THE CAMERA LUCIDA METHOD FOR MEASURING AIR VOIDS IN HARDENED CONCRETE

THE CAMERA LUCIDA METHOD IS FOR THE DETERMINATION OF THE AIR CONTENT AND THE AIR VOID CHARACTERISTICS OF HARDENED CEMENT PASTES, MORTARS AND CONCRETES IS DESCRIBED. A COMPARISON IS MADE OF THE VOID CONCENTRATION AND AVERAGE VOID AREAS OF THE AIR ENTRAINED BY DIFFERENT TYPES OF AGENTS AND UNDER DIFFERENT MIXING CONDITIONS. NO FACTORS SIGNIFICANTLY ALTERING THE VOID CHARACTERISTICS IN CONCRETE AND REVEALED IN THE TESTS THUS FAR MADE. THE AIR CONTENTS OF HARDENED CONCRETES AS DETERMINED BY THE CAMERA LUCIDA METHOD COMPARE SATISFACTORILY WITH RESULTS OBTAINED BY OTHER METHODS APPLIED TO THE SAME CONCRETES WHEN IN THE PLASTIC STATE. /PCA/

• Authors:
  • Verbeck, G J
• Publication Date: 0

Media Info

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

Subject/Index Terms

• TRT Terms: Air content; Air entraining agents; Air voids; Concrete hardening; Concrete mixing; Measurement; Mortar; Pastes; Polymer concrete
• Uncontrolled Terms: Hardened concrete
• Old TRIS Terms: Air voids content
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213468
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 15
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM