| Summary: | There is possibility of exploitation of buton rock asphalt as a highway material, by processing of solvent extraction. This process will produce bitumen and filler. From Kabungka's rock asphalt, filler of Ca CO3 will be found. The exploitation of buton rock asphalt will be optimal, if both extract bitumen and filler can be employed.
In an asphalt concrete mixture, a filler is needed with requirement that it has the same kind and source of the main aggregates. On the other hand, buton rock asphalt does not meet the requirement. Due to the filler function, there is a possibili47 to employ it as substitution filler.
From this research, the extract filler can be used as substitution filler of an asphalt concrete mixture. And extract filler content of 11 - 12% equivalents of dust stone can fulfilled its requirements.
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