AN EXPERIMENTAL STUDY ABOUT ESTIMATION METHOD OF CHLORIDE ION PENETRATION INTO CONCRETE WHICH USED FLY ASH AS ADMIXTURE

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  • IGUCHI Shigenobu
    EAST JAPAN RAILWAY COMPANY, Jyoshinetsu Construction Office（6-26, Sakae-cho, Takasahi-shi, Gunma 370-8543, Japan）
  • MATSUDA Yoshinori
    EAST JAPAN RAILWAY COMPANY, Structural Engineering Center（2-2-6, Yoyogi, Shibuya-ku, Tokyo 151-8512, Japan）

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  • フライアッシュを混和材に用いたコンクリートの塩分浸透予測式に関する実験的検討

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<p>We carried out salt water immersion test to the concrete which used fly ash as admixture. With the concrete using the fly ash, the penetration of chloride ion stagnated at about 20mm or 30mm depth. On the other hand, the diffusion coefficient and the surface concentration of chloride ion changed depending on immersion time. Then we calculated the concentration of Cl− in each depth with diffusion coefficient and the surface concentration of chloride ion are variable of time. At the result, we could show the stagnation phenomenon of the chloride ion.</p>

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