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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Empirical and Fundamental Methods for Measuring Rheological Properties of Cement-Based Materials
Author(s): B. G. Petersen and K. Reknes
Publication: Special Publication
Appears on pages(s): 271-282
Keywords: cement; flow; lignosulphonate; mortar; plasticizer; rheology; viscosity; yield value
Abstract:Work has been done on comparing different methods for measuring rheological properties of cement based materials. These properties are used to describe the effect of superplasticizing admixtures. A concentric cylinder viscometer and rheometer with bob-cup geometry were used to measure the viscosity and yield point of cement paste, and mini-slump for measuring the flow and flow retention of mortar. The coaxial cylinder viscometer and the mini-slump gives emperical results, whereas the rheometer gives a fundamental value describing the viscosity. It is important to be aware of the sensitivity cement based materials have to experimental set-up because of the degree of structural breakdown this will induce in the matrix. Both cement paste's and mortar's rheological properties were measured with different amounts of plasticizing admixtures based on lignosulphonate, at a water to cement ratio of 0.5. The results show correlation between the viscometer and the rheometer. Minislump results follow the same trends.
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