INFLUENCE OF NATURAL SAND FINE AGGREGATE ON SOME PROPERTIES OF HARDENED CONCRETE MORTAR

MOST MODERN CONCRETE SPECIFICATIONS INCLUDE REQUIREMENTS FOR QUALITY OF THE FINE AGGREGATE PORTION TO INSURE THAT IT DOES NOT DETRACT FROM THE QUALITY OF THE HARDENED CONCRETE. THE SIGNIFICANCE OF MANY OF THE TESTS USED TO MEASURE FINE AGGREGATE QUALITY, HOWEVER, IS ONLY POORLY UNDERSTOOD. THIS PAPER REPORTS A LABORATORY STUDY OF 25 NEW YORK NATURAL SANDS AND THE EFFECT THAT VARIATIONS IN THEIR CHARACTERISTICS HAVE ON THE FREEZE-THAW DURABILITY, DRYING SHRINKAGE AND WATER REQUIREMENT OF CONCRETE MORTAR. THE PURPOSE OF THIS STUDY WAS TO DEFINE SIGNIFICANT AGGREGATE PROPERTIES AND TO SUGGEST PRACTICAL METHODS OF MEASURING THEM. IT IS CONCLUDED THAT EXCEPT FOR VARYING AMOUNTS OF SURFACE DAMAGE IN THE FORM OF SMALL PITS OR POPOUTS, EVEN EXTREMELY LOW QUALITY FINE AGGREGATE, IN ITSELF, WILL CAUSE NO FREEZE-THAW DETERIORATION OF AIR-ENTRAINED CONCRETE. THE DIFFERENT FINE AGGREGATES, HOWEVER, DID CAUSE VARIATIONS IN MORTAR SHRINKAGE AND WATER REQUIREMENT. MODULUS OF ELASTICITY WAS FOUND TO BE THE MOST SIGNIFICANT AGGREGATE PROPERTY AFFECTING SHRINKAGE. BOTH AGGREGATE ELASTICITY AND WATER REQUIREMENT CORRELATED EMPIRICALLY WITH RESULTS OF THE MAGNESIUM SULFATE SALT SOUNDNESS TEST. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1966/124/124-002.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Durability of Concrete--Physical Aspects and presented at the 45th Annual Meeting. 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:
  • Chamberlin, William P
• Publication Date: 1966

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 18-40
• Monograph Title: Aggregates for concrete
• Serial:
  • Highway Research Record
  • Issue Number: 124
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Aggregates; Concrete; Definitions; Drying; Fine aggregates; Freeze thaw durability; Laboratory studies; Measurement; Modulus of elasticity; Mortar; Physical properties; Properties of materials; Sand; Shrinkage; Water consumption
• Uncontrolled Terms: Concrete properties
• Geographic Terms: New York (State)
• Old TRIS Terms: Natural sand fine aggregate; Water requirements
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00211960
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Oct 28 1994 12:00AM