Detailed investigation of 38 year old concrete sewerage pipes deteriorated by sulphuric acid attack

Daisuke Yamamoto, Hiromichi Matsushita, Isamu Sekino, Hidenori Hamada

研究成果: 著書/レポートタイプへの貢献会議での発言

1 引用 (Scopus)

抜粋

In Japan, the sewerage pipes constructed during the high economic growth period (1960s- 1970s) are obviously getting older. The maintenance of huge sewerage infrastructure stocks is becoming important. Especially in some cases, the actual service life is rather shorter than the expected life. Due to such deterioration, serious damages such as water leak and roads sinking are often reported. It is clear that this deterioration is due to sulphuric acid attack generated by microorganism activity in drainage. At present, a lot of inspections of corrosion arc ongoing on sewerage pipes. In this research, 38 year old sewerage pipes deteriorated by sulphuric acid attack were investigated on internal concrete deterioration. From this investigation, it was confirmed that deteriorated area of concrete was also neutralized, and Vickers hardness was lower, total pore volume was larger, and the content of Ca was lower than other part of concrete. However, the area behind neutralized area in concrete was not deteriorated. Therefore, deteriorated area could be recognized from non-deteriorated area at a certain depth. These results can be used for improvement of the maintenance technology on drainage facilities for the future.

元の言語英語
ホスト出版物のタイトルAdvances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010
出版者Hokkaido University Press
ページ557-566
ページ数10
ISBN(印刷物)9784832903609
出版物ステータス出版済み - 1 1 2010
イベント2nd International Conference on Durability of Concrete Structures, ICDCS 2010 - Sapporo, 日本
継続期間: 11 24 201011 26 2010

出版物シリーズ

名前Advances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010

その他

その他2nd International Conference on Durability of Concrete Structures, ICDCS 2010
日本
Sapporo
期間11/24/1011/26/10

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Ocean Engineering
  • Building and Construction

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  • これを引用

    Yamamoto, D., Matsushita, H., Sekino, I., & Hamada, H. (2010). Detailed investigation of 38 year old concrete sewerage pipes deteriorated by sulphuric acid attack. : Advances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010 (pp. 557-566). (Advances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010). Hokkaido University Press.