Asphalt 8 Error

[Ailene Goldhirsh]

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Pavement failure occurs when an asphalt surface no longer holds its original shape and develops material stress which causes issues. Pavement failure issues include cracking, potholes, depressions, rutting, shoving, upheavals, and ravelling.

Pavement failure is caused by a number of variables including, water intrusion, stress from heavy vehicles, expansion and contraction from seasonal temperature changes, and sun exposure. It is important to keep up with proper maintenance like crack and asphalt sealing to prevent cracks from spreading or forming.

Asphalt cracking by far makes up for the majority of pavement failure issues because of its tendency to spread and the wide variety of elements that can cause cracking. It is fairly normal for an asphalt surface to crack over time due to the settling of soil and the exposure to the outdoor elements, however, there are some less usual and common cracking issues that can form from improper mix design for pavement construction.

Alligator cracking forms when the subgrade and asphalt base begins to compress from bearing heavy vehicles. Alligator cracking is commonly found at intersections where vehicles are stopped for a continuous amount of time. Initial cracks will form and spread through water intrusion and further asphalt base compression.

Block cracking is formed by seasonal temperature differences that cause the asphalt to expand and contract. Block cracking will form if an asphalt surface has too rigid of a mix design that does not give the surface room for seasonal density changes.

Joint cracking forms along asphalt overlay projects where a flexible concrete base is paved over. Over time the concrete sub-base will expand and contract causing cracks to form along the joints of the concrete.

Potholes are formed through prolonged water intrusion from existing cracks in the surface. If alligator cracks and other asphalt stress cracks are not treated, water will begin to erode the surface all the way down to the sub base. This will cause large holes to form in the asphalt which will spread and cause damage to vehicles. Once a pothole is formed a patch can be applied to the surface, but because the sub base has been destroyed the area will continue to become compacted.

A depression in an asphalt surface is formed by uneven sub-bases or compactions over time. Depressions have a lower elevation than the asphalt surface which will cause the area to hold water for longer. Water buildup can cause further issues like raveling or potholes.

Rutting is channeled depressions in an asphalt surface that form over time from exceeded weight limits and improper base construction. Over time heavy vehicles will begin to compact the asphalt along a roadway creating tire ruts. If rutting forms in an asphalt surface the base must be repaired or restructured to account for heavier vehicle traffic.

Ravelling is caused by the continued intrusion of water and the degradation of an asphalt top coat. Once the top layer of asphalt bitumen wears down water and sunlight will continue to damage the asphalt surface causing the bond between asphalt bitumen and aggregate rock to break. Once ravelling occurs an asphalt surface will lose it impervious properties and will let water enter the surface. When water begins to intrude into an asphalt surface it will cause further cracks and pavement failure to occur.

If your road, parking lot, or asphalt surface is experiencing pavement failure, it is best to fix the issue before it worsens or spreads. At Lone Star Paving we offer a free on-site consultation where we can identify and come up with an action plan for asphalt pavement issues. If you suspect your asphalt surface is experiencing pavement failure, contact Lone Star Paving Today.

One of the most common asphalt shingle issues that contractors are called out to fix is blistering. This happens when moisture trapped within the shingle expands and pops/breaks through the surface and creates an exposed spot. Most of the time, blistering occurs during the high-temperature summer months.

There are many origins for blistering. One of which is when moisture makes its way into the shingle during the manufacturing process. For a little bit of background, shingles typically consist of three main layers: A fiberglass backing, a coating of asphalt, and then the granules on the top. If moisture somehow makes its way between any of these layers, the potential for blistering is higher.

For a little bit of background, the granules added to the top layer of a shingle are finely crushed stones or ceramic that have pigment (organic and in-organic types) applied to them. In addition to the color that granules provide, it also creates a protective barrier to prolong the life of the shingle roof.

All shingle roofs will experience some level of granule loss over time due to weathering and exposure. However, if a large number of granules are in your gutter or specific spots of your roof are missing significant granules, it could be several causes, including:

Most of the six common shingle roof problems discussed above can occur because of an installation error, especially if the roof is relatively new. You can also see that proper ventilation is a critical component of every roof, which is the responsibility of the contractor to do correctly.

Sheffield Metals is a leader in the distribution of coated and bare metal products, as well as engineered standing seam metal roof (SSMR) & wall systems. We specialize in providing painted Galvalume and aluminum for the architecturally driven metal panel industry. Sheffield Metals has the ability to meet a wide array of needs with more than 50 colors continuously stocked. We can also match virtually any custom color to suit any project.

Asphalt is most commonly used in the construction of highways, or for normal people driveways. It can be used in a lot of different applications but remains the same basic product. As such, asphalt mistakes are often made by those inexperienced at laying asphalt.

Whether you are working on a driveway or something else, it is almost important to remember grading. The slope of the driveway needs to be laid correctly, or else water could accumulate. Water will destroy asphalt over time, and without proper drainage, your asphalt drive is doomed.

Paving asphalt is not a race. If you apply the asphalt too quickly you will have problems down the line. Asphalt thickness and depth are important. Your drive may not cure fast enough, or you could experience cracking.

There are a lot of factors that go into asphalt compaction. Not compacting the asphalt properly can lead to ruts forming, or deformations in your asphalt. Research and learn how to properly use and compact asphalt.

Unless you have the proper training and experience with the equipment you will need to use, asphalt paving is very difficult. You can make an asphalt paving mistake without meaning to, and without even knowing what has happened.

Alligator cracking is a load associated structural failure. The failure can be due to weakness in the surface, base or sub grade; a surface or base that is too thin; poor drainage or the combination of all three. It often starts in the wheel path as longitudinal cracking and ends up as alligator cracking after severe distress.

Block cracks look like large interconnected rectangles (roughly). Block cracking is not load-associated, but generally caused by shrinkage of the asphalt pavement due to an inability of asphalt binder to expand and contract with temperature cycles. This can be because the mix was mixed and placed too dry; Fine aggregate mix with low penetration asphalt & absorptive aggregates; poor choice of asphalt binder in the mix design; or aging dried out asphalt.

FIX: Less severe cracks measuring 1/2 inch or less can be sealed to prevent moisture from entering into the sub grade. More severe cracks should be fixed by removing the cracked pavement layer and replacing it with an overlay.

Longitudinal cracking are cracks that are parallel to the pavements centerline or laydown direction. These can be a result of both pavement fatigue, reflective cracking, and/or poor joint construction. Joints are generally the least dense areas of a pavement.

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