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Asphalt Rubber is a blend of asphalt cement, ground tire rubber and other additives that have been reacted in hot asphalt so that the rubber particles swell. The resulting rubber modified binder is then mixed with aggregate and laid down to form a very durable road surface. The resulting rubber modified Pavement has many properties that perform together to make a longer lasting, quieter and safer roadway when compared to many other conventional pavements.
There are many diverse benefits associated with asphalt rubber. It can be applied to reduce thickness. In the age of conservation of natural resources and recycling, the reduced thickness of Asphalt Rubber can save on the amount of aggregate required to resurface a road. That means less material will be mined from diminishing reserves and transported to the job site. Another benefit is the reduction of traffic noise. International studies have shown that Asphalt Rubber pavements can reduce traffic noise up to 85% in some cases. Generally, Asphalt Rubber will provide a 50% reduction in noise.
The chemicals contained in the rubber retard the aging and oxidation of the asphalt preventing it from becoming brittle and cracking. Because of the flexibility of rubber in asphalt, Asphalt Rubber resists and reduces cracking. Cracks allow water and pressure to act on sub-surfaces which creates pot-holes and deterioration of the road surface.
Traffic noise studies have been conducted on all types of pavement surfaces. Asphalt Rubber has been proven to reduce the decibel level substantially as much as 85% when compared to concrete. A significant factor in traffic noise is the "grooves" cut in concrete to add traction and the joints and seems between concrete slabs. Tires make less noise on Asphalt Rubber because these "grooves" are not necessary.
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