Repair Performance of Re-injecting of LiNO<sub>2</sub>-containing Solution and Grout into Incomplete Grouting Area and Its Example of Application to an Actual PC Bridge

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  • Kamotani T.
    （株）ピーエス三菱技術本部 技術部 開発メンテナンスグループ
  • Ebina T.
    （株）ピーエス三菱東北支店 土木工事部
  • Aoyama T.
    （株）ピーエス三菱技術本部 技術部 開発メンテナンスグループ
  • Morikawa H.
    神戸大学大学院 工学研究科 市民工学専攻

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Other Title
  • 亜硝酸リチウムを用いたPCグラウト充てん不足部の新しい補修方法の腐食抑制効果と実橋への適用事例
  • アショウサン リチウム オ モチイタ PC グラウト ジュウテン フソクブ ノ アタラシイ ホシュウ ホウホウ ノ フショク ヨクセイ コウカ ト ミノルバシ エ ノ テキヨウ ジレイ
  • Repair Performance of Re-injecting of LiNO2-containing Solution and Grout into Incomplete Grouting Area and Its Example of Application to an Actual PC Bridge

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Description

In some PC Bridges, incomplete groutings, like poor procedures, poor mixtures and so on, formed the voids in the post-tensioning duct. The PC tendons suffered corrosion damages due to chloride ions invaded into the voids in the area spraying antifreezing agent in winter season. The authors proposed re-injecting of LiNO2-containing solution and grout recently as a new countermeasure against the voids and corrosion of PC tendons. In this paper, The experiment with concrete specimens in order to verify repair performance of this method and its example of application to an actual PC bridge are introduced.

Journal

  • Concrete Journal

    Concrete Journal 50 (12), 1084-1091, 2012

    Japan Concrete Institute

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