RISK ESTIMATE AND PROPOSAL OF MITIGATION METHOD ON EFFLORESCENCE CAUSED ON HISTORICAL BRICK MASONRY BUILDINGS REINFORCED WITH CONCRETE

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  • MATSUO Takashi
    Institute of Technology, Shimizu Corporation
  • TANAKA Kyoji
    Structural Engineering Research Center, Tokyo Institute of Technology
  • ISHIZAKI Takeshi
    Conservation Science Department, National Research Institute of Cultural Properties, Tokyo

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  • 鉄筋コンクリート補強された歴史的煉瓦造建造物に生じる白華現象の危険度予測と低減方法の提案
  • テッキン コンクリート ホキョウサレタ レキシテキ レンガズクリ ケンゾウブツ ニ ショウジル ハクカ ゲンショウ ノ キケンド ヨソク ト テイゲン ホウホウ ノ テイアン

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Abstract

To design the mitigation method for efflorescence of historical brick masonry buildings reinforced with concrete, the flowchart for mitigating efflorescence was proposed and the efflorescence risk of actual brick masonry building was estimated by using proposed flowchart. Concretely, features on the wall, environmental conditions were grasped, and numerical simulation of water movement was performed. As a result, heavy efflorescence was observed on the part considered efflorescence risk would be high. In addition, mitigation method of efflorescence was proposed and the effect was verified by accelerated test using model wall specimen. It was considered that efflorescence could be mitigated by constructing reliable insulation layer of moisture between brick masonry wall and reinforced concrete.

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