Title:
238.2T-14: Concrete Thixotropy (TechNote)
Author(s):
ACI Committee 238
Publication:
Technical Documents
Volume:
Issue:
Appears on pages(s):
6
Keywords:
aggregate segregation; formwork pressure; plastic viscosity; pumpability; rheology; rheometer; static yield stress; thixotropy; yield stress.
DOI:
Date:
6/1/2014
Abstract:
Fresh concrete can exhibit different rheological behavior when at rest than when flowing. This difference is due to thixotropy, which can have important consequences for formwork pressure, multi-lift casting, slip-form paving, pumping, and segregation resistance. This TechNote defines thixotropy and distinguishes it from other changes in rheological properties; discusses the origins of, test methods for measuring, and factors affecting thixotropy; and concludes with its applications.