Journal articles: 'Electrical resistivity method'

1

Zainal, Muzakir, and Marwan Marwan. "A Field Survey of Soil Corrosivity Based on Electrical Resistivity Method." Journal of Aceh Physics Society 8, no. 1 (January 21, 2019): 16–21. http://dx.doi.org/10.24815/jacps.v8i1.12768.

Full text

Abstract:

Salah satu upaya mitigasi bencana yang perlu dilakukan sebelum pembangunan fasilitas pada kawasan industri yaitu kajian korositivitas tanah. Sifat korositivitas dapat menyebabkan rusaknya infrastruktur bangunan dalam ambang batas tertentu, Kajian korositivitas tanah telah dilakukan pada kawasan industri Kecamatan Julok, Kabupaten Aceh Timur dengan tujuan untuk melakukan investigasi dan pemetaan tingkat korositivitas tanah menggunakan metode resistivitas Wenner 4 pin dan perhitungan pH meter untuk tanah. Akuisisi data dilakukan dengan titik pengukuran sebanyak tujuh titik, dimana setiap titik pengukuran data terdistribusi pada lokasi yang akan digunakan untuk pembangunan industri dengan total panjang lintasan pengukuran 6 km. Hasil pengolahan data resistivitas 1D diperoleh dua jenis pelapisan tanah. Lapisan pertama lebih didominasi oleh kondisi tanah yang tidak korosif dengan nilai resistivitas 20 – 580 Ohm.m. Sedangkan lapisan kedua dapat diduga sebagai lapisan yang korosif dengan nilai resistivitas tanah 5 – 20 Ohm.m. One of the disaster mitigation that needs to be done before facilities development in industrial area is study of soil corrosivity. Within a certain threshold, this corrosivity can cause damage to building infrastructure. This research was done in the industrial area of Julok Subdistrict, East Aceh Regency with the aim of investigating and mapping the level of soil corrosion using a 4-pin Wenner resistivity method and calculating the pH for soil. Data acquisition was carried out at seven measurement point, where each measurement point is distributed at a location that will be used for industrial development with 6 km length. Inversion of resistivity data gives two type of soil layer. The first layer is more complete by non-corrosive soil conditions with resistivity values of 20 - 580 Ohm.m. While the second layer can be interpreted as a corrosive layer with a soil resistivity value of 5-20 Ohm.m. Keywords: korosi, resistivitas, wenner, pH, mitigasi bencana

APA, Harvard, Vancouver, ISO, and other styles

2

Cho, In-Ky. "Recent Trend in Electrical Resistivity Method." Journal of the Korean Society of Mineral and Energy Resources Engineers 57, no. 5 (October 1, 2020): 506–26. http://dx.doi.org/10.32390/ksmer.2020.57.5.506.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Suzuki, Minoru, and Hiromitsu Katsui. "Method for Measuring Anisotropic Electrical Resistivity." Japanese Journal of Applied Physics 51 (November 20, 2012): 123102. http://dx.doi.org/10.1143/jjap.51.123102.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Suzuki, Minoru, and Hiromitsu Katsui. "Method for Measuring Anisotropic Electrical Resistivity." Japanese Journal of Applied Physics 51, no. 12R (December 1, 2012): 123102. http://dx.doi.org/10.7567/jjap.51.123102.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Waremra, Richard S., and Philipus Betaubun. "Analysis of Electrical Properties Using the four point Probe Method." E3S Web of Conferences 73 (2018): 13019. http://dx.doi.org/10.1051/e3sconf/20187313019.

Full text

Abstract:

There has been conducted Physics research on a material, that is, monitoring electric characteristic of a material using four-point probe method. This research measures current and voltage. The result is used to determine resistivity of a material. The research uses 2 samples, that is, chalk and charcoal. The result shows the resistivity of the sample in the form of bulk (t>s) for chalk has high resistivity on voltage of 6.6 Volt. Meanwhile, resistivity on thick sheet (t<s) has high resistivity on voltage of 7 Volt. On the charcoal material, large resistivity (t>s) is in 6 Volt, and on large resistivity (t<s) is in 6.6 Volt.

APA, Harvard, Vancouver, ISO, and other styles

6

Hazreek, Z. A. M., S. Rosli, W. D. Chitral, A. Fauziah, A. T. S. Azhar, M. Aziman, and B. Ismail. "Soil Identification using Field Electrical Resistivity Method." Journal of Physics: Conference Series 622 (June 22, 2015): 012030. http://dx.doi.org/10.1088/1742-6596/622/1/012030.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Taiwo, Saheed Mayowa, Jong-Sub Lee, and Hyung-Koo Yoon. "Analytical and experimental studies to obtain electrical resistivity in a small-scaled laboratory test." GEOPHYSICS 82, no. 5 (September 1, 2017): E267—E275. http://dx.doi.org/10.1190/geo2016-0491.1.

Full text

Abstract:

Electrical resistivity surveys have been used to investigate soil behavior at the microscale, and thus they require a method for obtaining accurate electrical resistivity. The previously suggested geometric factor ignores the dimensions of the electrode due to the scale effect present in field conditions, thus necessitating a more appropriate method to capture reliable electrical resistivity for laboratory tests. Our objective is to suggest an analytical solution to obtain reliable electrical resistivity in laboratory testing. Models are verified through laboratory tests and statistical methods. The relationship between electrical resistance and electrical resistivity is analytically defined by Ohm’s law and Gauss’s flux theorem. Consequently, the underlying importance of electrode capacitance including electrode length and diameter for estimating electrical resistivity is evaluated. In addition to the electrical resistivity estimated based on Ohm’s law (EOL), capacitance based on the single-electrode model (CSM) and the multiple-electrode model (CMM), electrical resistivity based on the conventional calibration method is also addressed. Four-equally spaced electrode probe system is designed to measure the electrical resistance. The estimated electrical resistivity based on each model (EOL, CSM, CMM, and [Formula: see text]) is compared with the electrical resistivity estimated from the conductivity meter to verify the suggested models. The electrical resistivity estimated from EOL shows high reliability. Our results underline the significance of EOL model in the conversion of measured electrical resistance into electrical resistivity in laboratory tests.

APA, Harvard, Vancouver, ISO, and other styles

8

Santoso, Budy. "IDENTIFICATION OF AQUIFER USING RESISTIVITY GEOELECTRIC METHOD IN REGIONAL OF BEBANDEM, KARANG ASEM, BALI." EKSAKTA: Berkala Ilmiah Bidang MIPA 19, no. 1 (April 21, 2018): 24–34. http://dx.doi.org/10.24036/eksakta/vol19-iss1/101.

Full text

Abstract:

Bungaya Kangin Village, Bebandem District, Karangasem Regency, Bali Province consists of paddy fields and settlements, required therefore a water source / aquifer that can meet all these needs. One of the Geophysical Methods that can identify the aquifer is the Geoelectric Method. Geoelectric method used in this research is Resistivity Method. Data acquisition using Vertical Electrical Sounding (VES) and Electrical Resistivity Tomography (ERT) Methods. VES method is a method of measurement to determine the variation of resistivity vertically at one point. Electrical Resistivity Tomography (ERT) method is a method of measuring resistivity on soil surface / rock by using many electrode (51 electrode), to obtain sub-surface resistivity variation lateraly and verticaly, to obtain sub-surface image. The equipment used for geoelectric measurements is Resistivity Meter of Naniura NRD 300 Hf which has been equipped with a switchbox to adjust the displacement of 51 electrodes. Based on the resistivity modeling results, the aquifers in the study area were found in rough sandstones with resistivity values : (49 - 100) Ohm.m.

APA, Harvard, Vancouver, ISO, and other styles

9

Siddiqui, Fahad Irfan, and Syed Baharom Azahar Bin Syed Osman. "Electrical Resistivity Based Non-Destructive Testing Method for Determination of Soil’s Strength Properties." Advanced Materials Research 488-489 (March 2012): 1553–57. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.1553.

Full text

Abstract:

Precise determination of engineering properties of soil is essential for proper design and successful construction of any structure. The conventional methods for determination of engineering properties are invasive, costly and time-consuming. Electrical resistivity survey is an attractive tool for delineating subsurface properties without soil disturbance. Reliable correlations between electrical resistivity and other soil properties will enable us to characterize the subsurface soil without borehole sampling. This paper presents the preliminary results of an ongoing research on correlations of electrical resistivity with strength properties of soil. Soil investigations, field electrical resistivity survey (VES) and laboratory electrical resistivity measurements were conducted. From the data analysis, significant correlations have been obtained between resistivity and moisture content and angle of internal friction. Weaker correlations have been observed for cohesion and unit weight of soil.

APA, Harvard, Vancouver, ISO, and other styles

10

Liu, X. C. "Application of Electrical Resistance Method in study of Sic/Al Composite." Advanced Composites Letters 2, no. 2 (March 1993): 096369359300200. http://dx.doi.org/10.1177/096369359300200205.

Full text

Abstract:

In SiC/Al composite there are obvious correspondent relations between electrical resistivity and F/M interfaces change as well as Vf. Both the F/M reaction reaction and Vf can be determined by means of the composite electrical resistivity, if the resistivity is revised by a factor small than 1.

APA, Harvard, Vancouver, ISO, and other styles

11

Dong, Xiao Qiang, Xiao Hong Bai, and Yong Kang Lv. "Discussion on Application of Electrical Resistivity Method in Cemented Soil after Pollution." Advanced Materials Research 250-253 (May 2011): 188–92. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.188.

Full text

Abstract:

As a simplify and effective method , electrical resistivity has been used in geotechnical engineering. In lab the experiment simulated that cemented soil had been polluted by industrial sulphuric acid after mixing. On different age time, the variation trend among electrical resistivity of cemented soil and solution, formation factor and solution concentration were studied. The results indicated that both of electrical resistivity and formation factor have close correlations with sulphuric acid solution concentrations and pollution level of cemented soil. This shows that the electrical resistivity method are very sensitive for groundwater and cemented soil after pollution in the engineering site.

APA, Harvard, Vancouver, ISO, and other styles

12

Park, Jong Seo, Un Bong Baek, Jeong Min Kim, Seung Hoon Nahm, and Bong Young Ahn. "Degradation Evaluation of 2.25Cr-1Mo Steel Using Nondestructive Method." Key Engineering Materials 297-300 (November 2005): 1951–57. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.1951.

Full text

Abstract:

Several nondestructive evaluation methods were attempted for the estimation of the creep damage of degraded 2.25Cr-1Mo steel. The specimens of three different aging periods were prepared by an isothermal heat treatment at 430°C, 482°C, and 515°C. The effect of probe configuration on the electrical resistivity was studied. Single configuration method and dual-configuration method were utilized for measuring electrical resistivity. The electrical resistivity was determined by a standard DC four-point probe method at 24±0.5°C. Indentation test, magnetic characteristics test and ultrasonic test were carried out to investigate the correlation between the major characteristics and aging parameter. Unlike the electrical resistivity characteristics, ultrasonic attenuation coefficient and indentation characteristics did not show a relation to Larson-Miller parameter. However, a correlation between the electrical resistivity and aging parameter was identified, which allows one to estimate the extent of material degradation.

APA, Harvard, Vancouver, ISO, and other styles

13

Kazani, Ilda, Gilbert De Mey, Carla Hertleer, Jedrzej Banaszczyk, Anne Schwarz, Genti Guxho, and Lieva Van Langenhove. "Van Der Pauw method for measuring resistivities of anisotropic layers printed on textile substrates." Textile Research Journal 81, no. 20 (September 12, 2011): 2117–24. http://dx.doi.org/10.1177/0040517511416280.

Full text

Abstract:

Electrically conducting layers have been screen printed on woven textile substrates. Using the Van Der Pauw method for electrical resistivity measurements in thin layers, it was observed that the screen-printed layers showed anisotropic behavior. In order to be able to interpret the measurements correctly, a mathematical analysis of the measuring method has been established. From the experimental results one is then able to find the relation between the electrical resistivity in the warp versus the weft direction.

APA, Harvard, Vancouver, ISO, and other styles

14

Lee, Sang Kyu, Tae Jong Lee, and Hyoung Chan Kim. "Electrical Resistivity Measurements of Ultra-high Resistivity Materials by Voltmeter-ammeter Method." Journal of the Korean Society of Mineral and Energy Resources Engineers 50, no. 4 (August 1, 2013): 512–24. http://dx.doi.org/10.12972/ksmer.2013.50.4.512.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

BAEK, UN BONG, YUN-HEE LEE, HO JUN NA, SEUNG HOON NAHM, and YOUNG HYUN NAM. "A CORRELATION BETWEEN THE AGING PARAMETER AND ELECTRICAL RESISTIVITY FOR THE DEGRADED 9 CR STEEL." International Journal of Modern Physics B 24, no. 15n16 (June 30, 2010): 2441–46. http://dx.doi.org/10.1142/s0217979210065064.

Full text

Abstract:

It is advantageous to use a non-destructive evaluation (NDE) method to assess the mechanical properties of materials since conventional methods are time-consuming and usually require sampling from the material or component. In this study, an electrical resistivity method was attempted for the estimation of the creep damage of degraded 9 Cr steel. The specimens with six different kinds of aging periods were prepared by an isothermal heat treatment at 690 °C. The electrical resistivity was determined by a standard DC four-point probe method at 24±0.5 °C. The home-made probe station and Burster 2304 were utilized for the resistance measurement. A correlation between the measured electrical resistivity and the tensile properties was studied. The electrical resistivity showed a declining tendency with the increase of aging time because the electrical resistivity is strongly dependent on the microstructural changes. A correlation between the electrical resistivity and aging parameter was established, which allows one to estimate the material degradation of 9 Cr steel.

APA, Harvard, Vancouver, ISO, and other styles

16

Amidu, Sikiru A., and John A. Dunbar. "An evaluation of the electrical-resistivity method for water-reservoir salinity studies." GEOPHYSICS 73, no. 4 (July 2008): G39—G49. http://dx.doi.org/10.1190/1.2938994.

Full text

Abstract:

An important potential application of the electrical-resistivity method occurs in salinity studies of lakes and water reservoirs. However, uncertainty exists because there is a problem of equivalence in resistivity data interpretation and because the resistivity variation in the water layer in reservoirs is subtle (contrasts of a factor of two) and changes over short intervals of time (typically in hours or days). We carry out numerical modeling and inversion of synthetic data and field resistivity data from Lake Whitney, Texas, U.S.A., to examine how accurately resistivity in the water column in reservoirs can be determined using the electrical-resistivity method. Our objective is to advance the method as a tool in limnologic research for mapping freshwater zones in impacted lakes and water reservoirs. The simulated freshwater target in the synthetic data effectively is realized from the inversion with root-mean-square (rms) error less than 10%. However, the resolutionof the inverted sections decreases with increasing noise. Inversions of the field apparent-resistivity data from three profiles in the lake, computed using estimated optimization parameters from the synthetic study, reveal the possible pattern of salinity distributions in the reservoir. For unconstrained inversion schemes, comparisons of the inverted and independently measured in situ water electrical-conductivity data yield an average rms error of 10.8%. This error value is reduced to approximately 5% with inclusions of a priori information on water resistivity in the inversion scheme. We observe an inverse relationship between error level and number of constraints on water resistivity. In general, results show that the electrical-resistivity method is a viable tool for mapping salinity variations in reservoirs. However, good data quality and inclusion of measured water conductivity as constraints in the inversion schemes are important to enhance accuracy of the inversion results.

APA, Harvard, Vancouver, ISO, and other styles

17

Gavrilov, V. A. "Method for continuous monitoring of electrical rock resistivity." Seismic Instruments 50, no. 3 (July 2014): 196–205. http://dx.doi.org/10.3103/s0747923914030062.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Chiang, Chih-Wen, Tada-nori Goto, Chien-Chih Chen, and Shu-Kun Hsu. "Efficiency of a Marine Towed Electrical Resistivity Method." Terrestrial, Atmospheric and Oceanic Sciences 22, no. 4 (2011): 443. http://dx.doi.org/10.3319/tao.2011.02.16.01(t).

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Jaśkiewicz, P. "Method to Study Crystallization Kinetics by Electrical Resistivity." Materials Science Forum 269-272 (January 1998): 743–48. http://dx.doi.org/10.4028/www.scientific.net/msf.269-272.743.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Jia, Zhuo, and Jian Min Zhang. "The Application of High-Density Resistivity Method to the Evaluation on the Stability of Gongchangling Open Pit's Slope." Applied Mechanics and Materials 686 (October 2014): 327–32. http://dx.doi.org/10.4028/www.scientific.net/amm.686.327.

Full text

Abstract:

High-density resistivity method is a new, efficient electrical prospecting method, which can complete a two-dimensional (vertical and horizontal) prospecting process, possesses certain imaging functions for the geo-electric structure, and integrates electric profiling method with electric sounding method together. In this paper, the basic principle, data processing, and result explanation and inference of high-density resistivity method are introduced by taking the application of high-density resistivity method to the prospecting project in the slope of Gongchangling Open Pit, Liaoyang. The result of the prospecting result map analysis showed that the prospecting result was basically in line with the actual situation and proved the great significance of high-density resistivity method to the evaluation on the slope stability of Gongchangling open pit.

APA, Harvard, Vancouver, ISO, and other styles

21

R.I, Obaro, Agbalajobi S.A, and Adio O. "HYDROGEOPHYSICAL INVESTIGATION USING ELECTRICAL RESISTIVITY METHOD IN TANKE ILORIN, KWARA STATE." Earth Sciences Pakistan 4, no. 2 (August 4, 2020): 65–69. http://dx.doi.org/10.26480/esp.02.2020.65.69.

Full text

Abstract:

Geophysical investigation using electrical sounding technique was carried out in Tanke community Ilorin, in order to characterize or explore ground water potential. The top soil resistivity values vary from 68.1Ωm to 65.1Ωm and thickness varying between 1.7m to 9.9m. The second layer resistivity values varies from 32.9Ωm to 651.1Ωm and the thickness vary from 2.9m to 12.7m.The third layer is the weathered basement with resistivity and thickness values varying between 22.6Ωm to 9562.6Ωm and 7.8m to 51.1m.The fourth layer is the partly weathered and fractured basement with resistivity and thickness values varying between 101Ωm to 2100Ωm and 80.1m to 124m while the fifth layer is apparently fresh basement whose resistivity values vary from 154.9Ωm to 7130Ωm with an infinite depth. The study further reveal VES 3, 4, and 5 as productive fractures within the weathered basement while other VES points are not productive.

APA, Harvard, Vancouver, ISO, and other styles

22

He, Jiahuan, Min Li, Keming Zhou, Li Zeng, Nong Li, Yu Yang, Dan Xiao, and Mei Huang. "Radial resistivity measurement method for cylindrical core samples." Interpretation 8, no. 4 (November 1, 2020): T1071—T1080. http://dx.doi.org/10.1190/int-2019-0213.1.

Full text

Abstract:

Electrical resistivity is one of the fundamental physical properties of rocks, and its relationship with fluid saturation is widely used in reservoir evaluation. The interpretation of electrical logs usually relies on the results of rock resistivity tests of cores in the laboratory. In the laboratory, core samples are commonly cut into cylinders, and the resistivity is measured along the axial direction. To determine the rock resistivity along different directions, samples are cut into cubes and tested along three perpendicular directions to obtain resistivity data. The expensive and complicated preparation process of cubic samples and the custom holder requirements limit the use of these tests. We have analyzed the advantages and disadvantages of rock resistivity measurements of cylindrical and cubic samples. To overcome the abovementioned difficulties, we develop a core holder for radial resistivity measurements and a radial resistivity measurement method for cylindrical samples. Based on the conformal transformation of the complex variable function theory, we establish a mathematical model of radial resistivity. We develop a measurement method of radial resistivity according to the mathematical model and verify this approach with isotropic cores. The theoretical calculation results agree with the experimental results. With the radial resistivity measurement method, we effectively test the resistivity anisotropy of shale. This method has more advantages than existing methods in terms of the sample preparation and realization of various displacement levels and angles. Hence, the proposed method can be widely used.

APA, Harvard, Vancouver, ISO, and other styles

23

Adekoya, S. A., H. T. Oladunjoye, J. O. Coker, and O. A. Adenuga. "Identification of lithological units using geo-electrical method, Olabisi Onabanjo University Campus, Southwestern Nigeria." Scientia Africana 20, no. 1 (April 23, 2021): 171–82. http://dx.doi.org/10.4314/sa.v20i1.15.

Full text

Abstract:

The study presented the results obtained from estimation of the depth to the bsement bedrock (overburden thickness) in Olabisi Onabanjo University, Ago-Iwoye using two configurations of electrical resistivity methods. The study was aimed to delineate the stratigraphy and thicknesses of the subsurface layer present in the study area for comprehensive study of the lithostratigraphic information of the area. Vertical Electrical Sounding (VES) and 2-D Horizontal Electrical Profiling (HEP) techniques were used to obtain 1-D and 2-D subsurface resistivity images of the study area. The VES data were plotted manually on the Bi-log graph. The curve obtained was partially curve – matched to obtain the layer resistivities and thicknesses for further iteration. The 2-D resistivity imaging data were analyzed and processed to obtain the inverted (true) resistivity image. From the results, five (5) VES type curves weredelineated. These includes H, HA, QH and KH type. The geoelectric sections and 2-D resistivity images showed three to four geoelectric layers. These layers are topsoil/laterite, weathered basement, partly weathered/fractured basement and fresh basement. The study showed that materials with resistivity values that ranged between 10 and 298 Ωm and 152 and 589 Ωm representing clayey weathered layer and partly weathered/fractured basement were delineated beneath some sounding points. The clayey and weathered layer are indicative of soil formations that are inimical to foundation of civil engineering structure. Likewise, they can serve as reservoir for groundwater potential (if the porosity and permeability are high). Due to this, detailed lithostratigraphic evaluation through petrophysical analysis is encouraged for the purpose of mapping and correlation of the rock units before embarking on any engineering construction in the study area. The study concludes in providing assistance to subsequent research on the stratigraphic related studies in the area. Keywords: Geo-electric , Stratigraphy, Lithology, Layer,

APA, Harvard, Vancouver, ISO, and other styles

24

Wychowaniak, Dorota, Łukasz Zawadzki, and Mariusz Lech. "Application of column tests and electrical resistivity methods for leachate transport monitoring." Annals of Warsaw University of Life Sciences, Land Reclamation 47, no. 3 (September 1, 2015): 237–47. http://dx.doi.org/10.1515/sggw-2015-0028.

Full text

Abstract:

Abstract Development of the human civilization leads to the pollution of environment. One of the contamination which are a real threat to soil and groundwater are leachates from landfills. In this paper the solute transport through soil was considered. For this purpose, the laboratory column tests of chlorides tracer and leachates transport on two soil samples have been carried out. Furthermore, the electrical resistivity method was applied as auxiliary tool to follow the movements of solute through the soil column what allowed to compare between the results obtained with column test method and electrical resistivity measurements. Breakthrough curves obtained by conductivity and resistivity methods represents similar trends which leads to the conclusion about the suitability of electrical resistivity methods for contamination transport monitoring in soil-water systems.

APA, Harvard, Vancouver, ISO, and other styles

25

Zawadzki, Łukasz, Dorota Wychowaniak, and Mariusz Lech. "Electrical resistivity methods for landfill monitoring." Annals of Warsaw University of Life Sciences – SGGW. Land Reclamation 50, no. 2 (June 1, 2018): 183–93. http://dx.doi.org/10.2478/sggw-2018-0015.

Full text

Abstract:

Abstract Every single investment affects the natural environment, and that is why it is so important to eliminate nuisance it could cause. Extremely harmful effect on environment or human health could be expected from waste treatment facilities. One of the kinds of contamination which is a real threat to soil and water environment are leachates from landfills. They contain random chemical composition and can migrate from landfill through soil water flux leading to environmental pollution and degradation of groundwater. This paper focuses on the use of geophysical methods to assess migration of pollutants from the landfill through the subsoil. The laboratory tests of solute transport have been conducted on three soil samples from Łubna site to simulate the contamination flow. Migration of leachates through soil samples was controlled using the column test and electrical resistivity measurements which allow to com pare the results obtained with the standard column test method and electrical resistivity measurements. It leads to the conclusion that electrical resistivity methods for contamination transport monitoring in soil–water systems are suitable. Furthermore, field electrical resistivity tomography have been used for monitoring of the vertical sealing system in Łubna landfill.

APA, Harvard, Vancouver, ISO, and other styles

26

Hou, Dongyang, Guoqiang Xue, Nannan Zhou, Yiming He, and Wen Chen. "Comparison between Different Apparent Resistivity Definitions of CSAMT." Journal of Environmental and Engineering Geophysics 24, no. 1 (March 2019): 119–27. http://dx.doi.org/10.2113/jeeg24.1.119.

Full text

Abstract:

Controlled source audio-frequency magnetotelluric (CSAMT) is typically used to obtain data regarding Cagniard resistivity by calculating the ratio between the electric field and magnetic field. However, noise conditions tend to provide different influences on the electrical and magnetic field component data. Therefore, it has become necessary to develop alternative methods to define apparent resistivity using suitable component data. In addition to the traditional Cagniard resistivity, the conventional single-component and modified single-component apparent resistivity methods have been proposed. In this research we discuss those three different apparent resistivity definitions from the aspects of theoretical formula, applicability, and calculation results of a synthetic model. We find that the modified single-component apparent resistivity method can be successfully used to achieve higher data quality nearer the source, thereby improving the exploration precision. Finally, a case study is conducted to verify our results, which show that the modified apparent resistivity method has the ability to effectively reflect the geoelectric profiling information.

APA, Harvard, Vancouver, ISO, and other styles

27

Oshima, Minoru, and Kenji Yoshino. "Electrical Properties of Fluorine Doped Tin Dioxide Film Grown by Spray Method." Materials Science Forum 725 (July 2012): 281–84. http://dx.doi.org/10.4028/www.scientific.net/msf.725.281.

Full text

Abstract:

Low resistivity, fluorine-doped tin dioxide thin films were deposited on glass substrates by spray pyrolysis. These films were prepared with different F-doping concentrations from 0 to 33 mol%. The structure of these films was investigated by X-ray diffraction and the surface morphology by Scanning Electron Microscopy. Sample compositions were evaluated using X-ray Photoemission Spectroscopy. According to these results, the films were all polycrystalline with tetragonal crystal structures. Hall measurements were used to probe the dependence of the resistivity on temperature for un-doped SnO2 and F-doped SnO2. The resistivity of un-doped SnO2 slightly increased with increasing temperature. Conversely, the resistivity of F-doped SnO2 slightly decreased with increasing temperature.

APA, Harvard, Vancouver, ISO, and other styles

28

Cao, Zhiguo, Lian Xiang, Erxing Peng, and Kai Li. "Experimental Study on Electrical Resistivity of Cement-Stabilized Lead-Contaminated Soils." Advances in Civil Engineering 2018 (August 27, 2018): 1–11. http://dx.doi.org/10.1155/2018/4628784.

Full text

Abstract:

Geotechnical applications based on soil resistivity measurement are becoming more popular in recent years. In order to explore the potential application of the electrical resistivity method in stabilization/solidification of contaminated soils, two kinds of lead-contaminated soils stabilized with cement were prepared, and the electrical resistivity and unconfined compressive strength of specimens after curing for various periods were measured. The test results show that a high lead content leads to a low value of electrical resistivity of cement-stabilized soils, and increasing cement content and curing time result in a significant increase in electrical resistivity. The reduction in porosity and degree of saturation, as a result of the cement hydration process, leads to an increase in electrical resistivity. The ratio of porosity-lead content/cement content-curing time, combining together the effect of lead content, cement content, curing time, and porosity on electrical resistivity of stabilized soils, can be used as a fundamental parameter to assess electrical resistivity of cement-stabilized lead-contaminated soils. Archie’s law can be extended to apply to cement-stabilized lead-contaminated soils by using this ratio, replacing the porosity. The new resistivity formula obtained in this paper is just empirical. There is a power function correlation between unconfined compressive strength and electrical resistivity of lead-contaminated soils stabilized with cement. Electrical resistivity measurement can be used as an economical and time-effective method to assess the quality of cement-stabilized lead-contaminated soils in practice.

APA, Harvard, Vancouver, ISO, and other styles

29

Zainal Abidin, Mohd Hazreek, Rosli Saad, Devapriya Chitral Wijeyesekera, Fauziah Ahmad, and Nur Azwin Ismail. "The Influence of Electrical Resistivity Array on its Soil Electrical Resistivity Value." Applied Mechanics and Materials 510 (February 2014): 185–92. http://dx.doi.org/10.4028/www.scientific.net/amm.510.185.

Full text

Abstract:

Electrical resistivity technique has become a popular alternative tool by the geotechnical engineers in subsurface investigation. This study presents the influence of soil electrical resistivity value (ERV) due to the different types of electrical resistivity array used in practice. The dissimilarity of ERV was become a popular debate by the engineers which posses less fundamental knowledge in this area. In the past, the theory of electrical resistivity technique was less being discovered by the engineer which creates lots of black boxes during the utilization of electrical resistivity method (ERM) in engineering purposes. Hence, the result which produced from the ERM was difficult to deliver in a sound of definitive ways due to lack of knowledge and experienced of most engineers. Hence, this study presents the influence of soil ERV due to the different types of array used with particular reference to as Dipole-dipole and Pole-dipole. A line of electrical resistivity imaging was performed on small embankment of sandy and lateritic soil with different types of array using ABEM SAS (4000) equipment. Three in line of soil samples were tested for moisture content (w) test immediately after the electrical resistivity data acquisition was completely measured. Moreover, particle size distribution test also was performed for all soil samples in order to support the findings. It was found that the ERV was never be the same for each types of array used even on the same particular location of the survey line. However, it was found that there was a consistent relationship between ERV and moisture content for both types of soil tested which can be represent by ERV 1/w. Hence, it was found that ERV produced was relative to the types of array used during the field measurement. Each types of array were applicable to be used in subsurface profiling and its selection was subjected to the target of interest.

APA, Harvard, Vancouver, ISO, and other styles

30

Pidlisecky, Adam, Rosemary Knight, and Eldad Haber. "Cone-based electrical resistivity tomography." GEOPHYSICS 71, no. 4 (July 2006): G157—G167. http://dx.doi.org/10.1190/1.2213205.

Full text

Abstract:

Determining the 3D spatial distribution of subsurface properties is a challenging, but critical, part of managing the cleanup of contaminated sites. We have developed a minimally invasive technology that can provide information about the 3D distribution of electrical conductivity. The technique, cone-based electrical resistivity tomography (C-bert), integrates resistivity tomography with cone-penetration testing. Permanent current electrodes are emplaced in the subsurface and used to inject current into the subsurface region of interest. The resultant potential fields are measured using a surface reference electrode and an electrode mounted on a cone penetrometer. The standard suite of cone penetration measurements, including high-resolution resistivity logs, are also obtained and are an integral part of the C-bert method. C-bert data are inverted using an inexact Gauss-Newton algorithm to produce a 3D electrical conductivity map. A majorchallenge with the inversion is the large local perturbation around the measurement location, due to the highly conductive cone. As the cone is small with respect to the total model space, explicit modeling of the cone is cost prohibitive. We have developed a rapid method for solving the forward model which uses iteratively determined boundary conditions (IDBC). This allows us to generate a computationally feasible, preinversion correction for the cone perturbation. We assessed C-bert by performing a field test to image the conductivity structure of the Kidd 2 site near Vancouver, British Columbia. A total of nine permanent current electrodes were emplaced and five C-bert data sets were obtained, resulting in 6516 data points. These data were inverted to obtain a 3D conductivity image of the subsurface. Furthermore, we demonstrated, using a synthetic experiment, that C-bert can yield high quality electrical conductivity images in challenging field situations. We conclude that C-bert is a promising new imaging technique.

APA, Harvard, Vancouver, ISO, and other styles

31

Nahm, Seung Hoon, Kwang Min Yu, Jong Seo Park, Young Hyun Nam, Sang In Han, Jeong Min Kim, and Am Kee Kim. "Degradation Evaluation of HK-40 Steel Using Electrical Resistivity." International Journal of Modern Physics B 17, no. 08n09 (April 10, 2003): 1615–20. http://dx.doi.org/10.1142/s021797920301940x.

Full text

Abstract:

More effective nondestructive technology for the estimation on material properties has been sought. In this research, a new electrical resistivity method was attempted for the estimation of the creep damage of a degraded heater tube steel. HK40 steel specimens with five different periods of aging were prepared by an isothermal heat treatment at 1050°C and the electrical resistivity was determined by a standard DC four-point probe method. The electrical resistivity at room temperature monotonously decreased with the extent of degradation of the material. It was also observed that Vickers hardness was correlated with the electrical resistivity. The microstructural changes of material during aging was examined by microscope.

APA, Harvard, Vancouver, ISO, and other styles

32

Yu, Kwang Min, Jeon Hong Kang, Han Jun Kim, Kwon Soo Han, and Je Cheon Ryu. "Uncertainty Improvements of Metallic Resistivity Measurements by the Four-Point Probe Method." Key Engineering Materials 321-323 (October 2006): 1470–74. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.1470.

Full text

Abstract:

Besides well-known destructive methods for material degradation, the electrical resistivity method has been used as one of nondestructive evaluation methods because of easy measurement. To use the method, however, careful geometrical corrections and thickness measurements are required. The high current probe assembly and accurate thickness measurement device were developed to improve overall measurement uncertainty. If dual configuration Four-Point Probe method with the developed devices is used, overall measurement uncertainty of electrical resistivity could be reduced to 0.44 % at 95 % confidence level. Proper selection of the probe spacing matched with sample thickness is very important to determine accurate electrical resistivity. When sample thickness is less than probe spacing, it is expected that dual configuration Four-Point Probe technique can be used in nondestructive evaluation of plant equipment materials.

APA, Harvard, Vancouver, ISO, and other styles

33

Shatunov, A. N., A. I. Maksimov, A. Yu Pechenkov, and I. V. Poznyak. "Method of electrical resistivity measurement for high-temperature melts." Inorganic Materials 47, no. 14 (November 20, 2011): 1579–83. http://dx.doi.org/10.1134/s0020168511140202.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Riwayat, Akhtar Izzaty, Mohd Ariff Ahmad Nazri, and Mohd Hazreek Zainal Abidin. "Application of Electrical Resistivity Method (ERM) in Groundwater Exploration." Journal of Physics: Conference Series 995 (April 2018): 012094. http://dx.doi.org/10.1088/1742-6596/995/1/012094.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Bulolo, S., E. C. Leong, and H. Abuel-Naga. "Filter paper method for suction measurement using electrical resistivity." Géotechnique Letters 11, no. 3 (September 1, 2021): 1–7. http://dx.doi.org/10.1680/jgele.20.00169.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Gong, Mingxu, and Zhaofa Zeng. "Application of electrical resistivity tomography method in archaeological excavation." IOP Conference Series: Earth and Environmental Science 660, no. 1 (February 1, 2021): 012119. http://dx.doi.org/10.1088/1755-1315/660/1/012119.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Niwas, Sri, and M. Israil. "A simple method of interpreting dipole resistivity soundings." GEOPHYSICS 52, no. 10 (October 1987): 1412–17. http://dx.doi.org/10.1190/1.1442253.

Full text

Abstract:

A computational method has been developed based on a linear relationship between apparent resistivity and the kernel function through a matrix operator. Forward modeling of dipole apparent resistivity values over a one‐dimensional layered earth model as well as the inversion of electrical sounding data can be easily accomplished using this matrix operator. For a few two‐layer, three‐layer, and four‐layer earth models, the apparent resistivity values can be calculated quickly and accurately. It is shown that the technique is adaptable to automatic interpretation in both the resistivity and the kernel domains.

APA, Harvard, Vancouver, ISO, and other styles

38

Nam, Myung Jin, David Pardo, and Carlos Torres-Verdín. "Simulation of DC dual-laterolog measurements in complex formations: A Fourier-series approach with nonorthogonal coordinates and self-adapting finite elements." GEOPHYSICS 74, no. 1 (January 2009): E31—E43. http://dx.doi.org/10.1190/1.3000681.

Full text

Abstract:

Dual laterolog (DLL) makes use of a galvanic conduction principle to focus electrical currents into rock formations, thereby minimizing shoulder and borehole effects in the measurement of formation resistivity. The tool includes two separate focusing systems: deep-sensing (LLd) and shallow-sensing modes (LLs). Laterolog current-focusing systems were designed for operation primarily in vertical boreholes penetrating horizontal layers; only recently their design has been revised for operation in deviated wells in the presence of electrical anisotropy. We simulated three-dimensional (3D) DLL measurements in dipping, invaded, and electrically anisotropic formations and appraised the corresponding effects on apparent resistivity logs. Simulations were performed by combining the use of a Fourier-series expansion in a nonorthogonal system of coordinates with an existing 2D goal-oriented, higher-order, and self-adaptive finite-element method. This numerical algorithm yields accurate solutions in limited CPU time because only a few Fourier modes are needed to simulate practical applications. For the calculation of focused currents, we introduced an embedded postprocessing method that incorporates a synthetic focusing principle to compute current intensities at each iterative step of optimal mesh refinements. Our numerical method accurately simulates 3D DLL measurements in rock formations that exhibit extreme contrasts of electrical resistivity. Simulations indicate that LLs resistivity logs are more sensitive to both invaded and anisotropic layers than LLd resistivity logs. In deviated wells, shoulder-bed effects on apparent resistivity logs increase with an increase of dip angle, and are emphasized across thin conductive layers. Electrical anisotropy effects on apparent resistivity logs increase substantially with dip angle.

APA, Harvard, Vancouver, ISO, and other styles

39

Panta, GP, and DP Subedi. "Electrical characterization of aluminum (Al) thin films measured by using four- point probe method." Kathmandu University Journal of Science, Engineering and Technology 8, no. 2 (January 3, 2013): 31–36. http://dx.doi.org/10.3126/kuset.v8i2.7322.

Full text

Abstract:

This paper reports the results of electrical characterization of aluminum thin films. Uniform Al thin films were deposited by physical vapor deposition (PVD) technique on glass substrates. The electrical resistivity of the films as a function of film thickness was studied. These parameters have been measured by four-point probe method. The electrical resistivity was obtained by the measurement of current (in mA) and voltage in (mV) through the probe. The results showed that resistivity of the film decreases linearly with the film thickness in the range of the thickness studied in this work. Kathmandu University Journal of Science, Engineering and Technology Vol. 8, No. II, December, 2012, 31-36 DOI: http://dx.doi.org/10.3126/kuset.v8i2.7322

APA, Harvard, Vancouver, ISO, and other styles

40

Silva Filho, Antonio Marcelino, Carlos Leandro Borges Silva, Marco Antonio Assfalk Oliveira, Thyago Gumeratto Pires, Aylton José Alves, Wesley Pacheco Calixto, and Marcelo Gonçalves Narciso. "Geoelectric method applied in correlation between physical characteristics and electrical properties of the soil." Transactions on Environment and Electrical Engineering 2, no. 2 (July 5, 2017): 37. http://dx.doi.org/10.22149/teee.v2i2.85.

Full text

Abstract:

This paper presents the study of the relationship between electrical properties and physical characteristics of the soil. Measures of apparent electrical resistivity of the soil were made for different types of soil, varying moisture content gradually while maintaining a constant compaction, and then varying the compaction and relating it to a constant humidity. Development of a correlation surface is proposed in order to identify granulometry of the soil from moisture and compaction measurements. For the study of spatial variability, two areas were chosen to allow the change of moisture content and compaction in order to verify the measurement capacity of apparent electrical resistivity of the soil as methodology to identify change in soil dynamics. Results obtained show correlations among apparent electrical resistivity of the soil, moisture, soil compaction and clay content.

APA, Harvard, Vancouver, ISO, and other styles

41

Hesse, A., A. Jolivet, and A. Tabbagh. "New prospects in shallow depth electrical surveying for archaeological and pedological applications." GEOPHYSICS 51, no. 3 (March 1986): 585–94. http://dx.doi.org/10.1190/1.1442113.

Full text

Abstract:

Three different improvements in the galvanic method of shallow‐depth electrical prospecting need to be made. (1) A better definition of the electrode array(s) is needed in order to reduce the “apparent anisotropy” effect and increase the depth of investigation; the square array is one solution. (2) A resistivity meter that can make measurements very rapidly needs to be built. The rapid decrease of the induced electric field for small electrode distances makes such measurements possible. We propose a resistivity meter with an 8 ms measurement time. (3) The electrode‐ground contact problem needs to be solved by using a resistivity meter that can endure high contact resistances. As an alternative solution, we also propose a new type of electrode: a liquid jet one. These improvements could make the resistivity method very attractive and competitive, and open large future developments for the method.

APA, Harvard, Vancouver, ISO, and other styles

42

Alekseev, Ivan, and Evgeny Abakumov. "Assessment of Soil Electrical Properties in Selected Agricultural Soils of Puchuncaví, Central Chile." Agriculture (Pol'nohospodárstvo) 66, no. 2 (July 1, 2020): 67–73. http://dx.doi.org/10.2478/agri-2020-0007.

Full text

Abstract:

AbstractPrecision agriculture requires a wide sampling procedure to determine the spatial variability of soil properties for adequate assessment of soil state and appropriate recommendations. Electrical geophysical methods (i.e. vertical electrical resistivity sounding) allow performing rapid measurement of soil electrical properties directly from the soil surface to any depth without any mechanical disturbance of soil cover. Soil electrical properties are linked with many soil properties and could improve the quality and spatial coverage of soil surveys. The results obtained in our study using vertical electrical resistivity sounding confirmed the hypothesis of a high correlation between electrical resistivity and such soil properties as carbon and nitrogen content and silt content. The highest correlation (r > 0.9) was found for electrical resistivity and carbon content. It was also confirmed that significant correlations between electrical resistivity and soil properties are found mainly when soil properties are highly ranged. Perspectives for the applied method lie at the relationship between electrical resistivity and soil properties, such as texture class, clay content, carbon content, and cation exchange capacity. The results obtained in this work could be useful for complex precision agriculture, creating maps of agricultural soils, adequate methods of plant growth, and other issues of precision and conventional agriculture.

APA, Harvard, Vancouver, ISO, and other styles

43

Cozzolino, Marilena, Paolo Mauriello, and Domenico Patella. "An Extension of the Data-Adaptive Probability-Based Electrical Resistivity Tomography Inversion Method (E-PERTI)." Geosciences 10, no. 10 (September 23, 2020): 380. http://dx.doi.org/10.3390/geosciences10100380.

Full text

Abstract:

About a decade ago, the PERTI algorithm was launched as a tool for a data-adaptive probability-based analysis of electrical resistivity tomography datasets. It proved to be an easy and versatile inversion method providing estimates of the resistivity values within a surveyed volume as weighted averages of the whole apparent resistivity dataset. In this paper, with the aim of improving the interpretative process, the PERTI method is extended by exploiting some peculiar aspects of the general theory of probability. Bernoulli’s conceptual scheme is assumed to comply with any resistivity dataset, which allows a multiplicity of mutually independent subsets to be extracted and analysed singularly. A standard least squares procedure is at last adopted for the statistical determination of the model resistivity at each point of the surveyed volume as the slope of a linear equation that relates the multiplicity of the resistivity estimates from the extracted data subsets. A 2D synthetic test and a field apparent resistivity dataset collected for archaeological purposes are discussed using the new extended PERTI (E-PERTI) approach. The comparison with the results from the original PERTI shows that by the E-PERTI approach a significantly greater robustness against noise can be achieved, besides a general optimisation of the estimates of the most probable resistivity values.

APA, Harvard, Vancouver, ISO, and other styles

44

Reza, AHM Selim, Quamrul Hasan Mazumder, and Mushfique Ahmed. "Geo-electrical Resistivity Survey in the High Barind for the Delineation of Aquifer Geometry." Rajshahi University Journal of Science 39 (October 9, 2013): 27–37. http://dx.doi.org/10.3329/rujs.v39i0.16540.

Full text

Abstract:

Geo-electrical resistivity techniques have been employed in the High Barind as a reconnaissance investigation for the subsurface lithology. Out of 13 upazillas, comprising the Barind tract, Sapahar and Porsha Upazillas, situated in the High Barind are badly affected by water shortage. Vertical electrical soundings (VES) were executed using Schlumberger configuration in different areas taking the current electrode separation up to 170 meters. Direct method technique was employed to evaluate the geo-electric layer such as resistivity and thickness of the discrete layers. The results of the resistivity survey give the subsurface information consisting of three to four layers. The results of geo-electric sounding have been compared with the geological section wherever available. DOI: http://dx.doi.org/10.3329/rujs.v39i0.16540 Rajshahi University J. of Sci. 39, 27-37 (2011)

APA, Harvard, Vancouver, ISO, and other styles

45

Taufiq, Taufiq, Maharani Maharani, and H. D. Mega. "Application of Vertical Electrical Sounding (VES) Resistivity Method to determine a well recommendation point at deep-groundwater exploitation." Journal of Earth and Marine Technology (JEMT) 1, no. 2 (March 31, 2021): 8–13. http://dx.doi.org/10.31284/j.jemt.2021.v2i1.1481.

Full text

Abstract:

The demand of fresh water to develop of life community is very important, where almost all construction activities is required a water such as irrigating rice fields, building infrastructure, and to daily consumption. To obtain a good quality of groundwater, several parameter must be specified such as the depth of groundwater, thickness of the source, and resistivity value of rock. In this case, we try to applied Vertical Electrical Sounding (VES) resistivity method with Schlumberger configuration on one of Pamsimas Project to answer that parameter. VES Resistivity method is one of the active methods in geophysical study based on electrical properties of the subsurface rock by injecting electric current (I) into the earth and record the potential difference (?V) produced to the surface. From the results of current and potential difference measurements for each electrode spacing (AB/2) different then be lowered resistivity variations in the value of each layer below the measuring point (sounding points). After the acquisition on 3 points at Pandansari Village (PS-01, PS-02, PS-03), we get the result on PS-01, the water layer is indicated on the depth 60-80 meters with resistivity values equal than 36.7-50 ?m. On PS-02, the water layer is indicated on the depth 50-100 meters with resistivity values equal than 18.7-40 ?m. On PS-03, the water layer is indicated on the depth 30-60 meters with resistivity values equal than 52.8-70 ?m. Afterthat, we run 2D-pseudosection to know the distribution of groundwater layer in subsurface and get the thickness of groundwater is 20-50 meter with depth 40-80 meter. Based on this result, the PS-01 is the best point to make a well-exploitation on South Pandansari Pamsimas Project.

APA, Harvard, Vancouver, ISO, and other styles

46

Zhou, Yu, Guoyu Li, Wei Ma, Dun Chen, Fei Wang, Yuncheng Mao, Qingsong Du, Jun Zhang, and Liyun Tang. "Experimental Study on Electric Resistivity Characteristics of Compacted Loess under Different Loads and Drying-Wetting Cycles." Advances in Civil Engineering 2021 (January 28, 2021): 1–12. http://dx.doi.org/10.1155/2021/6672430.

Full text

Abstract:

Densely compacted loess foundations of many man-made infrastructures are often exposed to various loads and extreme weathering processes (e.g., drying-wetting cycles), which significantly deteriorate their mechanical properties. Traditional methods applied to characterize soil engineering properties are primarily based on visual inspections, point sensors, or destructive approaches, the results of which often have relatively high costs and cannot provide large-area coverage. The electrical resistivity method is a reasonable alternative that provides a nondestructive, sensitive, and continuous evaluation of the soil physical properties. Thus, the relationships between electrical resistivity and soil strength should be understood, particularly for scenarios in which soils undergo significant loads and cycles of drying and wetting. In this study, a suite of laboratory tests simulating loads (consolidation tests, unconfined compression tests, and uniaxial cyclic unloading-reloading tests) and seasonal field conditions (drying-wetting cycle tests) were conducted to quantitatively assess their deterioration effects on the geophysical and geotechnical properties of compacted loess. The experimental results indicated that electric resistivity decreases with the increase in stress and then approaches a stable value after the stress becomes 200 kPa. During the uniaxial compression process, the electric resistivity corresponds to both the stress and strain of loess in real-time. The electrical resistivity of loess reflects plastic damage under uniaxial unloading-reloading tests, but it is deficient in representing the dissipated energy of loess. The electrical resistivity of loess samples increases as the number of drying-wetting cycles increases but decreases with increasing cycle numbers after stabilization under consolidation load. The electrical resistivity can effectively characterize the mechanical and deformation characteristics of loess samples under loads and drying-wetting cycles, exhibiting a certain potential for long-term monitoring of soil engineering properties.

APA, Harvard, Vancouver, ISO, and other styles

47

Janerka, Krzysztof, Jan Jezierski, Marcin Stawarz, and Jan Szajnar. "Method for Resistivity Measurement of Grainy Carbon and Graphite Materials." Materials 12, no. 4 (February 21, 2019): 648. http://dx.doi.org/10.3390/ma12040648.

Full text

Abstract:

The article presents the issue of electrical resistivity measurement of carbon materials. The device that was developed by the authors is described and is the subject of a Polish patent. The innovative approach of the setup is based on the possibility of measuring the resistivity of grainy (powdered, dusty) materials without having to conduct their preliminary pressing. The material that is to be analyzed is placed inside the chamber made of electrically non-conducting material. The sample is then compacted with pneumatically driven pistons and the compaction force can be controlled by the air pressure. The device as proposed by the authors works at a pressure of 900 kPa, which is equal to the compaction force of 1.2 kN. Resistivity is calculated on the basis of the voltage drop recorded on the sample length. The research covers the analysis of the influence of carbon material grade and compaction force on the resistivity value. It was stated that the resistivity of the graphite materials that were analyzed here changed within the range of 43–172 µm: petroleum coke—360–780 µm; the anthracite—1900–3900 µm. The experimental method presented here can be used whenever carbon materials are present in the form of grains.

APA, Harvard, Vancouver, ISO, and other styles

48

Gu, Jia Chang, Xiao Tao Han, and Qi Chen. "Correlation between Electrical Resistivity and the Structural Evolution of Zr-Based Bulk Amorphous Alloys." Materials Science Forum 849 (March 2016): 85–90. http://dx.doi.org/10.4028/www.scientific.net/msf.849.85.

Full text

Abstract:

The electrical resistivity of three kinds of Zr-based bulk amorphous alloys as a function of continuous increasing temperature was measured by the direct current four-probe method. Combining with Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analysis, the correlation between the electrical resistivity and structural evolution of these amorphous alloys has been demonstrated. The experimental results showed that three amorphous alloys all had a small negative temperature coefficient of resistivity (TCR<-10-4 K-1) before crystallization. Little change of the electrical resistivity related with the glass transition process was observed, while the electrical resistivity decreased sharply once the crystallization occurred. The onset of crystallization determined by the electrical resistivity measurement was far lower than that by DSC. The different stages of crystallization behavior could be evidently identified by the change of the electrical resistivity.

APA, Harvard, Vancouver, ISO, and other styles

49

Listanti, Sinta Nur Rizqi, Darsono Darsono, and Yusep Muslih Purwana. "A Comparison between Drilling and Standard Penetration Test (SPT) Data to the Electrical Resistivity Sounding with Schlumberger Configuration in UNS Area." INDONESIAN JOURNAL OF APPLIED PHYSICS 8, no. 2 (November 23, 2018): 67. http://dx.doi.org/10.13057/ijap.v8i2.17962.

Full text

Abstract:

<p>The geophysics test using electrical resistivity method has been conducted in the area of UNS Campus to indicate the lithological of subsurface. This method is categorized as a Non-Destructive Test (NDT) due to the data acquisition is done at the ground level and no destruction during the test, which is more advantageous than destructive method such as drilling and SPT test. This study was performed with Schlumberger configuration in three location by electrical resistivity sounding. The acquisition data uses Resistivity meter OYO 2119 McOHM-EL with the track length is 100 m, while the data processing use IPI2Win to get a logarithmic graph between distance and resistivity and Origin to obtain graphic of resistivity and SPT. The result of this study indicates that electrical resistivity has a good correlation with SPT data. The electrical resistivity graph shows a linear increase along with increment of the depth, which is similar to the SPT graph. The slope difference at the first location is 2.44±1,197, the second location is 2.028±0.822, and the third location is 0.622±0.735.</p>

APA, Harvard, Vancouver, ISO, and other styles

50

Sastrawan, Febrian. "Determining Groundwater Potential Using Vertical Electrical Sounding Method In Manggar, Balikpapan City, Indonesia." Journal of Geoscience, Engineering, Environment, and Technology 5, no. 4 (December 23, 2020): 239–44. http://dx.doi.org/10.25299/jgeet.2020.5.4.5495.

Full text

Abstract:

Clean water requirement in Manggar Urban Village of Balikpapan City is rising along with population growth. The main source of clean water that can be used is ground water in the aquifer layer. The Study of groundwater potential was conducted using vertical electrical sounding (VES) method to determine the presence and types of aquifer layers. The measurements along four measurement points revealed four aquifers buried in depth ranging from 48 to 53 m below the surface. The layer which is potential to be an aquifer is a sand layer with moderate-sized grain. The resistivity values for sand layer at each measurement point vary from 221 to 281Ωm. The estimation of sand to be an aquifer layer was supported by the calculation of formation factors. The calculation was based on the ratio of resistivity values from pore-filling water and resistivity values from water-saturated rocks layer. The aquifer revealed in this study is categorized as unconfined aquifer because the upper layer is restricted by sandy clay. The resistivity values vary from 12.8 to 35.4 Ωm which behaved as an aquitard layer. However, low resistivity values between 9.6 to 20 Ωm are detected under the aquifer layer. The layer is identified as clay which behaved as an impermeable layer or aquiclude.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Electrical resistivity method'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles