PENGARUH PENAMBAHAN LIMBAH ABU BATUBARA TERHADAP KONDUKTIVITAS THERMAL, KUAT LENTUR, MASSA JENIS DAN BIAYA PEMBUATAN GENTENG DI INDUSTRI GENTENG KARANGASEM WIROSARI KABUPATEN GROBOGAN

Abstract

clay or mixed with other ingredients, baked to a temperature high enough so it is not destroyed when soaked in water. In general, most industries are still a lot of tiles that have not recover waste coal ash is, therefore, tile made from mixing the basic ingredients tile maker with coal ash is still rare in the meet. This study aims to determine the effect and what percentage of the addition of coal ash is the most effective. of thermal conductivity, flexural strength, density test specimen and the estimated cost of production. As a research object tile material is formed into blocks and cylinder-shaped specimen. Test specimens were made using a variation of the composition of clay and coal ash each with a composition of 0%, 5%, 10%, 15%, 20% and 25%. Once established then performed at a temperature of 800ºC combustion. The result showed a good thermal conductivity value at the composition of 25% amounting to 14.80 W / m º C. The composition of coal ash is used for flexural strength obtained from specimens with a composition of 20% amounting to 66.144 kg / cm ² because the value is still strong bending flexural strength values between the original specimen. For a minimum density of specimens obtained from specimens with a composition of 25% amounting to 1.464 kg / cm ³. The cost of tile production engineering costs greater than the original tile production costs, but when viewed from the quality or the quality, tile engineering has advantages compared with the original tile that has a low thermal conductivity and density of the lighter