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The Trouble with Hot Mix Asphalt in Texas...

8/3/2017

 
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The trouble with Hot Mix Asphalt in Texas is an interesting one because there are several reasons that hot mix (and tar and chip) roads could fail. First off, the Dallas area, and North Texas in general, has had explosive growth. With that, heavy trucks traverse roads more frequently, bring in construction equipment, trailers, and heavy loads of all sorts. In an area with growth, more vehicles are present, adding to the wear and tear of the roads.

Generally, when there is asphalt that is cracking, the soil and base of the road could be to blame. A sturdy base is required in order to give the road longevity. Additionally, the soil is not as sandy as other regions, and with clay and dirt, the driveway or road can be more susceptible to heaving or moving over time.

The thickness of the asphalt does play a factor as well. Too thin, and the asphalt can break up over time. 

Compaction could be an issue as well. In cases where the base or asphalt is not compacted with a roller sufficiently, the material is more susceptible to breaking up, or causing other structural problems.

Beyond that, the weather can play a role as well. Heat and moisture wreck havoc on driveways and roads, eroding underneath, or allowing the asphalt to become more pliable with heat which could cause problems as well. 

Although hot all that common is driving on a driveway or road that is not cured. Turning on it in the first month for instance could pull the asphalt in front of the tire away from the asphalt on the back of the tire while turning.

The hot mix here is not always able to be applied without surface defects (cosmetic). Other areas in the country seem to have perfect asphalt that can be put down with perfect flatness and consistency, while here in Texas, most paving has some surface blemishes.

Key thoughts:
The road base under the pavement is important.
Keeping water as far away from the pavement will improve the lifespan of the asphalt.
Proper thickness and compaction are needed.
The weather in Texas, heavy loads, or a lot of traffic will take a toll.
Hot mix asphalt cure time is important.
There will very likely be blemishes in the overlay or top coat of asphalt.



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