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What are Asphalt Paving Specifications?

What are Asphalt Paving Specifications?

Asphalt paving qualifications refer to the recommendations needed to guarantee paving projects, including residential driveways; public highways and recreational bike paths meet the standards needed for the climate. Specifications include foundation, drainage, traffic, and asphalt thickness.


The combined base makes up the foundation for the project. Aggregates involve of a mixture of materials, including gravel, crush rocks fillers, sand, and other materials. The base functions as a frost barrier. The frost barrier preserves the asphalt surface from mounting due to the snow, ice, and cold of the winter season.

The foundation also works as a solid surface that offers robust support for bearing the design load for the asphalt structure under a selection of conditions. The load bearing capacities for suburban driveways vary from the support standards for highway traffic.

If the site by now has a subgrade or a composition containing material with a gravel-like makeup, 1 to 2 inches of processed stone or reused aggregates may suffice. When working with soil, an 8 to 10 inches thick base may be necessary.

Contractors must consult the approvals for the given area, counting the local Department of Transportation condition for asphalt paving. The material’s thickness should not surpass a thickness of 6 inches, which lets the material to dense sufficiently.


The conditions must take into account the traffic patterns. Asphalt pavement constructions must transfer and allocate the wheel load of cars to the structure’s supporting foundation. The plans must take into attention the quantity of traffic and the wheel loads of the cars. Usually, loads, consisting of passenger vehicles to twin trailers, range beginning 2,000 to 80,000 pounds.

Asphalt Thickness

Asphalt plans up to the size of small marketable projects frequently require a compaction density in the 90 to 95 % range. The ultimate compact finish should associate to no more than 5 times the size of the biggest stone material used for the asphalt mix.

In New York and Connecticut, the full stone size varies between 3/8 inch & ½-inch; thus, the specifications permit for maximum poured mix of 2-½ inches, so that when compressed, the pavement has a maximum compressed thickness of 2 inches.

If garbage or delivery trucks use the structure a 3-1/2 inch thickness, comprising of 2 lifts or pouring — a binder layer of 2 inches and a top layer of 1-1/2 inches – is typically required. The load bearing capacity of certain commercial structures need greater thicknesses.


The existence of water, which may seep up from beneath the pavement, abates the structure. For asphalt surfaces to drain correctly, the base has to have the right pitch. Most project criteria for commercial and residential projects call for a least possible pitch of 2% or two feet for every 100 feet. Other drainage conditions may need the installation of sub drains to drain water away from the roadway structure.