Effect of Viscosity Enhancing Agent on Self-Compactability of Fresh Concrete

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Title: Effect of Viscosity Enhancing Agent on Self-Compactability of Fresh Concrete

Author(s): M. Hibino

Publication: Special Publication

Volume: 195

Issue:

Appears on pages(s): 305-320

Keywords: concrete; stability; viscosity

Date: 7/1/2000

Abstract:
The objective of this study is to establish a method that evaluates the stabilization effect of a viscosity enhancing agent. These agents are commonly used to stabilize fluctuations in the quality of fresh concrete during manufacturing and placement. It is assumed that the stability of self compacting concrete can be achieved over a wide range of mixture proportions. Thus, the dosage range of superplasticizer and allowable variation of water-powder ratio were adopted as an index of the stabilization effect. The feature of the proposed method is to provide an estimate of the stability of self-compacting concrete from mortar fluidity. Mortar and concrete tests were carried out to verify the proposed evaluation method. As a result, it was experimentally verified that several types of viscosity enhancing agents have the ability to stabilize the fluidity of fresh concrete.