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Title: Modeling Static Segregation of Self-Consolidating Concrete

Author(s): Lin Shen, Leslie Struble, and David Lange

Publication: Materials Journal

Volume: 106

Issue: 4

Appears on pages(s): 367-374

Keywords: segregation; self-consolidating concrete; rheology.

DOI: 10.14359/56657

Date: 7/1/2009

Abstract:
To help prevent static segregation in self-consolidating concrete (SCC), which occurs when aggregate sinks in concrete at rest, a numerical model based on rheology and fluid dynamics was developed to calculate the settling speed of the interface between paste and aggregate. The model was found to describe static segregation with reasonable accuracy. The properties seen to affect static segregation included paste rheology (viscosity and yield stress) and aggregate size, maximum volume fraction, volume fraction, and density.