Use of Fly Ash and High-Strength Reinforcing Bars in Military Construction.

摘要

This report presents the results of an investigation to evaluate fly ash and high-strength reinforcing bars (Grade 60 and above) as alternate construction materials to alleviate the impact of material shortages on military construction. The evaluation was based on the effect of these materials on cost and resource (raw material and energy) intensity of military construction. The results show that the use of fly ash is economically feasible for 78 percent of all military installations in the United States. The resulting average savings per cubic yard of concrete would be 73 lb (43 kg/cu m) of cement and 2.72 X 10 to the 5th power Btu (3.75 X 10 to the 8th power J/cu m). This translates into a monetary savings of $0.87/cu yd ($1.14 cu m) and an energy savings sufficient to heat the average home in Illinois for 14 hours. Use of Grade 80 and Grade 60 high-strength reinforcing bars in place of the more conventional Grade 40 reinforcing bars can result in maximum material savings of 41 and 25 percent and a corresponding cost savings of 24 and 15 percent, respectively.