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Exploring the efficacy of sawdust ash as a mineral filler substitute for the production of asphalt mixtures

Sukhija, Mayank; Al-ani, Aliaa F.; Mohammad, Hussein K.; Albayati, Amjad; Wang, Yu


Mayank Sukhija

Aliaa F. Al-ani

Hussein K. Mohammad

Amjad Albayati


Many waste materials can be repurposed effectively within asphalt concrete to enhance the performance and sustainability of pavement. One of these waste materials is sawdust ash (SDA). This study explores the beneficial use of SDA as a substitute for limestone dust (LD) mineral filler in asphalt concrete. The replacement rate was 0%, 15%, 30%, 45%, and 60% by weight of total mineral filler. Scanning electron microscopy (SEM) was employed to assess the surface morphology of Sawdust (SD), SDA, and LD. In addition, a series of tests, including Marshall stability and flow, indirect tensile strength, moisture susceptibility, and repeated uniaxial loading tests, were conducted to examine the performance characteristics of asphalt mixtures of different SDA content. As per Marshall mix design, a slightly higher binder content was required for the preparation of
SDA mixes. The results reveal that the asphalt mixtures prepared using SDA attain a tensile strength ratio (TSR) greater than the critical threshold, i.e., 80%, indicating the feasibility of SDA against moisture-induced damage. The highest TSR value of 87% was obtained using 45% SDA as a replacement for LD. Compared to 0% SDA, there is a reduction of 12.08% in permanent deformation for asphalt mixtures produced with 60% SDA. Also, as the SDA content increases, there is a slight improvement in the resilient modulus values, with a peak improvement of 3% at 60% SDA. In addition, the cost of producing SDA mixes was relatively lower than the control mixes, indicating the cost-effectiveness of using SDA. Overall, the study found that SDA is a promising material that can improve the performance and durability of asphalt concrete at lower production costs.


Sukhija, M., Al-ani, A. F., Mohammad, H. K., Albayati, A., & Wang, Y. (2024). Exploring the efficacy of sawdust ash as a mineral filler substitute for the production of asphalt mixtures. Materials and Structures, 57(5),

Journal Article Type Article
Acceptance Date Jun 10, 2024
Online Publication Date Jun 14, 2024
Publication Date 2024-06
Deposit Date Jun 15, 2024
Publicly Available Date Jun 15, 2025
Journal Materials and Structures
Print ISSN 1359-5997
Electronic ISSN 1871-6873
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 57
Issue 5