PERFORMANCE OF CONCRETE PAVEMENTS AS RELATED TO SUBBASE CONSTRUCTION METHODS

FIELD STUDIES OF THE PERFORMANCE OF CONCRETE PAVEMENTS BUILT ON SUBBASES OF VARIOUS DESIGNS AND MATERIALS SHOW THAT THE METHOD OF SUBBASE CONSTRUCTION IS AN IMPORTANT FACTOR. UNIFORMITY OF GRADATION WAS FOUND TO BE THE ONE SUBBASE QUALITY HAVING THE MOST INFLUENCE ON PAVEMENT PERFORMANCE. SUBBASE MATERIALS HAVING A SMALL MAXIMUM SIZE WERE FOUND GENERALLY TO PERFORM BETTER THAN COARSER MATERIALS BECAUSE SEGREGATION IS LESS LIKELY TO OCCUR DURING PLACEMENT. INFORMATION WAS OBTAINED DURING THE CONSTRUCTION OF 28 PROJECTS IN MANY PARTS OF THE COUNTRY REPRESENTING TYPICAL SUBBASE CONSTRUCTION METHODS. THE EFFECTS ON SUBBASE DENSITY AND GRADATION OF VARIOUS CONSTRUCTION OPERATIONS ARE DISCUSSED. THESE INCLUDE METHODS OF SUBGRADE COMPACTION, SUBBASE MIXING, PLACEMENT AND COMPACTION, AND FINE-GRADING. HEAVY CONSTRUCTION TRAFFIC ON THE COMPLETED SUBBASE NULLIFIES THE EFFORTS EXPENDED TO OBTAIN UNIFORMITY AND RESULTS IN SUBSTANDARD PAVEMENT PERFORMANCE. /AUTHOR/

Media Info

  • Monograph Title: Concrete pavement: subbase and joint construction
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00206949
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 9 1994 12:00AM