EVALUATION OF SHRINKAGE-CRACIHNG CHARACTERISTICS OF STRUCTURAL LIGHTWEIGH'f CONCRETE by R. G. McKeen Research Assistant Texas Transportation Institute and W. B. Ledbetter Associate Research Engineer Texas Transportation Institute Research Report 81-11 Synthetic Aggregate Research Research Study 2-8-65-81 Sponsored by The Texas Highway Department in cooperation with the U. S. Department of Transportation Federal Highway Administration Bureau of Public Roads October, 1969 TEXAS TRANSPORTATION INSTITUTE Texas A&M University College Station, Texas