THE ROLE OF ADMIXTURES IN PUMPING CONCRETE

The addition of admixtures to concrete, which is to be pumped, is described. Prior to the development of admixtures, the mix had to be modified to facilitate its pumping. The problems involved in modifying mixes are outlined. Admixtures make concrete more plastic and homogenous, while enhancing the physical properties of the hardened concrete. The properties of air-entraining, water-reducing and retarding admixtures are given. Recently developed pumping aids act as a lubricant, which improves the ease of pumping a given mix, so that mixes can be pumped without alteration. At present there are no standards or specifications for pumping aids /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/05490219
• Corporate Authors:

  New Zealand Portland Cement Association

  Securities House, 126 The Terrace, P.O. Box 3644
  Wellington,   New Zealand 
• Authors:
  • Prior, M E
• Publication Date: 1974-8

Language

• English

Media Info

• Features: Photos;
• Pagination: p. 29-31
• Serial:
  • NEW ZEALAND CONCRETE CONSTRUCTION
  • Volume: 18
  • Issue Number: 4
  • Publisher: CEMENT & CONCRETE ASSOCIATION OF NEW ZEALAND
  • ISSN: 0549-0219

Subject/Index Terms

• TRT Terms: Admixtures; Air entrained concrete; Air entraining agents; Concrete; Lubricants; Plasticizers; Pumped concrete; Pumps; Retarders (Chemistry); Retarders (Concrete); Water reducing agents
• Old TRIS Terms: Retarder
• ITRD Terms: 4736: Admixture; 4742: Air entrained concrete; 4755: Concrete; 4725: Plasticizer; 3833: Pumping; 4727: Retarder (concrete)
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00096174
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jul 24 1975 12:00AM