International Journal of Scientific Engineering and Science Volume 3, Issue 9, pp. 36-39, 2019. ISSN (Online): 2456-7361 36 http://ijses.com/ All rights reserved Enhance Utilization of Bentonite, Lime and Waste Buildings to Increase the Land Capacity Tropical Darlina Tanjung Lecture Program Study Civil Engineering, Universitas Islam Sumatera Utara Sisingamaraja Street, Teladan Medan, North Sumatera Indonesia Abstract— Tropical soils are generally dominated by clay minerals which have a capacity Cation exchange (CEC) and low electric charges resulting in sortition capacity low to soil electrolytes (especially ground water). Flow ability the electron charge that comes from a lightning strike becomes low and resistant soil type becomes high. This has an impact on the ability to flow through the load electrons from lightning strikes become low. For this reason treatment is needed of land that will be used as a grounding media in a way addition of additives. This study uses grounding media between soil mixtures (T) with debris (P), soil with bentonite (B), and soil with lime (K). Each mixture (T: P), (T: B), (T: K), made with a concentration of 25:75, 50:50, 75:25 and 100% land as a control. Distance between electrode implements between 1 meter treatment group, and different ground dimensions. The measurement method used is a three-point method with using a single ground rod electrode. The results showed the best response to decline successive resistance is in the soil mixture with debris, then followed by soil with lime and soil with bentonite. Water content effect on decreasing soil resistance. The greater the water content . Keywords— Water content, grounding media, resistance. I. INTRODUCTION Tropical land is classified as very wide distribution in the world, and in Indonesia. Generally tropical soils are dominated by clay minerals which have an exchange capacity Low cation (CEC) and low electric charge resulting in capacity very low sortation of soil electrolytes (especially ground water) moreover when dry. This means the ability to flow from the originating electron charge from lightning strikes to low too, which often lead to disaster, i.e. damage to electrolyte equipment due to induction generated by lightning strike (Induction, 2004). The danger of lightning induction is greater in densely populated settlements like urban areas that are generally impermeable to surface water infiltration. In such areas, grounding electrodes are generally frequent not effective in delivering electrons from lightning strikes because of enlargement of soil type resistance due to particularly low soil water content in the transition from the dry season to the rainy season where the frequency of lightning increased sharply while groundwater conditions were still very low. This is right with the results of research Kristantri and Kurniawati (2016), stated that the highest number of lightning strikes occurs in the transitional season, Tropical land is classified as very wide distribution in the world, and in Indonesia (Eddy, Alamsyah, Aryza, & Siahaan, 2018). Generally tropical soils are dominated by clay minerals which have an exchange capacity Low cation (CEC) and low electric charge resulting in capacity very low sorption of soil electrolytes (especially ground water) moreover when dry. This means the ability to flow from the originating electron charge from lightning strikes to low too, which often lead to disaster, i.e. damage to electrolyte equipment due to induction generated by lightning strike (Bachtiar, 2006). Anticipating lightning events is to make protection from lightning hazards, by flowing lightning currents to the earth (grounding) with the aim protect living creatures and buildings to avoid fatal damage. For this reason, a good grounding system is needed. According to General Conditions Electrical Installation or PUIL 2000 (appropriate regulations and valid until now this) the total earth resistance of the entire system must not exceed 5 ohms. It was explained that a value of 5 ohms was the maximum value or limit highest yields of grounding resistance that can still be tolerated. Values that are in the range of 0 ohms - 5 ohms are safe values of an installation earthing grounding. This value applies to the entire system and installation which has a ground (grounding) in it. For resistance areas soil type is very high, resistant to total earthing of the entire system reach 10 ohms. Addition of bentonite will result in better earthing resistance (Rabanal- Arabach, Schneider, & Cabrera, 2015). The research results of Lim, et al., (2013), prove that 30% bentonite concrete mix consistently produces the lowest grounding resistance value. Sunarto (2013), states that the addition of bentonite additives around the electrodes Earthing greatly influences the value of earthing resistance. Where with Addition of bentonite additives will produce an earth resistance value better. The decrease in the value of earthing resistance ranges between 6.96 ohms to 5.85 ohms or reduced between 15% - 90%. This behavior leads to the imagination that the magnitude of the specific electrical charge of the material Grounding is greatly affected by its ability to hold water. Pg this means the ability of the grounding material greatly affects the inside electricity or reduce the resistance of the type(Suryaputra P., Samopa, & Hindayanto, 2014). II. LITERATURE REVIEW The location of Indonesia, which is crossed by the equator, makes Indonesia climate tropical. So that Indonesia is known as a country with a lot of rain, a lot of growth Comulonimbus (Cb) clouds and lots of lightning and thunderstorms. As one of the an area that has an average Thunder Storm Days intensity pervery high year, this allows a lot of harm to happen caused by lightning strikes, which allows a lot to happen damage