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Effect of iron Powder in Electrical Conductivity of Concrete

Ghanbari Chemazketi, Ali | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43876 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Joghataie, Abdolreza
  7. Abstract:
  8. Performance and mechanical properties of concrete such as tensile strength, compressive strength, conductivity, etc change with creation and emission of cracks. As health monitoring of important structures is a vital subject that demands a large amount of budget annualy. Studying problems and disadvantages of concrete is one of the most important branches of research.
    There are many ways to detect damage in concrete. Electrical resistance method that has been used in this thesis. In this study, an instrument called Risistivity Meter is used to measuring the electrical conductivity. This instrument measured the electrical conductivity, that it can be appropriate way to detect cracks and corrosion permeability. The method that be used in this device for detecting cracks is based on the variations of the electrical conductivity in concrete. In fact, developing in numbers and dimensions of cracks will couse to decrease in electrical coductivity.
    In this thesis, the effect of iron powder on the concrete electrical conductivity was investigated, so the electrical conductivity of concrete structures in critical locations to increase the likelihood is greater crack And thereby make the diagnosis easier and faster to take advantage of hairline cracks.
    I this study, the experiments were conducted on concrete specimens with different percentages of iron powder and different groove depths. The results obtained from these experiments shown that using of iron powder increases the electrical conductivity of the concrete, but create the groovse in the concrete specimens and also with groove's depth increasing the electrical conductivity of the specimens was decreased
  9. Keywords:
  10. Iron Powder ; Electrical Resistivity ; Electrical Conductivity ; Crack Detection ; Nondestructive Test

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