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Obtaining workability characteristics


Recent advances in testing SCC workability

 


Successful placement of self-consolidating concrete (SCC) requires that the concrete is proportioned to exhibit high filling capacity, passing ability, and stability. From a rheological point of view, SCC must be proportioned to exhibit low yield stress and moderate plastic viscosity. This paper highlights recent developments of test methods that can be used for materials selection, mix design optimization, and quality control of SCC mixtures. Such test methods include: water retention to evaluate pumpability of concrete, electrical conductivity to evaluate static stability, as well as incline plane and portable vane to determine the structural build up at rest of concrete, which affects formwork pressure and surface quality. Workability characteristics that can be obtained using these various test methods are correlated to rheological parameters of SCC, including yield stress, plastic viscosity, and thixotropy.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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