PHYSICAL PROPERTIES OF HIGH QUALITY CONCRETE EXPOSED IN ACID SULFATE SOIL FOR 10 YEARS

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  • HARADA Shizuo
    Dep. of Architecture Miyakonojo National College of Technology
  • MATSUFUJI Yasunori
    Dept. of Environmental Space Design, Faculty of Environmental Engineering
  • KOYAMA Tomoyuki
    Dep. of Architecture and Urban Design, Faculty of Human-Environment Studies, Kyushu University
  • YONEZAWA Toshio
    Construction Technology Research Department, Research and Development Institute Takenaka Corporation
  • TANAKA Kyouichi
    Research and Development, Flowric Co., Ltd.
  • MAEDA Yoshitaka
    Nippon Steel Blast-Fumace Slag Cement Co., Ltd.

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  • 硫酸酸性地盤に10年間暴露された高品質コンクリートの物理性状
  • リュウサン サンセイ ジバン ニ 10ネンカン バクロ サレタ コウヒンシツ コンクリート ノ ブツリ セイジョウ

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Abstract

This research examined the durability performance of high quality concrete in the acid sulfate soil where the pH value was about 4〜5. The outdoor exposure test was carried out in Kirishima Hot Spring zone for more than ten years. The summary of the results is shown below. The ratio of mass decrease of each specimens was 4% or less. The length and dynamic elastic modulus of these specimens hardly changed. Furthermore, the neutralization speed was also very slow. Especially, the concrete having a water-binder ratio of 0.30 showed the outstanding durability performance.

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