Quality One

Pavement cracks. It happens and it can't be avoided. You can, however, avoid costly repairs and premature pavement deterioration by fixing cracks and other minor problems as they occur. Here are some of the basics when it comes to pavement cracks

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Mother Nature is powerful; the extreme polarities of weather take their toll on all pavement. Water is one of the biggest direct factors in pavement deterioration. When water gets into the pavement subgrade, during winter months or other extrememly cold periods, it freezes, expands and causes pavement to crack. When left unrepaired, water also causes the subgrade base to become unstable and prematurely deteriorate beyond repair.

So how does water get inside pavement in the first place? Overall deterioration due to road salts, heavy trucks, oil spots and sunlight are major factors. While water will directly cause cracks, the other factors are what allow water to penetrate through the surface layer in the first place. Sunlight dries out the tar in pavement, allowing small areas for water to seep through. This is why routine crack filling and sealcoating of pavement keeps it in the best possible condition.

Crack sealing is used as a first defense against pavement deterioration because it offers several important benefits.  Effective crack sealing keeps water from entering and weakening the base or sub-base.  It helps preserve the pavement adjacent to the cracks; prevents sand, stone, and dirt from making its way into open cracks causing compressive stresses; and extends pavement life by minimizing crack growth.

Proper attention to cracks will prevent problems from spreading and double the life of the pavement.  Pavement repair in the early stages of deterioration will pay big dividends later by delaying costly resurfacing.

Why choose Quality One?

We use a wide band crack filling machine. This means there's about an inch of rubber on each side of the crack ensuring it is properly filled. Other companies will only try and fill the inside of the crack as shown below.

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Below are the different kinds of cracks and commonly asked questions. There are several different kinds of cracks and it is important to know which kind you have. Click on the pictures below for more information.

Joint


Reflective

Reflective crack

Block

Slippage

Slippage Crack

Alligator

Alligator Crack

Edge

Edge Crack

Joint

Pavement "joints" are created during initial construction when the edges of two pavement mats are placed next to one another. These constructed joints usually have a lower density of asphalt than that of the surrounding pavement. If the mats don't bond properly (for a variety of reasons), joint cracks appear.

Reflective

This type of crack appears primarily in resurfacing projects, although it can also occur in a new pavement. It happens when an existing crack or joint in the underlying pavement structure reflects upward through the surface.

Block

Visually, this type of cracking forms a square pattern, with cracks intersecting each other at nearly right angles. A common cause of this on parking lots is lack of traffic, (steady traffic constantly kneads the pavement and keeps it flexible). Other causes include excessive air voids, low-penetration asphalt, or an overly high plant mix temperature.

Slippage

Slippage cracks are usually crescent-shaped and caused by heavy traffic that is stopping, turning, or climbing a hill. Resultant stresses cause a bond failure between the upper and lower pavement layers. The open end of the U-shaped crack always points in the direction of the applied force.

Alligator

Over time, a flexible asphalt pavement becomes more rigid and is less able to tolerate vertical deflections. This causes tension in the pavement and results in alligator-type cracking. Such cracking can also occur from structural inadequacy, aging, and oxidation.

It is generally recommended that alligator areas be removed and replaced rather than filled or sealed.

Edge

Unlike the previous types, edge cracks appear only parallel to and within 18 inches of the edge of the pavement. Causes include poor base, lack of shoulder support, poor drainage, or frost action.

 

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    Joint crack Reflective crack Block crack Slippage crack Alligator crack Edge crack