Asphalt pavement specifications

Asphalt pavement specifications see the necessary guidelines to ensure paving projects, including residential driveways; roads and public recreational spaces meet the necessary standards for the weather. Specifications include traffic, foundation, drainage and thick asphalt.

Traffic

Specifications should consider traffic patterns. Asphalt pavement, structures must transfer and distribute the load of vehicle wheel support structure of the foundation. The plans must take into account the amount of traffic and wheel loads of vehicles. Usually, loads, consisting of passenger cars to the double coupled, ranging from 2,000 to 80,000 pounds.

Foundation

The aggregate base constitutes the basis for the project. Aggregates consist of a mixture of materials, such as sand, gravel, crushed rocks and other materials fillers. The base serves as a barrier of ice. Frost barrier keeps the asphalt surface rising due to ice, snow and cold of the winter season.

The foundation also serves as a solid surface that provides durable support for load bearing structure design for asphalt under a variety of conditions. The load bearing capacity for residential entries differs from the rules of support for road traffic. If the site already has a subgrade or a composition comprising a similar material to the gravel composition may be sufficient one to two inches of stone or recycled aggregates processed.

When working with soil, it may be required eight inches to 10 inches thick base. Contractors should consult the recommendations for the given area, including local Department of Transportation specification for asphalt paving. Material thickness must not exceed six inches thick, which allows the material to compact properly.

Sewer system

The presence of water can drain from beneath the floor, it weakens the structure. For asphalt surfaces drain properly, the base must have the right tone. More design criteria for residential and commercial projects demand a minimum range of two percent or two feet by 100 feet. Other specifications may require drainage installation sub-drains to drain water from the pavement structure.

Asphalt thickness

Asphalt projects to the size of small commercial projects require a packing density in the range of 90 to 95 percent. The final compact finish should be compared with no more than five times the size of the largest stone material used for mixing asphalt. The maximum size of stone ranging between 3/8 and ½ inch; therefore specifications allow maximum discharge the mixture of 2-½ inches, so when compacted, pavement compaction has a maximum thickness of two inches. If delivery or garbage trucks uses the structure of a thickness of 3-1 / 2 inch, consisting of two elevators – a layer folder two inches – and a top layer of 1-1 / 2 inches it is generally necessary. The ability to load some commercial structures requires greater thicknesses.