EFFECT OF ENTRAINED AIR ON STRENGTH AND DURABILITY OF CONCRETE WITH VARIOUS SIZES OF AGGREGATES

PREVIOUS TESTS USING A NATURAL SAND AND A CRUSHED SILICEOUS GRAVEL INDICATED THAT, FOR CONCRETES OF CONSTANT CEMENT CONTENT AND CONSISTENCY (VARYING WATER-CEMENT RATIO), ADEQUATE RESISTANCE TO FREEZING AND THAWING OF AIR-DRIED CONCRETES WAS SECURED WHEN THE AIR CONTENT OF THE MORTAR FRACTION WAS 9 PLUS OR MINUS 1 PERCENT, REGARDLESS OF THE MAXIMUM SIZE OF AGGREGATE USED. THE TESTS REPORTED HEREIN ARE FOR CONCRETES MADE WITH CEMENTS FROM THE SAME SOURCE AS THE INITIAL TESTS AND THE SAME NATURAL SAND. HOWEVER, THE COARSE AGGREGATE USED WAS A CRUSHED LIMESTONE WITH PARTICLE SHAPE AND TEXTURE DIFFERENT FROM THOSE OF THE GRAVEL PREVIOUSLY USED. THREE CEMENT CONTENTS WERE USED AT A CONSTANT SLUMP OF 5 TO 6 INCHES: 4.0, 5.5 AND 7.0 SACKS PER CUBIC YARD OF CONCRETE. THE MAXIMUM SIZES OF AGGREGATE USED WERE 3/8-IN., 3/4-IN. AND 1 1/2-IN. FOR EACH COMBINATION OF CEMENT CONTENT AND MAXIMUM SIZE OF AGGREGATE, FIVE CONCRETES COVERING A FAIRLY WIDE RANGE OF AIR CONTENTS WERE PREPARED. THE RESULTS OF FREEZING AND THAWING TESTS OF THESE CONCRETES CONFIRMED THE RESULTS OF THE EARLIER TESTS. ADEQUATE RESISTANCE TO FREEZING AND THAWING WAS OBTAINED WHEN THE AIR CONTENT OF THE MORTAR FRACTION WAS IN THE RANGE OF 9 PLUS OR MINUS 1 PER CENT. THE REPORT ALSO INCLUDES INFORMATION ON THE EFFECT OF ENTRAINED AIR ON STRENGTH, RESISTANCE TO SALT SCALING, VOLUME CHANGE AND ABSORPTION OF THESE CONCRETES. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/128/128-001.pdf
• Supplemental Notes:
  • No 128, pp 1-19, 9 FIG, 16 TAB Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Klieger, Paul
• Publication Date: 1956

Media Info

• Monograph Title: Durability of concrete
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 128
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Aggregates by shape and surface texture; Air content; Cement content; Coarse aggregates; Compressive strength; Concrete; Concrete tests; Consistency; Crushed limestone; Durability; Entrained air; Freeze thaw durability; Volume changes; Water cement ratio
• Uncontrolled Terms: Aggregate shape; Particle size distribution
• Old TRIS Terms: Concrete consistency
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00213267
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 28 1994 12:00AM