Comparison of Concrete Rheometers.
Comparison of Concrete Rheometers.
(3817 K)
Brower, L. E.; Ferraris, C. F.
Concrete International, Vol. 25, No. 8, 41-47, August
2003.
Keywords:
concretes; rhoemeters; rheology; ACI 236A
Abstract:
Concrete mixtures require sufficient workability for
proper placement. In particular, sprayed, pumped and
self-compacting concretes require careful definition and
control of their flow properties to produce good
workability. The American Concrete Institute (ACI)
sub-committee 236A, "Workability of Fresh Concrete," is
taking a material science-based approach to provide
better methods for measuring concrete workability. This
paper will summarize the test performed in France in
October 2000 to compare five concrete rheometers. Some
conclusions will be drawn and an outline of further
needed research will also be given.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899