Japan Society of Civil Engineers 2019 Annual Meeting

Presentation information


技術開発 (3)

Thu. Sep 5, 2019 12:40 PM - 2:10 PM VI-9 (幸町総合教育棟 多目的室2)

座長:池松 建治(鹿島建設)

[VI-1088] Proposal of bubble disappearance theory and experimental verification (part 1: medium-fluidity concrete)

*木作 友亮1、武藤 香穂2、黒澤 隆2、伊藤 祐二3、道脇 裕4 (1. IHI、2. IHI建材工業、3. リブコンエンジニアリング、4. NejiLaw)

Keywords:Theory of CB, Fluctuating inertia force, Surface air bubbles, Amplitude, Frequency, Acceleration

The surface air bubbles in concrete adversely affect the durability of the structures. The purpose of this study is to propose a new theory of bubble disappearance mechanism in concrete. The results of this study showed that there is a correlation between the bubble area ratio and the acceleration. And the acceleration more than 4G caused the material separation. These results clarified that the vibration with the maximum acceleration in the range where material separation does not occur minimizes the surface bubbles.

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