Evaluation of calcium leaching from cement hydrates using electrical accelerating treatment

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  • YOKOTA Hiroshi
    東京大学生産技術研究所　都市基盤安全工学国際研究センター（北海道大学大学院工学研究院）
  • HASHIMOTO Katsufumi
    北海道大学大学院工学研究院北方圏環境政策工学部門
  • SASAKI Ryosuke
    北海道電力株式会社日高水力センター土木課（前北海道大学工学部）

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Other Title
  • 電気的促進試験を用いたセメント水和物溶脱の評価
  • デンキテキ ソクシン シケン オ モチイタ セメント スイワブツ ヨウ ダツ ノ ヒョウカ

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Abstract

When water penetrates into the cement hardened body of concrete structures under saturated conditions, the hydration products dissolve into pore solution and Ca ion leaches out from the hardened body. The Ca leaching makes permeability of the cement hardened body low. In radioactive waste processing structures, for example, long-term durability against the Ca leaching is fully investigated. In this study, an immersion experiment and an electrical accelerating experiment have been performed to evaluate the stability of cement hardened body. The phase change of hydration products is discussed with the results of XRD and TG-DTA analyses.

Journal

  • SEISAN KENKYU

    SEISAN KENKYU 65 (4), 557-561, 2013

    Institute of Industrial Science The University of Tokyo

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