%A NIM. 08620001 MOHAMMAD NASRUDIN %O Pembimbing : Retno Rahmawati, M.Si %T ANALISIS SIFAT MEKANIK DAN STRUKTUR MIKRO BATAKO DENGAN CAMPURAN ABU TERBANG BATUBARA %X Nowadays the nessecary of batako highly increase, but the batako quality is low. In other hand the utilization of volcanic sand as batako absorbent and the recycling of coal fly ash waste is very important researched. The purpose of this study is to create batako with variation of mixing of coal fly ash and to know the characteristics of the mechanical properties and micro structure. The Variation of percentage of coal fly ash was added into sample of 0%, 7%, 13%, 20%, 25%, and 27%. In this research, the characteristic of studied batako are: density, water absorption, compressive strength, splitting test and micro structure analysis. Result of test on characteristic of batako of coal fly ash showed that the most optimum mix was 7% value of characterization respectively as follow: 544 kg/m 3 Density, 14,8% water absorpsion, 18,92 MPa compressive strength and 6,03 MPa splitting test. Keyword: Batako, Fly Ash, Coal, Mechanical Trait. %D 2014 %I UIN SUNAN KALIJAGA %L digilib10951