If you have an asphalt driveway, carpark or workshop, you may see a variety of different cracks forming. For many people, a crack is just a crack. But if you know the difference between each of them, this might assist in understanding what type of repair work your asphalt needs. Saving you time and money. Here are some of the most common cracks seen in asphalt and what you may need to fix them.

Alligator Cracking

Alligator cracking take the shape of scales across your asphalt. It is often caused by a structural failure in the underlying base construction, which is caused from when the pavement was initially installed. The failure can be caused by a weakness in the original surface, a base layer that is too thin, or insufficient drainage. Cracks often begin appearing in the wheel path, before flaring out into the scale-like cracks.

How to fix: Because a structural failure is taking place the only possible solution to this type of crack is to investigate the base material and check the thickness of the asphalt. A repair method can then be arrived at and costed.

Alligator Crack in Asphalt

Alligator Cracking

Edge Cracks

Edge cracks, like the name suggests, are cracks that form around the edges of your asphalt, at varying widths from the edge. The main cause for these cracks can be poor drainage conditions above and below the surface, a lack of support around the side of the paving, heavy vegetation (tree roots etc) along the edge of the asphalt or even being in a high-volume traffic area with a low-volume pavement, can cause edge cracks to form and deepen.

How to fix: If the cracks are minor, one of the easiest ways to stop them from growing is to remove any vegetation that may be growing up and around the asphalt to fix any root damage issues. Any larger cracks may need cracksealing or even complete repair, resurfacing or replacement, depending on their size.

Edge crack in asphalt

Edge Cracks

Linear Cracking

Linear cracks are those that are parallel to the direction of the asphalt. These can be caused by several factors, these can be due to initial joint construction, general pavement fatigue/movement or having excessively heavy vehicles driving over or near the joint.

How to fix: Less severe cracks can be temporarily fixed by cracksealing the area. If a crack is particularly deep or is causing structural damage, the area will need to be removed in sections and replaced or patch repaired followed by a full resurface.

Linear crack in asphalt

Linear Cracking

Block Cracking

The last type of crack is the block crack. It is named as such due their shape, which are large interconnected rectangles. These types of cracks are not from excessive load, but from the basecourse and/or the asphalt being laid too thinly. Most commonly, these cracks occur when the asphalt ages and becomes more brittle.

How to fix: Less severe cracks can be temporarily fixed by cracksealing the area. If a crack is particularly deep or is causing structural damage, the area will need to be replaced (new base and/or asphalt).

Block Cracks in Asphalt

Block Cracking

No matter what type of cracks your asphalt may have, the experts at NK Asphalt are best suited to assessing the damage and providing you with the best long-term options. Contact one of our specialists today.