Grading and New Paving

New Paving is the application of new hot asphalt applied to either native soil or rock base material. Thickness of the asphalt section or the size of the rock used will change depending on how much weight and traffic the surface will be subject to. The asphalt may be paved in multiple lifts as well to be sure the proper compaction is reached.

It is very common to place a section of base material under new asphalt; base material, or more accurately, rock base, is a very frequently used mixture of rock and sand, which is able to attain a high rate of compaction. The utilization of base material provides a strong underpinning to the new asphalt being placed. Heavy traffic areas will destroy new asphalt if it is not on strong base material at the time of the installation.

Finally, grading of the base material is required. Grading is the movement of dirt or base material to achieve the proper elevations prior to paving. Grading is necessary to smooth and compact the finish surface in order to be ready to receive asphalt which will mirror the grade as it has been left.

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It is important to mention that in most Reserve Studies, the removal and replacement of the asphalt is calculated with the life of the asphalt being 25 – 30 years depending on the original design. It is also important to note that most Reserve Studies base the life of the asphalt on doing preventative seal coating and other repairs as required in order to preserve the asphalt in the best way possible. Read More.