Hot mix asphalt (HMA) is commonly used in the construction of roadways in the United States at
Question:
Hot mix asphalt (HMA) is commonly used in the construction of roadways in the United States at a rate estimated to be 500,000,000 tons/year. A typical upper layer (there may be as many as 5 layers of different thicknesses and compositions) of a high-volume highway is composed of crushed stone (also known as crushed aggregate) and asphalt binder and is approximately 1.25 inches thick. The stone, which has a specific gravity of about 2.7, is mixed with asphalt binder (SG = 1.03) to form the HMA with a composition of approximately 95 wt% aggregate and 5% asphalt. What is the volume (ft3) of asphalt binder and weight (tons) of HMA required for the top layer of a 15-mile segment of interstate highway with 5 lanes, each of which has a width of 12 ft?
Step by Step Answer:
Elementary Principles of Chemical Processes
ISBN: 978-1119498759
4th edition
Authors: Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard