Recycling Portland Cement Concrete and Asphaltic Concrete by George Calvert, 1977

(1977) Recycling Portland Cement Concrete and Asphaltic Concrete by George Calvert, 1977. Transportation, Department of

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Abstract

The Iowa Department of Transportation has found itself in the same position as other highway construction agencies in that we are facing shortages of many of our road building materials. The shortages that are the most costly, are related to gasoline, fuel oil and other fuel products. Great quantities of fuel are consumed in the smelting and refining of steel. Large quantities of fuel are us ed to manufacture cement. The asphalt in the asphaltic concrete is a fuel in itself with a very high BTU value. The Iowa Department of Transportation is making every effort to devise ways of conserving fuel. We also recognize that we have shortages of other materials just as costly and just as difficult to solve, the before, we are working on the shortage problem associated with aggregate at the same time that we are working on the fuel shortage. In many cases they are one and the same.