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mardi 12 août 2014

How Seal Coating Preserves The Quality Of Asphaltic Pavements

By Tanisha Berg


When you notice your drives are fading, you should make sure you apply sealants. The seal coating procedure will help restore the color of driveways. The drying and fading of blacktop is accompanied by hardening of paving material. With time, when you have laid down your driveways, they will begin to harden on the outermost layer. The blacktop is made up of binders, which harden due to constant exposure to ultraviolet rays.

The baking by sunlight will render the surfaces inflexible meaning they are not able to expand or contract as desired. A hardened driveway blacktop will start showing cracks. When you use sealcoats, they improve the flexibility of your blacktop. It is able to expand when it is heated by sun radiation and contract in times of cold weather.

When you use a sealant product, you restore the beautiful black color of pavements. You also improve the flexibility of driveways and they can expand as well as constrict due to changes in temperature. To prevent cracking, asphalt pavements should be able to expand when they are exposed to heat and constrict when it is cold.

In the freeze thaw cycles, the frozen water will melt down and leave voids within the sub base. The blacktop collapses and fills the empty spaces. One way in which you can prevent water from entering sub base of asphaltic pavements is to apply sealants. Snow is also damaging to pavements. It may cause the binders to weaken and after the winter, you may experience problems like cracks and potholes.

With the heavy weight from vehicles, you may have sections of road developing depressions. The same water can remain trapped inside and during winter, it freezes and expands. The expanding frozen water will enlarge cracks. As the freeze-thaw cycle ends, the frozen water will melt down and leave empty cracks under blacktop.

If your driveways are located in areas with trees, they are shaded meaning that UV light does not degrade the sealcoats fast. Before applying sealcoating products, you need to make sure all defects are restored. When you put the sealant on top of cracks, they will only mask the problems. Within a short time, the crack will open up as the sealants wears out.

It is therefore, important to repairs the cracks, potholes, and other forms of defects before you apply sealants. The contractors you choose to sealcoat driveways, they should be qualified, and use the right products. There are many coating products in the market and if you do not use quality sealants, you may spend a lot of money.

With regular inspection, you are able to know the right time to coat pavements using sealants. Sealcoats will also prevent water from infiltrating the sub base and loosening the material underneath blacktop surface. Water is an element that is as destructive as the UV light. The water entering the sub grade layer is likely to freeze inside and expand. Freezing water will widen cracks as it expands and when it melts, it leaves behind spaces that make the blacktop to crumble.




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