EFFECT OF VARIATIONS IN COARSE-AGGREGATE GRADATION ON PROPERTIES OF PORTLAND CEMENT CONCRETE

The effect of variations in coarse-aggregate agradation on properties of a highway concrete mixture was studied by testing numerous batches of laboratory-preparaed concrete. The water-cement and aggregate-cementratios were the same for all batches; the only variable was the grading of the natural gravel used as coarse aggregate throughout the investigation. Each batch contained a known coarse-aggregate grading, and the entire group of gradings examined represented the variation determined to occur in typical pavement concrete production. The data were obtained and analyzed in a manner that allowed evaluation of the importance of variations in gradation of natural gravel as a source of variabtion in slump, compressive strength, and unit weight of field-produced concrete. On the basis of the results obtained in the investigation, typical field variations in coarse-aggregate gradation appear to have a relatively small effect on slump variablity compared to the combined effect of other factors, a surprisingly large effect on compressive strength, and little effect on the "compactibility" of a low-slump paving mixture.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1973/441/441-009.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309021723
• Supplemental Notes:
  • 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:
  • Baker, S D
  • Scholer, C F
• Conference:
  • 52nd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1973-1-22 to 1973-1-26
• Publication Date: 1973

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 97-110
• Monograph Title: Grading of concrete aggregates
• Serial:
  • Highway Research Record
  • Issue Number: 441
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Aggregate gradation; Coarse aggregates; Compactibility; Compressive strength; Concrete; Consistency; Laboratory tests; Physical properties; Portland cement concrete; Water cement ratio
• Uncontrolled Terms: Concrete properties
• Old TRIS Terms: Concrete consistency
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00159551
• Record Type: Publication
• ISBN: 0309021723
• Files: TRIS, TRB
• Created Date: Sep 20 1977 12:00AM