複数の指示薬を使用したコンクリートPHの評価方法に関する研究 A Study on Evaluation Method of pH in Concrete Applying Multiple Indicators

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Author(s)

Abstract

Phenolphthalein method is utilized as the general diagnosis method on neutralization of concrete. However, this method cannot satisfy to indicate the soundness of reinforced concrete. In this research, the applicability of phenolphthalein method to the specific evaluation and prediction of neutralization was evaluated through the analytical and the experimental method. As a result, analytical estimation using image processing on pH distribution of cement hydrates was possible by multiple indicators: two concentrations of phenolphthalein solution and 0.4 % concentration of tropaeolin O solution. It was also clarified that visual inspection method using two types of indicator (1.0 % concentration of phenolphthalein solution and 0.4 % concentration of tropaeolin O solution) can give sufficient and accurate information about the relationship between the discolored pH and its depth from surface of concrete. Finally, new evaluation method was proposed for specific evaluation on neutralization of concrete considering the remaining neutralization time.

Journal

  • Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering

    Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 81(2), 163-170, 2013-04-25

    The Japanese Society of Irrigation, Drainage and Rural Engineering

References:  9

Codes

  • NII Article ID (NAID)
    10031171487
  • NII NACSIS-CAT ID (NCID)
    AA12240517
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    18822789
  • NDL Article ID
    024715129
  • NDL Call No.
    Z18-365
  • Data Source
    CJP  NDL  J-STAGE 
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