Analysis of Resistivity, Dielectric Strength and Tensibility of Insulator Materials of A Mixture of Epoxy Resin, Silicone Rubber, and Coal Ash

Coal ash is a coal combustion waste whose amount increases with the use of coal as fuel. The reuse of coal waste has been carried out in civil construction such as the cement industry. Coal ash is utilized in the manufacture of polymer insulating materials with the main ingredients of epoxy resin and silicone rubber. The feasibility of epoxy resin insulators, silicone rubber, and coal ash was tested by testing resistivity, dielectric strength, and tensile strength. The insulator material test was carried out according to ASTM standards and was carried out for 12 different types of samples. The addition of coal ash filler affects the dielectric strength of the test sample. The stability of the test value can be seen in sample S7, with the composition of the sample consisting of 30% resin A, 30% resin B, 20% silicone rubber, and 20% coal fly ash. The test results of the sample code S7 have a resistivity value of 42.793 $M\Omega m$, a dielectric strength value of 154.133 kV/cm, a tensile stress value of 7.53 MPa, and a strain percentage of 16.75%. Calculation of the stability of the research results is from the scoring of the overall composition.