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| | Abstract | | Recently, corrosion of aging water pipes has become a big social problem and the development of assessment measures for their deterioration rate is an urgent issue. Corrosion risk of pipes closely relates to the electrical resistivity of the soil around them. Conventionally, it was measured using soil samples, however, it takes much costs, time and effort because it needs excavation through the paved road. AIST has developed a high-frequency AC resistivity survey system that can directly measure the resistivity of soil around buried water pipes from the pavement surface without excavating the road. The new method to efficiently assess the corrosion risk is expected to greatly contribute to determining the priority in replacing aging water pipes. |
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