Asphalt Durability
Asphalt Durability - 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...
01:15
Brick Durability, Strength, and Appearance
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2024
Brick durability, strength, and appearance are crucial factors in construction, influencing the choice of bricks for specific applications. The process of freeze-thaw, for instance, significantly affects brick durability. This phenomenon occurs when water absorbed by a brick expands as it freezes, potentially causing damage when it melts and refreezes. Bricks are graded for durability: SW-grade bricks are the most durable, offering high strength and low water absorption, followed by MW-grade...
07:15
A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
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2014
The durability of polymers and fiber-reinforced polymer composites in service is a critical aspect for their designs and condition-based maintenance. We present a novel low-cost laboratory testing platform for the investigation of the influence of concurrent mechanical and environmental loadings, and may help design more efficient yet safer composite structures.
08:52
Method to Produce Durable Pellets at Lower Energy Consumption Using High Moisture Corn Stover and a Corn Starch Binder in a Flat Die Pellet Mill
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Cited by 50 •
2016
In this study, a protocol was developed to produce good quality pellets using a flat die pellet mill at reduced specific energy consumption testing high-moisture corn stover and a starch based binder. The results indicated that adding a corn starch binder improved the pellet durability, reduced percent fines and decreased specific energy consumption.
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.
FAQs
Oxidation gradually stiffens the asphalt binder, which can reduce its ability to accommodate pavement movement and increase the likelihood of cracking. This aging mechanism is therefore central to durability assessment, especially when engineers interpret changes in surface condition over time. Evaluating oxidation alongside traffic and environmental exposure helps identify whether loss of flexibility is contributing to observed pavement deterioration.
Air voids influence how asphalt mixtures respond to moisture and temperature, making them an important design variable rather than a minor physical detail. Along with binder and aggregate interactions, void structure affects the mixture’s exposure to environmental conditions and its ability to retain performance. Engineers consider these relationships when seeking resistance to water damage without creating an unfavorable balance of stiffness and flexibility.
Rutting and cracking represent different durability concerns and can emerge under different stresses. Repeated loading and heat can promote rutting, or permanent deformation, whereas oxidation can stiffen the binder and promote cracking. Because improving resistance to one form of distress can affect flexibility or stiffness, mixture design aims for a balance rather than maximizing a single property.
Assessment combines laboratory testing, field monitoring, and mixture-design evaluation. Laboratory work examines how a selected mixture performs under relevant durability concerns, while field monitoring tracks surface and structural changes during service. Engineers then use the combined evidence to judge whether binder, aggregate, air-void, moisture, and temperature-related factors are supporting performance or contributing to deterioration.
When designing a durable pavement, engineers adjust the mixture as an integrated system rather than considering binder alone. The binder, mineral aggregates, and air voids must be evaluated together under expected traffic, weather, and environmental exposure. The design objective is to retain sufficient stiffness for load resistance while preserving enough flexibility to limit cracking and addressing susceptibility to water damage.
Durability information helps engineers compare pavement options and plan maintenance around expected performance loss. A mixture that better resists oxidation, repeated loading, heat, and moisture-related damage can maintain structural performance and surface quality longer. The practical outcome is a longer service life, fewer maintenance needs, and more reliable, cost-effective transportation infrastructure.