WORKABILITY OF GAP-GRADED VERSUS CONTINUOUSLY-GRADED CONCRETE AND THE CORRELATION OF SLUMP WITH VEBE TIME

THE WORKABILITY OF BOTH GAP-GRADED AND CONTINUOUSLY-GRADED CONCRETES OF VARIOUS MIXTURE PROPORTIONS HAS BEEN MEASURED CONCURRENTLY BY THE SLUMP OF A STANDARD CONE AND BY A VEBE CONSISTOMETER. THE RESULTS ARE COMPARED FOR BOTH CONCRETES ON THE BASIS OF EQUAL MAXIMUM SIZE OF COARSE AGGREGATE, WATER-CEMENT RATIO, AND AGGREGATE-CEMENT RATIO. THE COMPARISON HAS SHOWN THE RELATIVE BASE OF PLACING GAP-GRADED CONCRETE TO ATTAIN UNIFORM COMPACTION. BASED ON TEST DATA, A COMPARATIVE STUDY OF THE EFFICACY OF SLUMP TEST VERSUS VEBE TIME AS A MEASURE OF WORKABILITY HAS BEEN MADE. THE SLUMP TEST IS NOT FULLY INDICATIVE OF THE WORKABILITY FOR STIFFER MIXTURES WITH SLUMP LESS THAN ONE INCH (2.54 CM) WHICH SHOULD BE NORMALLY USED FOR OBTAINING ECONOMICAL HIGH-STRENGTH CONCRETE. IT FURTHER INDICATES THAT THE VEBE CONSISTOMETER SHOULD BE USED, INSTEAD, IN ALL STIFF MIXTURES. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Shu-t'ienmaw
  • Ramakrishnan, V
• Publication Date: 1971-7

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 403-12
• Serial:
  • Cement and Concrete Research
  • Volume: 1
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Admixtures; Coarse aggregates; Concrete; Concrete tests; Consistency; Economic efficiency; Gap grading; Instruments for measuring consistency; Water cement ratio; Workability
• Uncontrolled Terms: Efficiency
• Old TRIS Terms: Consistometers
• Subject Areas: Economics; Highways; Materials;

Filing Info

• Accession Number: 00214385
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Apr 17 1973 12:00AM