Workability of Self-Compacting Concrete

Published

December 1, 2000

Author(s)

Chiara F. Ferraris, L Brower, C H. Ozyildirim, J A. Daczko

Abstract

The slump test is widely used to evaluate the workability of Concrete. However it has serious drawbacks, especially for self-compacting concrete (SCC). Other flow characteristics such as viscosity or filling capacity or time of flow through an orifice are needed to characterize flow in SCC. The goals of this study were multiple: 1) to test flow characteristics of SCC using various devices: two concrete rheometrers, several standard tests, and the widely used V-flow and U-flow tests; 2) to determine the correlation between the two rheometers; and 3) to attempt to determine the rheological characteristics of SCC. Thirteen mixes were prepared with varying dosages of viscosity modifying admixture (VMA) and high-range water-reducing admixture (HRWR) to achieve a wide range of flow behavior. It was found that the plastic viscosities, measured with the two rheometers were correlated at 84% and that a SCC mixture is not defined by the high slump and slump spread alone.

Proceedings Title

High Performance Concrete; PCI/FHWA/FIB International Symposium on High Performance Concrete, International Symposium | | | PCI

Conference Dates

September 25-27, 2000

Conference Title

International Symposium on High Performance Concrete

Pub Type

Conferences

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Keywords

concrete, concrete rheometers, flowable concrete, self-compacting concrete, U-flow, V-flow

Citation

Ferraris, C. , Brower, L. , Ozyildirim, C. and Daczko, J. (2000), Workability of Self-Compacting Concrete, High Performance Concrete; PCI/FHWA/FIB International Symposium on High Performance Concrete, International Symposium | | | PCI, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860252 (Accessed October 11, 2024)