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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 Cracking of High-Strength Concrete and Flowing Concrete at Early Ages
Author(s): K. Yokoyama, S. Hiraishi, Y. Kasai, and K. Kishitani
Publication: Special Publication
Appears on pages(s): 243-258
Keywords: admixtures; air-entraining agents; cracking (fracturing); crack propagation; flowability; high-strength concretes; shrinkage; water-reducing agents; General
Abstract:Paper addresses shrinkage and cracking at early ages of highly flowable flowing concrete with a special admixture (unit amount of water of 185 kg/m 3) and of normal high-strength, viscous concrete with high-range AE water-reducing agents (unit amount of water of 170 kg/m 3) under constant air flow. Results are as follows: 1) shrinkage at early ages of flowing concrete and normal high-strength concrete increased with a decrease in water-cement ratio. Shrinkage of normal high-strength concrete varied according to the admixture composition; 2) cracking of both flowing concrete and normal high-strength concrete within a restricting steel frame initiated at an earlier age and became significant with decreasing water-cement ratio. Time and amount of crack initiation of normal high-strength concrete varied according to admixture composition.
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