WEATHERING TESTS ON CONCRETE

RESULTS OF TESTS TO DETERMINE THE EFFECT OF AMOUNT OF MIXING WATER AND TYPE OF COARSE AGGREGATE ON THE DURABILITY OF CONCRETE WERE PRESENTED. THE CONCRETES WERE DESIGNED WITH THREE WATER-CEMENT RATIOS, 0.65, 0.85, AND 1.10 BY VOLUME, EACH WITH TWO SLUMPS OF 2 AND 7 INCHES. FOUR WIDELY DIFFERING CRUSHED LIMESTONES WERE USED AS COARSE AGGREGATES. ALTERNATE FREEZING AND THAWING WAS USED AS A WEATHERING TEST BOTH ON THE CONCRETE AND ON SAMPLES OF CRUSHED LIMESTONE. IN ADDITION, THE CRUSHED ROCK WAS GIVEN 5 AND 10 CYCLES OF A SLIGHTLY MODIFIED A. S. T. M. SOUNDNESS TEST WITH SODIUM SULFATE. THE SPECIMENS OF CONCRETE WERE 4 BY 6 BY 18 INCH BEAMS AND 6 BY 12 INCH CYLINDERS. INDICATIONS FROM THE TESTS ARE, IN PART: WEATHERING RESISTANCE OF THE CONCRETE DECREASED WITH INCREASE IN WATER-CEMENT RATIO AND INCREASED WITH ADDITIONAL LENGTH OF CURING PERIOD. THE QUALITY OF THE COARSE AGGREGATE WAS DIRECTLY REFLECTED IN THE RESISTANCE TO FREEZING AND THAWING OF THE CONCRETE. FREEZING AND THAWING TESTS AND THE SODIUM SULFATE TEST ON THE LIMESTONES GRADED THE ROCKS IN THE SAME RELATIVE ORDER OF DURABILITY, 25 AND 100 CYCLES OF FREEZING AND THAWING BEING ROUGHLY DUPLICATED RESPECTIVELY BY 5 AND 10 CYCLES OF THE SODIUM SULFATE TEST. /AUTHOR/

  • Supplemental Notes:
    • Vol 13, ParT I, PP 303 - 329, 10 FIG, 7 TAB
  • Authors:
    • Hanson, L O
    • Goldbeck, A T
  • Publication Date: 1934

Media Info

  • Monograph Title: Proceedings of the Thirteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 7-8, 1933. Part I: Reports of Research Committees and Papers
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00213764
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 6 1971 12:00AM