TECHNIQUES FOR MEASURING AIR VOID CHARACTERISTICS OF CONCRETE

THE CONSTRUCTION AND APPLICATION OF VARIOUS TYPES OF EQUIPMENT TO MEASUREMENT OF AIR VOID SYSTEM PARAMETERS OF HARDENED CONCRETE ARE DESCRIBED. SAMPLES WERE OBTAINED FROM EARLY NEW YORK STATE TEST ROADS, LABORATORY MIXTURES, AND OTHER SOURCES. WHILE THE VALUE OF MANY OF THESE DATA IS LARGELY HISTORICAL, THEY WERE THE BASIS UPON WHICH USEFUL CORRELATIONS AND TECHNIQUES WERE DEVELOPED. THE DATA INDICATED THAT BLENDS OF PORTLAND AND NATURAL CEMENTS PRODUCED CONCRETES WITH LEVELS OF AIR CONTENT AND SPACING FACTORS GENERALLY SUPERIOR TO THOSE OF PLAIN PORTLAND CEMENT WITHOUT AIR ENTRAINMENT. HOWEVER, THE OUTSTANDING DURABILITY OF MANY OF BOTH TYPES OF CONCRETE PAVEMENTS STUDIED COULD NOT BE ATTRIBUTED SOLELY TO PARAMETERS OF THE AIR VOID SYSTEM. TWO PIECES OF EQUIPMENT WERE CONSTRUCTED DURING THE COURSE OF THIS PROJECT -- A LINEAR TRAVERSE AND HIGH-PRESSURE AIR METER. OPERATING CHARACTERISTICS OF BOTH ARE DEFINED, AS WELL AS CORRELATIONS AMONG VARIOUS AIR VOID SYSTEM PARAMETERS MEASURED BY THE DIFFERENT METHODS. A TECHNIQUE FOR MEASURING COMPRESSIVE STRENGTH AND AIR CONTENT ON THE SAME SAMPLE OF HARDENED CONCRETE IS OUTLINED. /FHWA/

Media Info

  • Pagination: 40 p.
  • Serial:
    • Issue Number: 11

Subject/Index Terms

Filing Info

  • Accession Number: 00212130
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Final Report,, NYSDOT-ERD-73,, RR 11
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Nov 18 2003 12:00AM