DEVELOPMENT AND STUDY OF APPARATUS AND METHODS FOR THE DETERMINATION OF THE AIR CONTENT OF FRESH CONCRETE

NEW APPARATUS AND METHODS DEVELOPED FOR THE DETERMINATION OF THE AIR CONTENT OF FRESH CONCRETE ARE DESCRIBED. THE TEST METHODS DEVELOPED ARE BASED ON TWO DIFFERENT PRINCIPLES, (1) DIRECT VOLUMETRIC METHOD AND (2) PRESSURE METHOD. EXTENSIVE TESTS SHOW GOOD CORRELATION BETWEEN THE TWO METHODS FOR CONCRETE MIXES REPRESENTING A WIDE RANGE IN CEMENT CONTENT, CONSISTENCY, NATURAL COARSE AGGREGATE, AND METHOD OF INCORPORATING THE AIR-ENTRAINING AGENT. GOOD CORRELATION HAS ALSO BEEN OBTAINED IN TESTS CONDUCTED AT FOUR TEMPERATURE LEVELS (44, 62, 79, AND 100 F). BOTH LABORATORY AND FIELD EXPERIENCE WITH DIFFERENT METHODS INDICATE THAT THE PRESSURE METHOD IS PROBABLY THE MOST PRACTICAL FOR FIELD TESTS. /PCA/

• Authors:
  • Menzel, C A
• 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; Cement content; Concrete; Consistency; Instruments for measuring loads or pressure; Measurement; Natural aggregates; Polymer concrete; Pressure; Temperature; Test procedures; Volumetric analysis
• Old TRIS Terms: Concrete consistency; Pressure measurement
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213469
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 16
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM