A REPORT ON DURABILITY STUDIES OF STRUCTURAL LIGHTWEIGHT CONCRETE

INVESTIGATIONS WERE MADE OF THE DURABILITY OF VARIOUS STRUCTURAL LIGHTWEIGHT CONCRETES MADE WITH AGGREGATES MANUFACTURED IN TEXAS AND TO DETERMINE IF A SUITABLE, QUICK CONCRETE DURABILITY TEST COULD BE DEVELOPED. TESTS FOR DURABILITY WERE MADE ON 3X4X16-INCH OR 4X4X11-INCH PRISMS PREPARED WITH LIGHTWEIGHT AGGREGATES FROM FIVE SOURCES AND NORMAL WEIGHT AGGREGATE FROM ONE SOURCE. SOME OF THE VARIABLES WERE' REPLACEMENT OF VARIOUS PERCENTAGES OF THE LIGHTWEIGHT FINES BY NATURAL SAND, SLUMP CEMENT FACTOR, DEGREE OF SATURATION OF THE AGGREGATE AND DEGREE OF DRYING OF CONCRETE PRIOR TO FREEZING AND THAWING. THE DURABILITY TESTS USED WERE FREEZING AND THAWING IN WATER /SLOW CYCLE/, FREEZING AND THAWING IN BRINE, MODIFIED SULFATE SOUNDNESS, HEATING-DRYING COUPLED WITH COOLING-WETTING, AND CONTINUOUS STORAGE IN AIR. THE PRINCIPAL TENTATIVE CONCLUSIONS WERE' 1/ WHEN SUBJECTED TO FREEZING AND THAWING IN WATER, NONE OF THE LIGHWEIGHT CONCRETES SHOWED SIGNS OF DISINTEGRATION, BUT THEY DISINTEGRATED IN LESS THAN 25 CYCLES WHEN EXPOSED TO FREEZING AND THAWING IN BRINE, 2/ SATURATING THE COARSE AGGREGATE WAS DETRIMENTAL TO CONCRETE FROZEN IN WATER OR IN BRINE, 3/ THE USE OF NATURAL SAND WAS BENEFICIAL TO THE DURABILITY OF THE CONCRETE, 4/ HEATING AND COOLING AND LITLE EFFECT ON DURABILITY, 5/ LABORATORY FREEZE-THAW TEST YIELDED THE BEST RESULTS, 6/ THE MODIFIED SULFATE SOUNDNESS TEST USED TO INDICATE DURABILITY OF LIGHTWEIGHT AGGREGATE CONCRETE WAS NOT SATISFACTORY, AND 7/ BEHAVIOR DIFFERENCES WERE FOUND IN CONCRETES MADE WITH DIFFERENT LIGHTWEIGHT AGGREGATES, BUT NO DEFINITE RELATIONSHIP WAS FOUND BETWEEN AGGREGATE AND DURABILITY.

  • Supplemental Notes:
    • State No. 35, AUG64
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  USA  76011
  • Authors:
    • Hirsch, T J
    • Ledbetter, W B
    • Ivey, D L
  • Publication Date: 1964-8

Subject/Index Terms

Filing Info

  • Accession Number: 00211968
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 1 1994 12:00AM