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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: Shrinkage and Crack Propagation of Flowing Concrete at Early Ages
Author(s): S. Hiraishi, K. Yokoyama and Y. Kasai
Publication: Special Publication
Appears on pages(s): 671-690
Keywords: admixtures; cracking (fracturing) concrete; shrinkage; surface drying
Abstract:Flowing concrete is a highly flowable and segregation resistant concrete. Shrinkage of the concrete at early ages up to 24 hours under a constant air flow of 8 m/s starting at the age of 2 hours, and crack propagation of the concrete in a restricted form with a thickness of 50 mm have been studied. The experiments were done by controlling the following four mixture parameters, (I) Water - cement ratio: 0.60, 0.45, 0.35, 0.30 and 0.27, (2) Unit amount of water: 185, 175 and 170 kg/m3, (3) Type of cement: normal, high early strength and belite portland cement, (4) Type of inorganic admixture: a ground granulated blast furnace slag and a fly ash and their respective mixture proportions. Effects of the above parameters on crack propagation at early ages were investigated on the basis of authors’ crack evaluation criteria.
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