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Measurement of the Rheological Properties of Cement Paste: A New Approach.


pdf icon Measurement of the Rheological Properties of Cement Paste: A New Approach. (635 K)
Ferraris, C. F.

Role of Admixtures in High Performance Concrete, RILEM International Symposium. Proceedings. Sponsored by Cementos Mexicanos, S.A. (CEMEX). March 21-26, 1999, Monterrey, Mexico, RILEM Publications S.A.R.L., Cabrera, J. G.; Rivera-Villarreal, R. R., Editor(s)(s), 333-342 pp, 1999.

Keywords:

cement paste; rheology; concretes; building materials

Abstract:

This paper presents a new approach for predicting the rheological properties of concrete from rheological measurements on cement paste and from concrete composition. This approach requiresmeasurement of the cement paste rheology under the same conditions as those experienced in the concrete. It is known that the rheology of concrete is afkcted by the cement paste content, by contributing to the gap between the aggregates. A parallel plate fluid rheometer was used to simulate the gap between the aggregates. It is demonstrated that the distance between the plates affects the rheological parameters of cement paste. Some preliminary results are presented and discussed. As the mixing procedure affects the values of the rhealogical parameters of the cement paste, special precautions were taken to mix the paste under the same conditions as those experienced in the concrete.