EFFECT OF DEGREE OF SYNTHETIC LIGHTWEIGHT AGGREGATE PRE- WETTING ON THE FREEZE-THAW DURABILITY OF LIGHTWEIGHT CONCRETE

THE SCOPE OF THIS RESEARCH STUDY WAS TO EXTEND THE KNOWLEDGE GAINED FROM PREVIOUS STUDIES ON THE DURABILITY OF STRUCTURAL LIGHTWEIGHT CONCRETE, AND TO ATTEMPT TO CORRELATE DEGREE OF PRE-WETTING OF THE SYNTHETIC LIGHTWEIGHT COARSE AGGREGATE, TYPE OF SYNTHETIC LIGHTWEIGHT COARSE AGGREGATE, COMPRESSIVE STRENGTH OF LIGHTWEIGHT CONCRETE AND THE FREEZE- THAW DURABILITY OF LIGHTWEIGHT CONCRETES MADE WITH THESE AGGREGATES. CONCRETE SPECIMENS MADE WITH SELECTED SYNTHETIC COARSE LIGHTWEIGHT AGGREGATES WERE SUBJECTED TO FREEZING IN AIR AND THAWING IN WATER. AN ANALYSIS OF THE DATA INDICATES THAT RESULTS WERE OBTAINED ON THE EFFECTS OF ALL THE VARIABLES INCLUDED IN THIS INVESTIGATION AND THE FOLLOWING TENTATIVE CONCLUSIONS WERE SUGGESTED. THE DEGREE OF AGGREGATE PRE-WETTING HAS A DEFINITE EFFECT ON THE FREEZE- THAW DURABILITY OF THE CONCRETES TESTED. ALL THE THREE AGGREGATES TESTED HAVE MORE OR LESS SIMILAR EFFECTS ON THE FREEZE-THAW DURABILITY OF THE RESULTING CONCRETES. A TREND IS REVEALED INDICATING THAT WHEN THE TOTAL WATER ABSORBED IN THE AGGREGATE IN TERMS OF PERCENT ABSOLUTE VOID VOLUME EXCEEDS AROUND 85 TO 90 PERCENT, THE RESULTING CONCRETE FAILS RAPIDLY UNDER THE TYPE OF FREEZE-THAW TESTS EMPLOYED IN THIS STUDY. THE HYDRAULIC PRESSURE CONCEPT MAY NOT ALWAYS PROVIDE THE FULL EXPLANATION FOR DISRUPTIVE ACTION FROM FREEZING AND THAWING. /AUTHOR/

  • Supplemental Notes:
    • Research RePORT 81-2, 20 PP
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011
  • Authors:
    • Kanabar, C N
    • Ledbetter, W B
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00212382
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 1 1994 12:00AM