ESTIMATING PROPORTIONS FOR STRUCTURAL CONCRETE MIXTURES

SIMPLE FORMULAS ARE PRESENTED FOR THE PREDICTION OF FRESH UNIT WEIGHT AS WELL AS FOR THE RELATIONSHIP BETWEEN CEMENT CONTENT AND MIX PROPORTIONS OF VARIOUS STRUCTURAL CONCRETES. THESE FORMULAS ARE USEFUL MAINLY FOR PROPORTIONING STRUCTURAL LIGHTWEIGHT AND HEAVYWEIGHT CONCRETES BECAUSE THE UNIT WEIGHT AND THE CEMENT CONTENT HAVE GREATER SIGNIFICANCE FOR THESE MIXTURES THAN FOR NORMAL WEIGHT CONCRETES. THE FORMULAS ARE ALSO APPLICABLE WHEN THE MINERAL AGGREGATE IN QUESTION IS BLENDED WITH AGGREGATES OF DIFFERING SPECIFIC GRAVITIES--SUCH AS A CONVENTIONAL SAND AND A LIGHTWEIGHT COARSE AGGREGATE--PROVIDED THAT THE AVERAGE SPECIFIC GRAVITY OF THE BLENDED AGGREGATE IS COMPUTED BY A FORMULA DEVELOPED FOR THIS PURPOSE. EXPERIMENTAL RESULTS SUPPORT THE FORMULAS WITHIN A WIDE RANGE. THE LIMITS OF VALIDITY ARE GIVEN. NUMERICAL EXAMPLES ILLUSTRATE THE USE OF THE FORMULAS. /AUTHOR/

• Supplemental Notes:
  • Vol 65, No 2, PP 143-150, 6 FIG, 16 REF
• Authors:
  • Popovics, S
• Publication Date: 1968-2

Media Info

• Serial:
  • Am Concrete Inst Journal & Proceedings

Subject/Index Terms

• TRT Terms: Cement content; Formulas; Mineral aggregates; Mix design; Proportioning; Specific gravity; Structural materials; Weight
• Old TRIS Terms: Unit weight
• Subject Areas: Construction; Highways; Materials;

Filing Info

• Accession Number: 00212598
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 3 1994 12:00AM