RISK ASSESSMENT OF CONCRETE SPALLING/ FALLING FOR REINFORCED CONCRETE WALLS BASED ON VISUAL INSPECTION

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  • NAKADA Kiyofumi
    Dept. of Building Materials and Components, Building Research Institute
  • MATSUZAWA Koichi
    Dept. of Building Materials and Components, Building Research Institute
  • TANANO Hiroyuki
    Dept. of Building Materials and Components, Building Research Institute
  • KAGE Tadatsugu
    Dept. Building Materials and Components, Building Research Institute
  • TSUCHIYA Naoko
    National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism
  • MISHIMA Naoki
    National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism

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  • 目視検査に基づく鉄筋コンクリート造壁面におけるコンクリート剥離・剥落の危険性判定手法

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Abstract

<p>The aim of this study is to investigate the behaviors of corrosion-induced concrete spalling/falling from fair-faced RC walls and to propose risk assessment methodology for them based on visual inspection. Accelerated corrosion tests show that detectable concrete spalling/falling occurs when cover depth is under 30mm and that rapid increase of concrete spalling/falling follows increase of surface cracking. We propose a framework of criteria for detecting the symptom of the rapid increase, where deterioration degree of inspected walls is divided into 3 stages based on crack index Ic . The criteria for Ic is determined by average cover depth of the walls.</p>

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