Asphalt Pavements
Asphalt Pavements - Related Videos
10:10
Aggregates for Concrete and Asphaltic Mixes
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Concrete and asphalt are by far the most common construction materials used today. Concrete is a composite material consisting of cement, water, air, coarse aggregate, and fine aggregates. Fine aggregates are typically sands and coarse aggregates are natural or crushed rocks. Chemical admixtures to modify certain specific properties are also commonly used (i.e., superplasticizers to make the...
01:28
Design Example: Joints in Concrete Pavements
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2025
Concrete pavement joints are essential for maintaining the structural integrity and longevity of pavement by controlling where and how the pavement cracks. These joints can be categorized based on their functions, such as contraction or control joints, construction joints, isolation joints, and expansion joints. Contraction joints are typically formed by sawing a groove into the concrete shortly after it has hardened. This creates a weakened vertical plane, deliberately encouraging cracking at...
12:21
Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall
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2023
Here, we present a method for determining the friction coefficient of pavements with different ice thicknesses indoors. The complete procedure includes the preparation of the equipment, the calculation and analysis of the snowfall, equipment calibration, friction coefficient determination, and data analysis.
08:03
Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight
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Cited by 11 •
2022
Graphene-modified asphalt nanocomposite has shown an advanced self-healing ability compared to pure asphalt. In this protocol, molecular dynamics simulations have been applied in order to understand the role of graphene in the self-healing process and to explore the self-healing mechanism of asphalt components from the atomistic level.
07:30
A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
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Cited by 8 •
2017
Using an anthropometric head and neck, optical fiber-based fit force transducers, an array of head acceleration and neck force/moment transducers, and a dual high speed camera system, we present a test bed to study helmet retention and effects on biomechanical measures of head and neck injury secondary to head impact.
FAQs
Temperature changes influence the asphalt mixture because it behaves as a viscoelastic material, meaning its response combines time-dependent flow with elastic deformation. Repeated wheel loading interacts with these temperature-sensitive properties, affecting how effectively the pavement carries traffic. Engineers therefore consider temperature alongside loading conditions when evaluating durability, flexibility, and susceptibility to performance problems.
Compacted base and subbase layers help distribute wheel loads through the pavement structure rather than concentrating them at the surface. Their contribution allows the roadway system to support traffic while balancing strength and flexibility. Engineers consider this layered load distribution when designing pavement thickness, assessing performance, and determining how the system may respond to repeated loading.
Repeated traffic loading, temperature, and moisture are central conditions influencing pavement performance. Because the mixture responds viscoelastically, its behavior changes as these conditions interact with the layered structure and drainage characteristics. Engineers evaluate them when seeking resistance to cracking or rutting, since improving one performance requirement may need to be balanced against flexibility, strength, or moisture management.
Evaluation combines materials testing, pavement modeling, and life-cycle assessment. Materials testing examines relevant mixture and structural behavior, while modeling helps represent how the layered system responds to traffic and environmental conditions. Life-cycle evaluation extends the analysis to service life, maintenance planning, cost efficiency, and sustainability, giving engineers a broader basis for comparing design choices.
Engineers first balance requirements such as strength, flexibility, drainage, and resistance to cracking or rutting. They then use materials testing and pavement modeling to assess expected behavior, followed by life-cycle evaluation to consider service life, maintenance needs, and cost efficiency. This workflow supports decisions throughout design, construction, assessment, and long-term transportation infrastructure management.
These systems serve highways, streets, airport runways, and other transportation infrastructure where smooth, durable, traffic-bearing surfaces are required. Engineering analysis supports decisions about structural performance, environmental response, maintenance planning, and service life. Applying testing, modeling, and life-cycle evaluation helps organizations manage roadway networks while considering cost efficiency and sustainability alongside operational demands.