Controlling the quality of fresh concrete - a new approach

From National Research Council Canada

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Author	Search for: Maadani, O.¹; Search for: Chidiac, S. E.¹; Search for: Razaqpur, A. G.; Search for: Mailvaganam, N. P.¹
Affiliation	National Research Council of Canada. NRC Institute for Research in Construction
Format	Text, Article
Subject	concrete workability, rheology, consistency; Concrete
Abstract	Traditionally, the slump test has been used to measure concrete consistency. However, many researchers contend that the slump alone is not a sufficient measure of consistency and that other quantifiable rheological properties such as shear yield stress and plastic viscosity are more representative and should be considered. A SLump Rate Machine (SLRM) was adapted and calibrated, to consistently measure the plastic properties for a number of concrete mixes, namely slump rate and slump flow. Furthermore, a theoretical model was developed to correlate the slump flow and slump rate with the shear yield stress and plastic viscosity of fresh concrete, respectively. Employing the SLRM and the theoretical model has resulted in an efficient new approach to adequately predict the rheological behaviour of fresh concrete as well as to provide reasonably accurate values for shear yield stress and plastic viscosity.
Publication date	2000-10-01
In	Magazine of Concrete Research 52, no. October 5 (1 October 2000): 353–363.
Language	English
Peer reviewed	Yes
NRC number	NRCC 43146 NRC-IRC-9637
NPARC number	20331317
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Record identifier	d9127945-5990-47d7-953a-744f4c60b3f4
Record created	2012-07-18
Record modified	2020-03-26

Date modified:: 2024-04-23