A NEW RHEOMETER FOR SOFT-TO-FLUID FRESH CONCRETE

This article describes the development of apparatus designed to characterize the rheological behavior of fresh concrete, both in the lab and on site, in the range of consistency from soft to fluid. The principles that governed the design of the rheometer are first recalled. It is a torsional rheometer, in which a sample shaped like a hollow cylinder is sheared between two horizonal planes. The conduct of the tests is then described, followed by their processing, which yields, in particular, two physical quantities to characterize a concrete, the shear yield stress, and the plastic viscosity. These parameters may be measured with or without vibration, giving different values in each case. Later, the results of experiments are described. They deal with the detection, with only one sample, of the phenomenon of loss of workability, and with the pumpability of the concrete on site, respectively. The article concludes with a look at the prospects for industrial use of the BT RHEOM rheometer.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • de Larrard, F
  • Hu, C
  • Sedran, T
  • Szitkar, J C
  • Joly, M
  • Claux, F
  • Derkx, F
• Publication Date: 1997-5

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 234-243
• Serial:
  • ACI Materials Journal
  • Volume: 94
  • Issue Number: 3
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Concrete; Concrete tests; Consistency; Dilatancy; Fresh concrete; Industrial materials; Physical properties; Pumps; Rheological properties; Rheometers; Superplasticizers; Thixotropy; Viscosity; Workability; Yield stress
• Uncontrolled Terms: Concrete properties
• Old TRIS Terms: Industrial use
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00740096
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 25 1997 12:00AM