REPORT ON PAVEMENT RESEARCH PROJECT IN INDIANA

THE LOCATION, DESIGN, MATERIALS, CONSTRUCTION, TRAFFIC, AND EARLY PERFORMANCE ARE DESCRIBED OF AN EXPERIMENTAL CONCRETE PAVEMENT BUILT IN INDIANA TO STUDY THE EFFECTIVENESS OF SUBBASES IN THE CONTROL OF PUMPING. THE PROJECT IS LOCATED ON US 41 IN THE NORTHWEST CORNER OF INDIANA, BEGINNING APPROXIMATELY 4.5 MILES SOUTH OF COOK AND TERMINATING AT THE SOUTH EDGE OF COOK. EXPERIMENTAL SECTIONS, WHICH HAVE A TOTAL NET LENGTH OF 4 MILES, SERVE AS THE SOUTHBOUND OR WEST PAVEMENT OF A DIVIDED HIGHWAY. EACH MILE OF THE CAREFULLY CONTROLLED TEST ROAD HAS EIGHT SUBBASE SECTIONS AS FOLLOWS: (1) TWO OF SOIL-CEMENT MIXTURES WITH THICKNESSES OF 3 AND 5 INCHES, (2) THREE OF OPEN-GRADED CRUSHED STONE, WITH THICKNESSES OF 3, 5, AND 8 INCHES, AND (3) THREE OF DENSE-GRADED CRUSHED STONE, WITH THICKNESSES OF 3, 5, AND 8 INCHES. THE NINTH SECTION IN EACH MILE WAS DESIGNATED AS A CONTROL SECTION WITH THE CONCRETE PAVEMENT PLACED DIRECTLY ON THE FINE-GRAINED SOIL. THE CONCRETE PAVEMENT HAS A 9-8-9-INCH THICKENED-EDGE SECTION AND IS 24 FEET WIDE. THE FIRST AND THIRD MILES HAVE PLAIN CONCRETE WITH CONTRACTION JOINTS SPACED 15 FEET. THE SECOND AND FOURTH MILES HAVE CONTRACTION JOINTS SPACED 40 FEET. THE SOILS IN THE UPPER 3 FEET OF THE SUBGRADE ARE IN THE A-6 AND A-7-6 GROUPS. THE SOILS IN THE UPPER 6 INCHES ARE PREDOMINATELY IN THE A-6 GROUP, WITH GROUP INDICES GREATER THAN 6. DETAILED TESTS WERE MADE TO CAREFULLY CONTROL ALL PHASES OF CONSTRUCTION. UNDISTURBED TRIAXIAL SPECIMENS WERE TAKEN FROM THE SUBGRADE JUST PRIOR TO PAVING. IN-PLACE CBR'S WERE RUN IN EACH SECTION ON BOTH THE SUBGRADE AND SUBBASE. THE PROJECT HAS 72 BOUYOUCOS MOISTURE ELECTRODES INSTALLED IN THE SUBGRADE AND SUBBASE AND 2,000 PRECISE LEVEL PLUGS IN THE CONCRETE PAVEMENT. PAVEMENT ROUGHNESS INDICES FOR EACH LANE OF EACH SECTION HAVE BEEN DETERMINED AT VARIOUS TIMES. DETAILED TRAFFIC STUDIES CLASSIFY VEHICLES BY TYPES AND WEIGHTS AND DETERMINE VARIATIONS IN TRAFFIC VOLUMES. A SPEED AND PLACEMENT STUDY OF TRUCKS WAS MADE IN 1950. THE PAVEMENT SECTIONS HAVING PLAIN CONCRETE, 15-FT JOINT SPACING, AND NO SUBBASE HAVE SHOWN DISTRESS DUE TO PUMPING. THERE HAS BEEN NO PUMPING OR EXTUSION OF MATERIAL IN THE SECTIONS HAVING OPEN-GRADED SUBBASE. /AUTHOR/

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  • Accession Number: 00206968
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Dec 9 1994 12:00AM