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On-site investigations on concrete resistivity - a parameter of durability calculation of reinforced concrete structures
For determination the electrolytic resistivity of concrete, resistances of realistic designed probes are measured during a one and two year period, respectively. Measurements are made with a commercially available instrument normally used for measuring earth resistances. Comparison to other usually applied methods show not only that the used method GEOHM is qualified for measuring the electrolytic resistance of concrete but also that the magnitude of measured values is realistic. To obtain electrolytic resistivities from these measurements the individual cell constant for the investigated system was derived from experimental research. A procedure to derive the cell constant k has been proposed. On-site measurements with the GEOHM can be used to validate the developed probabilistic model for the propagation stage of corrosion in reinforced concrete. Statistically described by the type of distribution (usually log normal distributed) as well as mean and standard deviation this input data can be taken to perform probabilistic based reliability calculations with regard to the propagation period. It is proposed to record the resistivities continuously (at higher frequency), a sensor recording the relative humidity and the temperature of the ambient air was already installed. Statistical analysis of records will follow. Statistically analysed data are important input data for the reliability calculations to be performed in the future.
On-site investigations on concrete resistivity - a parameter of durability calculation of reinforced concrete structures
For determination the electrolytic resistivity of concrete, resistances of realistic designed probes are measured during a one and two year period, respectively. Measurements are made with a commercially available instrument normally used for measuring earth resistances. Comparison to other usually applied methods show not only that the used method GEOHM is qualified for measuring the electrolytic resistance of concrete but also that the magnitude of measured values is realistic. To obtain electrolytic resistivities from these measurements the individual cell constant for the investigated system was derived from experimental research. A procedure to derive the cell constant k has been proposed. On-site measurements with the GEOHM can be used to validate the developed probabilistic model for the propagation stage of corrosion in reinforced concrete. Statistically described by the type of distribution (usually log normal distributed) as well as mean and standard deviation this input data can be taken to perform probabilistic based reliability calculations with regard to the propagation period. It is proposed to record the resistivities continuously (at higher frequency), a sensor recording the relative humidity and the temperature of the ambient air was already installed. Statistical analysis of records will follow. Statistically analysed data are important input data for the reliability calculations to be performed in the future.
On-site investigations on concrete resistivity - a parameter of durability calculation of reinforced concrete structures
Büteführ, M. (author) / Fischer, C. (author) / Gehlen, C. (author) / Menzel, K. (author) / Nürnberger, U. (author)
Materials and Corrosion ; 57 ; 932-939
2006
8 Seiten, 13 Bilder, 5 Tabellen, 9 Quellen
Article (Journal)
English
| British Library Online Contents | 2006
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