The hot mix density used by the Road Materials Calculator is assumed to be 150 pounds per cubic foot.

• A. True
• B. False
• C. Not Specified
• D. It Varies by Mix

Answer: (A)

In estimating road materials, you convert volume to weight using density. The Road Materials Calculator adopts a fixed density for hot mix asphalt of 150 pounds per cubic foot. This value is a common, practical assumption because hot mix asphalt typically measures around 145–150 pcf once compacted, providing a straightforward, consistent way to estimate tons or truckloads from shown volumes. While actual density can vary with temperature, mix design, and compaction, using 150 pcf gives a reliable standard for calculation. For example, 1 cubic yard (27 ft3) of material would weigh 27 × 150 = 4,050 pounds, about 2.03 short tons, illustrating how density translates volume into weight for pricing and delivery planning.