Abstract:
With the rapid growth of Phoenix, islands of nonpaved streets causing dust and bottlenecks developed. Property owners adjacent to these low-volume streets were not willing to pay for the cost of construction. Alternate pavement designs were developed that use asphalt rubber on a variety of bases. Asphalt rubber at a rate of 0.50 gal/sq yd (2.3 cu dm/sq m) and then crushed stone chip are applied directly on native soil, soil cement, crushed aggregate, soil cement-asphaltic concrete, old asphaltic concrete, or old portland cement concrete. Asphalt rubber has given the pavement increased serviceability over the variable types of bases. This type of construction has thus far provided as many as 8 maintenance-free years; the existing surfaces would otherwise have required major reconstruction. The asphalt rubber has given the low-cost, low-volume streets an added pavement life that is still being measured.
Supplemental Notes:
Proceedings of a work shop held June 16-19, 1975, in Boise, Idaho by the Transportation Research Board.
