Why Rheology Matters

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Title: Why Rheology Matters

Author(s): Francois De Larrard

Publication: Concrete International

Volume: 21

Issue: 8

Appears on pages(s): 79-81

Keywords: Bingham model; high-performance concrete; materials science; mix proportioning; plastic viscosity; rheology

DOI:

Date: 8/1/1999

Abstract:
This article is aimed at convincing engineers that a rheological approach to fresh concrete is needed. Rheological concepts, including the Bingham model and the rheometer, are described. Then, an example of high-performance concrete (HPC) devoted to bridge construction is emphasized. It is shown that prevention of slump losses, pumpability and deck slope stability can be controlled with the help of a rheometer. Typical rheological specifications are given, and directions are proposed to adjust a HPC mixture to match those specifications.




  

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