Aggregate gradation is one important part of the performance of asphalt mixture.Workability is one of the important parameters in asphalt mixture design that can easily be done in thefield. Marshall compactor type is the most widely used in Indonesia even in the world. Therefore it isnecessary to measure the workability using a type of Marshall compactor. The purposes of this studywere: (1) measures the workability of asphalt concrete on five aggregate gradation targets that would beobtained the relationship between gradation index (GI) and workability index (WI), and (2) developworkability measurement asphalt mixture with Marshall compactor. The result showed that Marshallcompactor can be used to measure workability of asphalt mixture and the relationship between aggregategradation or gradation index and workability index is very strong. The model is WI = 0.005 (GI2)-0.2374(GI) + 5.9197 with R2 = 0.9721.
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