液体浸漬によるコンクリートの静的圧縮強度低下に関するエネルギー的考察

• 尾上 幸造

  宮崎大学 工学部土木環境工学科

• 松下 博通

  九州大学，福岡建設専門学校

書誌事項

タイトル別名

• ENERGY CONSIDERATION ON STRENGTH DECREASE OF CONCRETE DUE TO IMMERSION OF LIQUID

抄録

In order to clarify the lowering effect of immersion liquid on the compressive strength of concrete, nucleation of internal cracks under static compression was investigated on the basis of surface energy. The energy consumed in the nucleation of cracks is calculated from the area of hysteresis loop on stress-strain relation in the compression test. As a result, it is found that the calculated energy is closely related to the surface energy in the nucleation of cracks. It is also found that the energy increases exponentially with the increase of strain, and decreases with the increase of moisture contents or surface tension of immersion liquid under the same strain ratio. Consequently, it can be concluded that the decrease of compressive strength of concrete due to immersion of liquid results from the decrease of surface energy consumed in the nucleation of internal cracks.

収録刊行物

• 土木学会論文集Ｅ

  土木学会論文集Ｅ 64 (4), 515-525, 2008

  公益社団法人 土木学会

キーワード

• static compressive strength
• immersion of liquid
• microcrack
• crack propagating energy
• surface energy

詳細情報

• CRID: 1390282680230717056
• NII論文ID: 130004943149
• DOI: 10.2208/jsceje.64.515
• ISSN: 18806066
• HANDLE: 10458/1592
• Web Site: https://miyazaki-u.repo.nii.ac.jp/records/963
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可