IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 13, Issue 1 Ver. II (Jan. - Feb. 2016), PP 07-12 www.iosrjournals.org DOI: 10.9790/1684-13120712 www.iosrjournals.org 7 | Page Electrically Conductive Concrete Formed By Using Waste Coke Proving Beneficial For Grounding. Abid Ahmad Sofi 1 , Sheikh Mohamad Iqbal 2 , Suhail Ahmad Mir 3 , Mohmmad Vekas Wani 4 , Er. Aeijaz Masoodi 5 1,2,3,4 Civil Engineering Graduate Students, IUST, Awantipora Kmr. 5 Road Research Officer, KGP Sgr. Abstract: In this research, the issues of grounding problems in transmission towers during lightening and economic concerns of communication and transmission are addressed by using of waste coke powder rich with carbon in concrete foundation of towers.In case of transmission towers the compressive strength of underground concrete foundation is of less concern but should be more conductive for providing a continuous flow path for high voltage electric current up to deeper depths safely. The coke was oven dried ground finer and sieved through 150 micron IS sieve.The finely powdered coke were added as 2%, 4%, 6%, 8%,10% and 12 % by weight of cement for M-30 mix. The concrete were tested for workability in the fresh state and concrete specimens for compressive strength, durability density and conductivity at 28 days of age and the results obtained were compared with those of normal concrete. The results concluded the permissible dosage of using coke powder as partial replacement of cement up to 10% by weight for coke particle size finer than 150 microns. This form of concrete can be called as “Cokecrete”. Keywords: Coke powder, Sustainability, Grounding, Conductivity, Concrete foundation. I. Introduction Conventional concrete is not electrically conductive. A hydrating concrete consists of pore solution and solids, including aggregates, hydrates and unhydrated cement. Conduction of electricity through concrete may take place in two ways: Electronic: Electronic conduction occurs through the motion of free electrons in the conductive media. Electrolytic: Electrolytic conduction takes place by the motion of ion ’s in the pore solution in the fresh state. Controlled conductive materials are used for controlled electrical conduction, static charge dissipation, lightning protection, and electromagnetic interference shielding in electronic, mechanical, structural, chemical applications and electrically powered transit lines. In particular, controlled resistivity ceramics, such as alumina-matrix composites containing electrically conducting particulates filler are used as substrates for handling semiconductor wafers, which require static protection [1]. It was found that Electric resistivity of the concrete is infinite as there is no conducting medium within the concrete mass for the current to flow. When a conducting material i.e, carbon based material (coke breeze), waste steel residue is mixed with ingredients of concrete ,its electrical resistivity increases upto some percentage of additive and then decreases as the continuous path for current flow is set up by steel particles [2]. Conductive concrete is a cement-based composite that contains a certain amount of electronically conductive components to attain stable and relatively high conductivity. In essence, the aggregates normally used in concrete can be largely replaced by a variety of carbon-based materials to achieve electrical conductivity in conductive concrete [3]. While the engineering properties and mixing characteristics of conductive concrete and normal concrete are comparable, conductive concrete does have other distinctive characteristics beyond its ability to conduct electricity [4]. Controlled electrical resistivity materials are typically in the form of composite materials with an electrically insulating matrix and electrically conductive discontinuous filler, which can be particulate or fibrous. The higher filler content, lower resistivity of composite. These composites include those with polymer, ceramic and cement matrices [4,5]. Compressive strength of concrete is dependent on the W/C ratio. The higher the ratio the lower is the strength. Electrical resistivity of concrete decreases almost linearly with increasing W/C ratio for a given cement content and therefore resistivity can be diagnostic of the compressive strength [6]. Approaches to improving the electrical conductivity of a concrete mix include: 1. Use of conductive aggregates such as iron ore, raw slag etc. 2. Increasing the conductivity of the cement paste by adding carbon based materials such as coke breeze, graphite or carbon fibres, etc. In this research, cement were partially replaced by waste coke powder as 2%, 4%, 6%, 8%,10% and 12% by weight.The concrete in fresh state is checked for workability by doing Slump test and Concrete specimens were tested for compressive strength, conductivity by four-probe method and Temperature rise by thermocouples of the specimen. The results obtained were compared with results of normal M-30 concrete mix