EXPERIMENTAL BITUMINOUS CONCRETE PAVEMENTS, I-84, SOUTHBURY- MIDDLEBURY, I-95, GROTON

THE PRESENT REPORT COMBINES UNDER ONE COVER ADDITIONAL PERFORMANCE TESTS AND ANALYSES UNDERTAKEN ON TWO PREVIOUS PROJECTS. PERFORMANCE OF THE SEVEN SECTIONS IN EACH PROJECT, VARYING IN PAVEMENT STRUCTURE THICKNESSES RANGING FROM 18 TO 23-1/2 INCHES, IS EVALUATED ON THE BASIS OF CRACKING, RUTTING, ROUGHNESS, REBOUND DEFLECTION UNDER LOAD, DENSITY, AND TRAFFIC DATA. THE INTENDED PURPOSE, OF COMPARING THE PERFORMANCE AND SERVICEABILITY OF EACH TEST SECTION WITH THOSE OF SIMILAR DESIGN IN THE AASHO ROAD TEST, COULD NOT BE FULFILLED BECAUSE OF EXCESSIVE VARIATIONS FROM THE DESIGN OF THE BITUMINOUS CONCRETE COURSES. DUE TO A CHANGE FROM THE SAND-FILLED STONE AND PENETRATED BASE COURSES TO A PREMIXED BITUMINOUS BASE IN THE STATE'S DESIGN POLICY, THE APPLICATION OF THIS WORK WILL BE QUITE LIMITED. /FHWA/