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2. Rubberized asphalt - Wikipedia

   en.wikipedia.org/wiki/Rubberized_asphalt

   Rubberized asphalt concrete (RAC), also known as asphalt rubber or just rubberized asphalt, is noise reducing pavement material that consists of regular asphalt concrete mixed with crumb rubber made from recycled tires. Asphalt rubber is the largest single market for ground rubber in the United States, consuming an estimated 220,000,000 pounds ...

3. Granular base equivalency - Wikipedia

   en.wikipedia.org/wiki/Granular_base_equivalency

   GBE translates the thickness of different road layers to a number using a set of coefficients. So, to calculate the GBE, the depth of each layer should be multiplied by the granular equivalency factor for the material in that layer. In the next step the sum of the converted layer thicknesses is calculated. [2]

4. Crumb rubber - Wikipedia

   en.wikipedia.org/wiki/Crumb_rubber

   Rubberized asphalt is the largest market for crumb rubber in the United States, consuming an estimated 220 million pounds (100 kt), or approximately 12 million tires annually. [2] Crumb rubber is also used as ground cover under playground equipment, and as a surface material for running tracks and athletic fields.

5. Road surface - Wikipedia

   en.wikipedia.org/wiki/Road_surface

   In the mid-1960s, rubberized asphalt was used for the first time, mixing crumb rubber from used tires with asphalt. [20] While a potential use for tires that would otherwise fill landfills and present a fire hazard, rubberized asphalt has shown greater incidence of wear in freeze-thaw cycles in temperate zones because of the non-homogeneous ...

6. Subbase (pavement) - Wikipedia

   en.wikipedia.org/wiki/Subbase_(pavement)

   In the UK, the specification for aggregate used as a subbase in the construction of driveways and roads includes MOT Type 1 Stone. The thickness of subbase can range from 75 to 100 mm (3 to 4 in) for garden paths through 100 to 150 mm (4 to 6 in) for driveways and public footpaths, to 150 to 225 mm (6 to 9 in) for heavy used roads, and more for ...

7. Chipseal - Wikipedia

   en.wikipedia.org/wiki/Chipseal

   Chipseals are constructed by evenly distributing a thin base of hot tar, bitumen or asphalt onto an existing pavement and then embedding finely graded aggregate into it. The aggregate is evenly distributed over the hot seal spray, then rolled into the bitumen using heavy rubber tired rollers creating a paved surface.