Fabricating a new Rheometer for Concrete
Main Article Content
Abstract
A new concrete rheometer is introduced including its innovation, actual design, working rules,
calibration, and reliability. A modified design of Tattersall two-point device is created. Some of
components are purchased from local and foreign markets, while other components and the
manufacturing process are locally fabricated. The matching viscosity method of determining the mixer
viscometer constants is demonstrated and followed to relate torque and rotational speed to yield stress
and viscosity (Bingham parameters). The calibration procedures and its calculation are explained.
Water is used as a Newtonian fluid, while; cement paste (cement + water) with w/c ratio equal to
(0.442) is used as a non-Newtonian fluid. The cement paste is tested in “Petroleum Research and
Development Center” by “OFITE Model 800 Viscometer”. In order to verify the reliability of the new
rheometer, an Artificial Neural Network (ANN) model with a well selected bank of data is constructed;
and (16) Mixes of Self Compacting Concrete (SCC) are constructed, mixed and tested by the new
Rheometer. The results from model (predicted) and those from the experimental work (measured) were
found to have very good degrees of correlation and matching, which indicates that the new rheometer
can be reliable.
Article Details
Section
How to Cite
References
Bartos, P.J.M., Sonebi, M., Tamimi, A.K. (Eds.), 2002. Workability and Rheology of Fresh Concrete Compendium of Tests,” Cachan Cedex, France: RILEM.
Cabrera, J.G., and Hopkins, C.J. , 1984. A modification of the Tattersall Two-Point Apparatus for Measuring Concrete Workability, Magazine of Concrete Research, 36(129), 237-240.
Castell-Perez, M. E., and Steffe, J. F, 1990 Evaluating Shear Rates for Power Law Fluids in Mixer Viscometry, J. Texture Stud.21:439-453.
Castell-Perez, E.M. and J.F. Steffe, 1992. Using Mixing to Evaluate Rheological properties, In: Rao,
A.M. and J.F. Steffe (editors). Viscoelastic Properties of Food. Elsevier Applied Sci. Pub., Ltd., Barking, England. pg. 247-284.
Dolan, K.D. and J.F. Steffe, 1990. Modeling the Rheological Behavior of Gelatinizing Starch Solutions using Mixer Viscometry Data, J. Texture Stud. 21: 265-294.
Eric P. Koehler and David W. Fowler, 2006. Development and Use of a Portable Rheometer for Concrete, Eighth CANMET/ACI International Conference on Recent, Advances in Concrete Technology, Montreal, Canada, June.
Eric P. Koehler and David W. Fowler, 2007. Aggregates in Self Consolidating Concrete. International Center for Aggregates Research (ICAR) .
Ferraris, C. F , 1999. Measurement of the Rheological Properties of High Performance Concrete: State of the Art Report, J. Res. Natl. Inst. Stand. Technol., Vol. 104, No. 5, pp. 461–478.
Ferraris C. F., Larrard F. and Martvs N , 2000. Fresh Concrete Rheology: Recent Developments, National Institute of Standards and Technology.
Ferraris, C.F., and Brower, L.E. (Eds.), 2001. Comparison of Concrete Rheometers International tests at LCPC (Nantes, France) in October 2000. (NISTIR 6819). Gaithersburg, MD: National Institute of Standards and Technology .
Ferraris, C. F., and Brower, L. E. (Eds.), 2004. Comparison of Concrete Rheometers: International Tests at MB (Cleveland OH, USA) in May 2003, NISTIR 7154, National Institute of Standards and Technology Gaithersburg, MD.
Goh, A. T. C, 1995. Neural Networks for Evaluating CPT Calibration Chamber Test Data, Microcomputers in Civil Engineering, Vol. 10, pp. 147-151 .
Josef Petrus Jooste, 2006. Approaches to Mix Design and Measurement of Workability for SelfCompacting Concrete, M.Sc. Thesis, University of the Witwatersrand, Johannesburg.
Kwan, A. K. H, 2000. Use of Condensed Silica Fume for Making High-Strength, Self-Consolidating Concrete, Canadian Journal of Civil Engineering, Vol. 27, No. 4, pp. 620-627.
Leslie J. Struble and Xihuang Ji, 2001. Handbook of Analytical Techniques in Concrete Science and Technology. Institute for Research in Construction National Research Council Canada .
Laskar A. I., and Talukdar S , 2007 Design of a New Rheometer for Concrete, Journal of ASTM International, Vol. 5, No. 1).
Mackey, K. L., Morgan, R. G., and Steffe, J. F 1987. Effects of Shear-Thinning Behavior on Mixer Viscometry Techniques, J. Texture Stud. 18:231-240.
Oskar Esping, 2007. Early Age Properties of Self Compacting Concrete, Department of Civil and Environmental Engineering, Chalmers University Of Technology, Göteborg, Sweden.
Steffe, J.F., F.A. Osorio and R.Y. Ofoli, 1989.“Dynamic and Steady Rheological Properties of Starch based Pie Filling. In: Ang, H.G. (editor). Trends in Food Science. Part Six, Rheological Studies, pg. 128-130, The Singapore Inst. Food Sci. and Technol., Republic of Singapore.
Tattersall, G.H., and Bloomer, S.J, 1979,Further Development of the Two-Point Test for Workability and Extension of its Range, Magazine of Concrete Research, 31(109), 202-210.
Tattersall, G.H., and Banfill, P.F.G, 1983. The Rheology of Fresh Concrete. Marshfield, MA: Pitman Publishing.
Tattersall,G.H., 1990. Progressin Measurement of Workability by the Two-Point Test, H.-J. Wierig, Ed., Properties of Fresh Concrete, Proc of the Coll. RILEM, Chapman and Hall, 203-212.
Vincent A. Hackley and Chiara F. Ferraris, 2001. Guide to Rheological Nomenclature: Measurements in Ceramic Particulate Systems, NIST Special Publication 946.
Whorlow,R.W, 1992. Rheological Techniques. Chicheser, West Sussex, England: Ellis Horwood Limited.