The rheology of fiber-reinforced cement paste evaluated by a parallel plate rheometer

Title: The rheology of fiber-reinforced cement paste evaluated by a parallel plate rheometer
Author(s): Katherine G. Kuder, Nilufer Ozyurt, Bin Mu, S. P. Shah
Paper category : conference
Book title: International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur
Editor(s): J. Weiss, K. Kovler, J. Marchand, and S. Mindess
Print-ISBN: None
e-ISBN: 2912143926
Publisher: RILEM Publications SARL
Publication year: 2004
Nb references: 26
Language: English

Abstract: Fibers are often used as reinforcement in cementitious materials because they can improve hardened state properties, including strength, ductility and durability. However, fibers often make cementitious materials difficult to work with in the fresh state, which can compromise the hardened state properties. Rheological parameters can be used to describe these fresh state properties. By developing a better understanding of the rheology of fiber-reinforced cementitious materials, fibers can be incorporated more efficiently, so that the mechanical performance of the hardened materials is not adversely affected, and the material can be handled with ease in the fresh state. In this study, a parallel plate rheometer was designed and built to study stiff fiber-reinforced cementitious materials. Initially, yield stress and viscosity measurements from the parallel plate rheometer were verified to ensure that the rheometer yielded reasonable results. Next, the effect of steel fibers on the rheology of neat cement paste was studied. At the low fiber volumes tested, 1% and 2%, by volume, increasing fiber content caused a decrease in yield stress and did not affect viscosity. In this paper, the properties of the new parallel plate rheometer, the verification process and experimental work on fiberreinforced cement pastes are described and discussed.

Online publication: 2004-03-25
Classification: Self-Consolidating Concrete
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.037