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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: Characteristics of Concrete Containing a Shrinkage-Reducing Superplasticizer for Ultra-High-Strength Concrete
Author(s): T. Sugamata, T. Kinoshita, M. Yaguchi, and K. Harada
Publication: Special Publication
Appears on pages(s): 51-66
Keywords: autogeneous shrinkage strain; compressive strength; setting time; shrinkage reducing; superplasticizer; ultra-high-strength concrete
Abstract:In Japan, the applications of ultra-high-strength concrete having a design strength of 100 MPa are increasing. Such high-strength concrete offers a number of advantages: reduced column cross section for greater useable floor area; broader elasticity range for suppression of earthquake-induced cracking; and longer service life to meet recent demand in Japan. The potential for the use of this class of concrete will increase in Japan. However, ultra-high-strength concrete of this strength range suffers from critical autogeneous shrinkage strain due to its low water-binder ratio (Silica fume is normally used in such the strength range in Japan). The authors developed a shrinkage-reducing superplasticizer by mixing a glycol-based shrinkage reducing component with a superplasticizer for ultra-high-strength concrete developed by the authors, and studied the properties of concrete containing this new shrinkage-reducing SP in this strength range. Compared with plain concrete (without shrinkage reducing component), the shrinkage-reducing SP reduced the autogeneous shrinkage strain by 15 to 30%, and drying shrinkage strain by 3 to 25%. The rate of reduction increased as the W/C decreased and the amount of shrinkage component increased. The authors determined that the new shrinkage-reducing SP is effective in reducing the autogeneous shrinkage strain in ultra-high-strength concrete.
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