Science AI Journal
Engineering · Research topic

Open research questions in Asphalt Pavement Performance Evaluation

134 unresolved questions extracted from the limitations and future-work sections of 812 Asphalt Pavement Performance Evaluation papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • developing targeted additives to inhibit chloride erosion processes, - using DFT methods to identify the sites that are most affected by Cl-and/or OH-ions

    Investigation of bitumen chloride erosion process mechanism at the molecular level · 2026 · DOI

  • Lack of understanding of the salt erosion process. Limited research on the inhibition of chloride erosion processes. Need for a detailed description of the chloride erosion process at the molecular level.

    Investigation of bitumen chloride erosion process mechanism at the molecular level · 2026 · DOI

  • Multiple recycling is an emerging strategy to maximize the use of reclaimed asphalt pavement (RAP), yet the evolution of binder performance during repeated rejuvenation and the feasible recycling limit remain unclear.

    Study on the multiple recycling limit of asphalt binders containing high RAP content based on chemical and rheological properties · 2025 · DOI

  • Although the macroscale properties of bitumen ageing and rejuvenation have been well documented, the microscale mechanisms are still not well understood.

    Atomic force microscopy (AFM) based microstructural and micromechanical analysis of bitumen during ageing and rejuvenation · 2025 · DOI

  • Although numerous studies have confirmed their importance in pavement design and performance prediction, a systematic review of empirical relationships and scientific knowledge is lacking, resulting in insufficient integration and application of current findings.

    A Systematic Evaluation of the Empirical Relationships Between the Resilient Modulus and Permanent Deformation of Pavement Materials · 2025 · DOI

  • Future research should focus on optimizing bitumen content, conducting fatigue and aging tests, and validating field performance under real traffic and environmental conditions to ensure long-term durability and compliance with road specifications.

    Incorporating Recycled Textile Fibers into Stone Mastic Asphalt · 2025 · DOI

  • However, a comprehensive understanding of the three-phase interface interaction mechanism among graphene, SBS, and bitumen remains unclear.

    Molecular Interfacial Interaction Mechanism between Graphene–SBS and Bitumen Components · 2025 · DOI

  • Despite its prevalent use, the specific contribution of the polymer in these processes remains insufficiently understood.

    An analytical framework to assess the chemical changes in polymer-modified bitumen upon natural and simulated ageing · 2024 · DOI

  • To address this gap in knowledge, we developed an analytical framework to precisely determine the chemistry of SBS-modified bitumen.

    An analytical framework to assess the chemical changes in polymer-modified bitumen upon natural and simulated ageing · 2024 · DOI

  • However, exploration on their recyclability potential at the end of its service life remains scarce.

    Recyclability potential of waste plastic-modified asphalt concrete with consideration to its environmental impact · 2024 · DOI

  • This dual approach fills a significant gap in the literature by offering a more efficient method and prediction model for optimizing pavement materials amidst climate change , while also promising to significantly advance pavement technology by enhancing material design and performance.

    Optimizing modified asphalt binder performance at high and intermediate temperatures using experimental and machine learning approaches · 2024 · DOI

  • However, the molecular processes that initiate material deterioration are still poorly explored.

    Photo-induced ageing processes in bitumen · 2024 · DOI

  • This paper concludes by highlighting the challenges in developing standardized test equipment and evaluation criteria, the limitations of organic modifiers, and the need for further research on nanomaterials to improve asphalt’s UV aging resistance.

    A Holistic View of Asphalt Binder Aging under Ultraviolet Conditions: Chemical, Structural, and Rheological Characterization · 2024 · DOI

  • Limited studies have been conducted on large-scale rubber modification in asphalt mixtures.

    Experimental Study on Dynamic Modulus of High Content Rubber Asphalt Mixture · 2024 · DOI

  • Currently, there is limited research on the utilization of spent coffee grounds (SCG) in asphalt pavement.

    Regenerative and Innovative Utilization of Coffee Residue and Waste Cooking Oil: Improving Rheological Properties of Recycled Asphalt · 2024 · DOI

  • However, there has been limited research into the comprehensive exploration of using plastic waste in porous asphalt pavement, an ecologically sustainable and safer form of pavement.

    Recycling of plastic waste in porous asphalt pavement: Engineering, environmental, and economic implications · 2024 · DOI

  • So far, the underlying mechanisms of how moisture infiltrates into the mixture and results in binder stripping remain controversial and scarcely investigated.

