7 Features of Asphalt

Asphalt has been an important ingredient in different commercial or residential roadway projects. The design requirements as well as the mix design methods play a crucial role for all asphalt concrete mixtures. The Department of Transportation who has the authority for the paving construction commonly is the one that establishes the mix design method and requirements.

After being established, the responsibility is passed on to the producer or contractor and his technicians to create a mix within the set standards and specification requirements similar to what asphalt paving Arlington are following. The following are the properties that asphalt concrete must have:

1.Durability

Durability is the asphalt’s ability to withstand factors such as changes caused by oxidation and polymerization, aggregates’ disintegrations, and the stripping of the binder films. These all can be caused by traffic, weather changes, and other environmental factors.

The asphalt mixture can be enhanced through these three procedures:

  • A dense gradation of aggregate that is stripping-resistant
  • Using maximum binder content
  • Compacting the asphalt mixture

2.Stability

Stability means the ability of the asphalt to resist rutting and shoving under heavy loads especially under traffic. This implies that the pavement made by the asphalt material could maintain its shape even under repeated loading.

The requirements are and the stability specifications depend on the expected traffic of the road and can be established after a very thorough traffic analysis.

3.Fatigue Resistance

This is the ability of the shape of the concrete to resist constant stress due to wheel loads. There has research that shows that binder viscosity air voids play a significant role in fatigue resistance. The fatigue resistance decreased when the percentage of air voids increases. Likewise, the same is also experienced when the pavement containing binder has hardened and aged.

4.Skid Resistance

This is feature allows the asphalt concrete to avoid accidents on the road. This is the ability of its surface to minimize slipping of vehicle tires especially when the surface is wet, which is also called skidding. The skid resistance is measured in the field at 40 miles per hour.

5.Workability

This is the easiness the paving mixture can be manipulated and compacted. This also refers to to its ability to be put and to a place; hence its installment. An asphalt with poor workability is not easy to use and could create problems when being put and installed.

6.Impermeability

This is the ability to resist the air and water that goes into the asphalt and is linked to the void content of the compacted mixture.

7.Flexibility

This is the ability of the asphalt concrete to resist changes even amid different movements in the sub-grade without cracking or changing its shape. It is one of the promising features of asphalt concrete. Dense-graded asphalt concrete with low binder content is less flexible than an open-graded asphalt concrete with high binder content.

Final thoughts

Not that you have learned the features that a good asphalt concrete needs to possess, it is time to assess of the asphalt concrete on the road has qualified to the standards.

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