THE INFLUENCE OF WATER-REDUCERS ON THE PRODUCTION AND STABILITY OF THE AIR VOID SYSTEM IN CONCRETE

This paper investigates the influence of water reducers on the production and stability of the air road system in concrete. Thirty-six concrete mixes were made using different admixture combinations and dosages (3 types of air-entraining agent and 3 types of water-reducer were used). Air void charateristics of the hardened concrete were measured on specimens of each mix cast after different mixing periods in order to study the production and the stability of the air void system (air content and spacing factor). Results clearly show that certain admixture combinations and dosages produce satisfactory air void systems (l<200 micron and stable throughout mixing) whereas others seem to be incompatible. The use of double dosages of water-reducers was found to have a deleterious effect on the production and stability of the air void system. No correlation was noted between the spacing factor variations and air content variations with time.(a)

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• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Plante, P
  • Pigeon, M
  • Foy, C
• Publication Date: 1989-7

Language

• English

Media Info

• Pagination: p. 621-633
• Serial:
  • Cement and Concrete Research
  • Volume: 19
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Admixtures; Air; Concrete; Mix design; Stability (Mechanics); Void ratios; Water reducing agents
• Old TRIS Terms: Void
• ITRD Terms: 4736: Admixture; 6714: Air; 4755: Concrete; 4714: Mix design; 4725: Plasticizer; 5938: Porosity; 5930: Stability
• Subject Areas: Materials;

Filing Info

• Accession Number: 00498622
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM