CAUSES, MECHANISMS AND CONTROL OF SURFACE VOIDS

The author distinguishes three types of voids in a concrete surface: water voids, air voids, and attached voids. If sands with higher surface area factor, and a smaller size of gravel with smoother surface and a spherical shape are used, plus longer mixing than classical preparation, with vibration, hammering and revibration, a concrete can be manufactured not only without surface voids but also with a strength as high as 10,000 PSI. Appendix 1 describes a mechanism for increasing concrete strength by using a larger size gravel with the same quantity of water, cement and sand. Appendix 2 describes experiments which were undertaken to find a mix producing a concrete without, or with few, voids. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00105317
• Corporate Authors:

  Cement and Concrete Association

  52 Grosvenor Gardens
  London SW1W 0AQ,   England 
• Authors:
  • Stamenkovic, H
• Publication Date: 1973

Language

• English

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 45-48
• Serial:
  • CONCRETE
  • Volume: 7
  • Issue Number: 7
  • Publisher: THE CONCRETE SOCIETY
  • ISSN: 0010-5317

Subject/Index Terms

• TRT Terms: Aggregates by shape and surface texture; Air voids; Concrete; Gravel; Mix design; Sand; Strength of materials; Void ratios
• Uncontrolled Terms: Aggregate shape
• Old TRIS Terms: Air voids content; Void
• ITRD Terms: 4577: Aggregate; 4755: Concrete; 4575: Gravel; 4714: Mix design; 4105: Sand; 9073: Shape; 4743: Shrinkage; 5544: Strength (mater); 5937: Structure (physicochem); 5558: Vibration
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00083293
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 29 1975 12:00AM