from CSD. 1. Introduction To attain high quality and extended service life, the de• mands of hot mix asphalt (HMA) for high thermal stability, low•thermal crack resistance, and water stability have been steadily growing with the fast growth of the economy, science, and technology [1]. Numerous additives, including both organic and inert, were utilized in bitumen mixes to address these issues [2–4]. Organic additives have several drawbacks, including high cost, sophisticated operation, and challenging manufacturing procedures, all of which limited their application [5]. Inert additives were viewed as mineral fllers, which had an impact on their distribution in bitumen and the reactivity at the fller•asphalt interface. In reality, inert additives might increase the bondage between bitumen and aggregates, which would enhance the quality of the bitumen binder [6, 7]. Furthermore, the modifed bitumen containing inert components possessed properties like simple manufacturing method, cheap cost, and su• perior quality, all of which are in line with China’s spec• ifcations [8]. Fly ash and limestone dust were commonly employed in roadway construction as typical inorganic materials. Despite limestone being the most often used material in road construction, studies have indicated that it is only available as mineral fller in bitumen [9, 10]. Franesqui et al. [11] discovered that asphalt rubber compositions comprising high•porosity marginal volcano pebbles had stronger resistance to moisture susceptibility. Due to the complicated terrain and high porosity of volcanic ash, Liu et al. [12] discovered that a solid packing•SBS•binder system generated inside mastic might further improve the mechanical characteristics of styrene•butadiene•styrene (SBS) improved mixes. Liu et al. [13] investigated four types of mixes with nano•scale VA mineral fllers, demonstrating that the form of the sustainable cyclical strain graph is free from loading magnitude and particle structure. Te authors in [14, 15] studied the road performance of VA asphalt glue and found that natural VA could greatly increase the superior thermal resistance of asphalt mixtures and the low•thermal resistance of bituminous glue. Hindawi Advances in Civil Engineering Volume 2022, Article ID 8486774, 8 pages https://doi.org/10.1155/2022/8486774