    Moisture damage mechanism of asphalt mixtures containing reclaimed asphalt pavement binder: A novel molecular dynamics study · 2024 · DOI

  • Nevertheless, future investigations should focus on optimization of the bitumen formulation, along with examination of other sustainable moieties for the sake of commercialization of the developed binders in pavement construction.

    Eco-friendly modification of bitumen: The effects of rubber wastes and castor oil on the microstructure, processability and properties · 2024 · DOI

  • There is a need for a predictive model that can accurately estimate the fatigue endurance limit of Hot Mix Asphalt. Traditional regression models have limitations in predicting fatigue endurance limit strain values.

    Artificial Neural Network Model for Predicting Fatigue Endurance Limit of Hot Mix Asphalt Using Uniaxial Tension–Compression Tests · 2026 · DOI

  • The specific input parameters (mix design variables, binder properties, loading frequencies, temperature ranges) used to train the ANN model are not enumerated in the excerpt, making it impossible to determine whether the model can predict fatigue endurance limits across the full range of realistic field conditions or only within narrow laboratory testing parameters.

    Artificial Neural Network Model for Predicting Fatigue Endurance Limit of Hot Mix Asphalt Using Uniaxial Tension–Compression Tests · 2026 · DOI

  • One of the major problems faced by the pavement industry is the rapid and enormous increase in the number of vehicles on the roads, which has caused increased stresses on the pavement directly causing the deterioration of roads due to increased deformations and fatigue.

    Investigation of the Impact of Waste Engine Oil and Coconut Fiber on the Physical Characteristics of Bitumen · 2026 · DOI

  • Even though this research shows positive outcomes using WEO and CF as a modifier for bitumen grade 60/70, it is important to evaluate its other characteristics thoroughly so that it can be used widely to a larger extent.

    Investigation of the Impact of Waste Engine Oil and Coconut Fiber on the Physical Characteristics of Bitumen · 2026 · DOI

  • The growing demands placed on asphalt pavements. The lack of understanding of the physicochemical mechanisms of GO modification in asphalt concrete. The need for more durable and sustainable highway systems.

    Experimental analysis of the structural and functional performance of asphalt concrete modified with graphene oxide · 2026 · DOI

  • The disconnect between nanomaterial chemistry and practical civil engineering. The lack of understanding of the physicochemical mechanisms of GO modification in asphalt concrete.

    Experimental analysis of the structural and functional performance of asphalt concrete modified with graphene oxide · 2026 · DOI

  • Future research can investigate the long-term effects of using PEO and PPO regenerants on aged asphalt. Future research can explore the use of other types of regenerants for restoring the performance of aged asphalt. Future research can study the economic and environmental benefits of using PEO and PPO regenerants for recycling aged asphalt.

    The Rheological Properties of Recycled Asphalt With Pyrolysis Oil From Waste Plastics · 2026 · DOI

Most-cited papers in Asphalt Pavement Performance Evaluation

Most recent work

Find a gap in your own Asphalt Pavement Performance Evaluation sub-topic

This page shows what the Asphalt Pavement Performance Evaluation literature already flags as unresolved. To narrow it to your specific question, run the guided finder — it searches the gap library on demand and checks candidates against 250M+ OpenAlex works.

Open the Research Gap Finder →

Related topics in Engineering

Human auditory perception and evaluation
604 open questions
Urban Design and Spatial Analysis
486 open questions
Spatial Cognition and Navigation
441 open questions
Traffic and Road Safety
412 open questions
Concrete and Cement Materials Research
299 open questions
Digital Transformation in Industry
287 open questions
Advanced Sensor and Energy Harvesting Materials
283 open questions
Perovskite Materials and Applications
267 open questions
134 open questions have been extracted from the limitations and future-work passages of 812 Asphalt Pavement Performance Evaluation papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

Tools for your next paper

Gaps & Literature SearchFind open questions in any field — 120,000+ open gaps mined from our own library.Pre-CheckIs your paper ready? A Tier 1–5 acceptance probability in seconds.Journal FinderA ranked shortlist of target journals from a 17,500-venue index.Duplicate Publication CheckerCheck prior-publication & salami-slicing risk across 8 sources.Citation GeneratorFreeA DOI or title → APA, MLA, Vancouver, Chicago, BibTeX, RIS. No signup.Graphical Abstract MakerFreeTurn your findings into a colorblind-safe graphical abstract.

Compare the category — Honest roundups of the AI research tools, ours listed alongside the alternatives.

Command palette

Jump anywhere, run any action.