Performance Evaluation of Asphalt Mixtures Containing Different Proportions of Alternative Materials

Abstract

With the increasing scarcity and cost of virgin materials for asphalt mixtures, the exploration of alternative components has intensified. Reclaimed asphalt pavement (RAP), crumb rubber (CR), steel slag (SS), and waste engine oil (WEO) have emerged as promising alternatives. Individually, RAP enhances rutting resistance but may compromise cracking tolerance; CR boosts cracking resistance; WEO affects cracking and rutting differently; and SS can influence moisture sensitivity. However, their combined impacts on asphalt performance, specifically on moisture damage, rutting, and cracking resistance, remain underexplored. In this study, 44 mixtures were assessed with varying RAP (0–75%), WEO (0–15%), and CR (0–15%) contents, alongside a constant SS aggregate (0% or 20%). The results indicate that specific combinations of these alternative materials can satisfy all performance thresholds for rutting, cracking, and moisture damage. To pinpoint ranges of optimal material contents for different high-traffic scenarios, prediction models were crafted using techniques like feed-forward neural network (FNN), generalized linear model (GLM), support vector regression (SVM), and Gaussian process regression (GPR). Among these, GPR demonstrated superior efficacy, effectively identifying regions of satisfactory performance.

A Comparative Study of the Effect of Moisture Susceptibility on Polyethylene Terephthalate–Modified Asphalt Mixes under Different Regulatory Procedures

“…The adhesiveness of an asphalt mixture is determined from the bond of the aggregate-binder system, and water damage can occur under two conditions: (a) when the asphalt binder loses adhesive properties, or cohesion occurs; (b) when the aggregate-binder adhesiveness is reduced. Both conditions result in stripping, which weakens the adhesion between the asphalt binder and the aggregate particles, thus affecting the chemical composition and their bond [22]. Therefore, the specific properties of these materials, as well as the properties of the mixture, significantly impact the performance of the asphalt pavement [23].…”

Technical, Economic, and Environmental Sustainability Assessment of Reclaimed Asphalt and Waste Polyethylene Terephthalate Pavements

“…Bekheda et al [13] also examined asphalt mixtures containing PET in varying percentages (3%, 5%, and 7%) and concluded that it improves the resistance of asphalt to permanent deformation. Also, according to Khorshidi et al's study, the mechanical characteristics of asphalt mixtures containing different proportions (0%, 2%, 4%, 6%, 8%, and 10%) of PET demonstrated enhanced properties, including increased stiffness, stability, and viscosity [14]. Moreover, adding polyethylene to asphalt modification improved resistance against fatigue and deformation.…”

Rheological Performance Analysis of Different Preventive Maintenance Materials in Porous High-Viscosity Asphalt Pavements

“…Asphalt drainage pavement is mainly composed of large voids and open-graded asphalt mixture, thus forming a spatial skeleton-void structure, which can provide greater compressive strength [11][12][13]. Due to the suspension of open-graded aggregates and the small contact position between the aggregates, ordinary asphalt struggles to provide an effective bonding effect, therefore requiring a high-viscosity modifier to increase the asphalt-bonding effect as well as the overall strength of the pavement [9,14].…”