Analysis of response of steel slag and lime modified asphalt mixtures using Kenlayer
Author Identifier (ORCID)
Abstract
Accurate prediction of pavement structural responses (deflections, strains, and stresses) is necessary as part of the mechanistic-empirical design approach for pavements. It is essential to know the horizontal strain at the base of the asphalt layer, the vertical strain at the top of the subgrade layer, and the deflection at the top of the asphalt layer to calculate the pavement’s design life. Therefore, this study investigates the deflection and strains of steel slag and lime on the modified asphalt layer mixtures. A single pavement cross-section consisting of the surfacing (steel slag and lime-modified asphalt mixtures), base course, sub-base course, and sub-grade was considered for the deflection and strain analysis. The widely used KENLAYER program was used as the analysis tool to compute critical pavement structural responses. The horizontal strain, vertical strain, and surface deflection from the results of the KENLAYER analysis were 1.43-1.44 × 10−4, 4.48-4.62 × 10−4, and 0.4732-0.4854 mm, respectively. Also, it was found that the critical failure of the steel slag and lime-modified mixture will be caused by rutting. The parameters of the asphalt layer were assumed to be linear when calculating the deflection and strains on the flexible pavement, so future research should consider incorporating, the viscoelastic properties of the asphalt layer.
Keywords
fatigue, lime, pavement structural responses, rutting, steel slag
Document Type
Book Chapter
Date of Publication
1-1-2026
Publication Title
Airfield and Highway Pavements 2026
Publisher
American Society of Civil Engineers
School
School of Engineering
ISBN
[9780784487037]
Copyright
subscription content
Content Type
Metadata only
First Page
255
Last Page
264
Recommended Citation
Daniel, O. O., Olumide, O. M., & Oluwasegun, A. O. (2026). Analysis of response of steel slag and lime modified asphalt mixtures using Kenlayer. In Airfield and Highway Pavements 2026 (pp. 255-264). American Society of Civil Engineers. https://doi.org/10.1061/9780784487037.023