AIR CONTENT OF HARDENED CONCRETE BY A HIGH-PRESSURE METHOD

PORTABLE EQUIPMENT OF SPECIAL DESIGN IS DESCRIBED FOR THE DETERMINATION OF AIR CONTENT OF HARDENED CONCRETE BY A HIGH- PRESSURE METHOD. AIR CONTENTS DETERMINED WITH THIS APPARATUS, THE LINEAR TRAVERSE METHOD (ASTM C 457), AND THE PRESSURE METHOD (ASTM C 231) ARE COMPARED. CONCRETES TESTED COVERED A RANGE OF AIR CONTENTS UP TO 13% AND A VARIETY OF MIX DESIGNS. SPECIMEN SIZES INCLUDED 6 X 12-IN., 4 X 8-IN., AND 3 X 6-IN. CYLINDERS. RESULTS INDICATE THAT THE HIGH-PRESSURE METHOD PROVIDES REASONABLY GOOD DATA ON AIR CONTENTS WHEN COMPARED WITH RESULTS OBTAINED BY ASTM C 231. HOWEVER, WHEN COMPARED WITH THE LINEAR TRAVERSE METHOD THE RESULTS WERE COMPARABLE ONLY UP TO ABOUT 5% AIR CONTENT. /PCA/

• Authors:
  • Erlin, B
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Air content; Concrete hardening; Measuring instruments; Pressure
• Uncontrolled Terms: Hardened concrete; High pressure
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213589
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 149
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM