The Effect of Salt and Sulfuric Acid on the Resistivity Value of Bentonite Mixed with Calcium Carbonate Soil under DC Voltage

Pequinta Alnajua Wisyah; Bambang Anggoro Soedjarno P; Pradita Octoviandiningrum Hadi

Pequinta Alnajua Wisyah School of Electrical Engineering and Informatics, Bandung Institute of Technology, Bandung, Indonesia
Bambang Anggoro Soedjarno P School of Electrical Engineering and Informatics, Bandung Institute of Technology, Bandung, Indonesia
Pradita Octoviandiningrum Hadi School of Electrical Engineering and Informatics, Bandung Institute of Technology, Bandung, Indonesia

Keywords: bentonite, calcium carbonate, ground enhancement materials, soil resistivity, salt variation, sulfuric acid variation

Abstract

Mountainous areas are characterized by high soil resistivity, which may interfere with the grounding system and safety. Therefore, Ground Enhancement Material (GEM) is needed so that the resistivity value of the soil is following the grounding resistance standards regulated by General Electrical Installation Requirements or PUIL 2000. Bentonite as Ground Enhancement Materials (GEM) has been widely used, but studies on bentonite mixed with calcium carbonate using various stages of salts and acids for reducing soil resistivity are still few. This paper presents research conducted on bentonite mixed with calcium carbonate (CaCO3) as a test soil, with salt (NaCl) and sulfuric acid (H2SO4) under DC voltage. In this research, laboratory experiments have been carried out. From the experiments, it was found that the average resistivity value of the soil in dry conditions was 57096.39 Ωm, then there was a decrease in resistivity of 99.96% with the lowest average resistivity value being 20.9 Ωm in the application of 18% NaCl solution. Whereas in the application of 18% H2SO4 the average resistivity value is 259.6 Ωm with a resistivity reduction percentage of 99.55%. The use of NaCl is more effective in reducing soil resistivity than H2SO4.

References

[1] Siti & Pambudi Handoyo Latifah, "Surround City Development (Effect of Conversion of Agricultural Land Functions into Elite Housing)," Paradigma, vol. 02, p. 1, 2014.
[2] "Rencana Aksi Daerah Penerapan Standar Pelayanan Minimal di Kabupaten Bandung Tahun 2021 - 2026," Bupati Bandung Barat, Kabupaten Bandung Barat, Lampiran Peraturan Bupati No. 93 tahun 2021, 2021.
[3] Asep Harja, et.al, "Hydrogeophysical Study of Malabar as the Highest Mountain on the Bandung," Journal of Geology and Mineral Resources, vol. 22, pp. 223-230, November 2021.
[4] "Persyaratan Umum Instalasi Listrik 2000 (PUIL 2000)," ANSI/IEEE, SNI 04-0225-2000, 2000.
[5] Nazra Anandu, "Analysis Of The Electrical Response Of Padalarang Limestone To Current Variation Under Water Content And Chemical Content Variation For Grounding Applications," School of Electrical and Informatics Engineering, Bandung Institute of Technology, Bandung, Thesis 2022.
[6] R.Z. Sabry, et.al, "Experimental investigation on breakdown characteristics of sand, bentonite and their mixes," J. Electrostat, vol. 93, pp. 79-84, April 2018.
[7] Aizat Azmi, et.al, "The use of enhancement material in grounding system: a review," Indonesian Journal of Electrical Engineering and Computer Science, vol. 13, no. 2, pp. 453-460, February 2019.
[8] Norazman Mohamad Nor, et.al, "Characterization of Ionization Phenomena in Soils Under Fast Impulses," IEEE Transactions on Power Delivery, vol. 353 - 361, pp. 353 - 361, February 2006.
[9] Yanwar Yusup Rukmana, et. al, "Potential corrosivity of the Citarum river floodplain sediment in Karawang, West Java," Dinamika Lingkungan Indonesia, vol. 7, no. 2, pp. 62-69, Juli 2020.
[10] Zakka Izzatur Rahman Noor, "Analysis Of The Electrical Response Of Karangnunggal Bentonite To Current Variation Under Water Content And Chemical Content Variation For Grounding Applications," School of Electrical and Informatics Engineering, Bandung Institute of Technology, Bandung, Thesis 2021.
[11] Omar Faruk Murad, "Obtaining Chemical Properties through Soil Electrical Resistivity," Journal of Civil Engineering Research, vol. 2(6), pp. 120-128, 2012.