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Open research questions in Asphalt Pavement Performance Evaluation

443 gap statements mined from Asphalt Pavement Performance Evaluation papers in our 7.9M-paper local library, which holds 3,598 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The need to consider the effects of all variables, including the structural components and the Pasternack rigid foundation, on the dynamic behavior of the runway pavement. The challenge of creating a realistic assessment of the pavement's performance under variable loads and environmental conditions.

    Dynamic response of JRCP rigid pavement under seismic loading via finite element modelling · 2026 · DOI

  • The lack of a comprehensive understanding of the relationships between asphalt concrete composition, internal structure, and macroscopic mechanical performance. The need for a more accurate and reliable method to predict the stiffness and micromechanical response of asphalt concrete.

    A calibrated-domain DEM–machine learning assessment of asphalt concrete stiffness and micromechanical response · 2026 · DOI

  • The lack of new uses for fly ash. The need for a cost-effective and permanent solution to remediate contaminated areas. The current standards for impermeable barrier elements have a significant carbon footprint.

    Use of Fly Ash Layer as a Barrier to Prevent Contamination of Rainwater by Contact with Hg-Contaminated Debris · 2025 · DOI

  • The need for standardizing production methods and addressing logistical hurdles. The lack of understanding of biochar's long-term stability in asphalt.

    Perspective on Sustainable Solutions for Mitigating Off-Gassing of Volatile Organic Compounds in Asphalt Composites · 2025 · DOI

  • There is a need to investigate the mechanical and volumetric properties of asphalt-concrete mixtures using walnut shell ash as a filler in various replacement ratios.

    Influence of Walnut Shell Ash and Limestone Filler in Hot Mix Asphalt · 2025 · DOI

  • There is a need for an optimized balance to maintain flexibility. Prior studies have not quantitatively correlated the dose-dependent response of PPA on rutting performance.

    Effects of Polyphosphoric Acid on Physical, Rheological, and Chemical Properties of Styrene-Butadiene-Styrene (SBS)-Modified Asphalt Binder · 2025 · DOI

  • The lack of a rational use of natural resources and waste recycling in the construction industry. The need for alternative mineral fillers that can replace natural carbonate filler. The potential of industrial by-products, such as fly ash, in pavements.

    Hydrophobic Fly Ash-Based Mineral Powder for Sustainable Asphalt Mixtures · 2025 · DOI

  • One challenge is the potential for settling of Nano CaCO3 particles over time, affecting binder homogeneity. Another challenge is the need to determine the optimal range of Nano CaCO3 and NHL dosages for maximizing benefits. The study also faces the challenge of evaluating the long-term sustainability of asphalt modified with these nanomaterials.

    Enhancing Asphalt Performance and Its Long-Term Sustainability with Nano Calcium Carbonate and Nano Hydrated Lime · 2024 · DOI

  • There is a lack of understanding of the comprehensive effects of Nano CaCO3 and NHL on diverse asphalt properties. The existing literature does not extensively explore the optimal range of Nano CaCO3 dosages. The paper identifies a gap in the understanding of the long-term sustainability of asphalt modified with these nanomaterials.

    Enhancing Asphalt Performance and Its Long-Term Sustainability with Nano Calcium Carbonate and Nano Hydrated Lime · 2024 · DOI

  • Need for sustainable solutions that meet performance requirements and demonstrate awareness of using non-renewable resources.

    Improving Asphalt Binder Durability Using Sustainable Materials: A Rheological and Chemical Analysis of Polymer-, Rubber-, and Epoxy-Modified Asphalt Binders · 2024 · DOI

  • Further research could investigate the application of deep learning models to other types of pavement. Future studies could explore the use of other machine learning algorithms for PCI prediction. Additional research could focus on developing more accurate models for pavement deterioration.

    Comparative Analysis of Asphalt Pavement Condition Prediction Models · 2024 · DOI

  • There is a need to explore alternative materials that enhance both performance and sustainability of asphalt pavements. The use of recycled materials contributes positively to a more sustainable approach to construction and reconstruction practices, but the effect of cement kiln dust on asphalt mixtures is not well understood.

    Effect of Cement Kiln Dust on the Mechanical and Durability Performance of Asphalt Composites · 2025 · DOI

  • Specifically, the diffusion efficiency of rejuvenators within the aged rubber–asphalt network is constrained, yet the governing mechanisms and selection criteria for effective rejuvenators remain unclear.

    Diffusion Mechanism and Efficiency of Rejuvenators with Distinct Molecular Characteristics in Aged Rubber-Modified Asphalt · 2026 · DOI

  • However, the quantitative relationships between CO2 emissions from highway maintenance schemes and factors such as pavement deterioration, traffic volume, and road grade remain unclear owing to a lack of comprehensive, multi-category, and real data.

    Characteristics of life-cycle carbon dioxide emissions of arterial highway maintenance and the influencing factors · 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 incorporation of PVC and SBS polymers is used to address the growing demand for durable and climate-resilient pavement materials.

    Assessment of Asphalt Mixtures Enhanced with Styrene–Butadiene–Styrene and Polyvinyl Chloride Through Rheological, Physical, Microscopic, and Workability Analyses · 2025 · DOI

  • Investigation into the fatigue characteristics of JRCP in the conditions of a runway that is subjected to the influence of vehicular forces and seismic loads, - Analysis of the interrelationship of various structural parts in motion by capturing dynamical properties of natural frequencies, mode shapes and damping…

    Dynamic response of JRCP rigid pavement under seismic loading via finite element modelling · 2026 · DOI

  • Demonstrating an ML surrogate trained solely on DEM microstructural descriptors, - Modeling permanent deformation and fatigue life with validated targets, - Exploring other machine learning models…

    A calibrated-domain DEM–machine learning assessment of asphalt concrete stiffness and micromechanical response · 2026 · DOI

  • Further research could be conducted to explore the use of fly ash in different climates, - Research could be done to determine the optimal thickness of the ash layer for different scenarios, - Studies could be conducted to compare the effectiveness of fly ash with other…

    Use of Fly Ash Layer as a Barrier to Prevent Contamination of Rainwater by Contact with Hg-Contaminated Debris · 2025 · DOI

  • Long-term durability of asphalt pavements using mining waste. Comprehensive environmental and economic Life-Cycle Assessments (LCA). Inherent variability of waste materials.

    Mining Waste in Asphalt Pavements: A Critical Review of Waste Rock and Tailings Applications · 2025 · DOI

  • Investigating the effects of other types of polymers or modifiers on asphalt mixtures. Studying the long-term performance of SBS and PVC modified asphalt mixtures. Examining the environmental impact of using polymer-modified asphalt. Developing new methods for optimizing binder formulations.

    Assessment of Asphalt Mixtures Enhanced with Styrene–Butadiene–Styrene and Polyvinyl Chloride Through Rheological, Physical, Microscopic, and Workability Analyses · 2025 · DOI

  • Further studies to evaluate the long-term performance of CKD in asphalt mixtures, - Investigation of potential improvements through additional material modifications, - Evaluation of the effect of CKD on the durability of asphalt…

    Effect of Cement Kiln Dust on the Mechanical and Durability Performance of Asphalt Composites · 2025 · DOI

  • Further field studies to validate the results under real-world conditions - Investigation of the long-term performance of the modified asphalt…

    Effects of Polyphosphoric Acid on Physical, Rheological, and Chemical Properties of Styrene-Butadiene-Styrene (SBS)-Modified Asphalt Binder · 2025 · DOI

  • Further study and adjustments to other requirements of the asphalt mixture, - Investigation of the suitability of the asphalt mixture at all…

    Influence of Walnut Shell Ash and Limestone Filler in Hot Mix Asphalt · 2025 · DOI

  • Additional quantitative confirmation of the increased micro-roughness and effective specific surface area is required, - Complementary compositional or surface energy measurements are needed to confirm the local compositional heterogeneity, - Further research is needed to fully understand the effects of using fly ash on the environmental impact of pavement…

    Hydrophobic Fly Ash-Based Mineral Powder for Sustainable Asphalt Mixtures · 2025 · DOI

Most-cited papers in Asphalt Pavement Performance Evaluation

Most recent work

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Open questions raised by papers listed on this page include: (1) The lack of a comprehensive understanding of the relationships between asphalt concrete composition, internal structure, and macroscopic mechanical performance (“A calibrated-domain DEM–machine learning assessment of asphalt concrete…”, 2026); (2) The diffusion efficiency of rejuvenators within the aged rubber–asphalt network is constrained, yet the governing mechanisms and selection criteria for effective rejuvenators remain unclear (“Diffusion Mechanism and Efficiency of Rejuvenators with Distinct Molecular…”, 2026); (3) There is a need for a predictive model that can accurately estimate the fatigue endurance limit of Hot Mix Asphalt (“Artificial Neural Network Model for Predicting Fatigue Endurance Limit of Hot…”, 2026); (4) The lack of understanding of biochar's long-term stability in asphalt (“Perspective on Sustainable Solutions for Mitigating Off-Gassing of Volatile…”, 2025); (5) There is a need to investigate the mechanical and volumetric properties of asphalt-concrete mixtures using walnut shell ash as a filler in various replacement ratios (“Influence of Walnut Shell Ash and Limestone Filler in Hot Mix Asphalt”, 2025). 443 gap statements have been mined from Asphalt Pavement Performance Evaluation papers in our 7.9M-paper local library, which holds 3,598 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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