A Comparison of Voids in Stone Skeleton Mixtures and Voids in Aggregate Fractions
Nyckelord:
Voids, Stone skeleton, Aggregate fractions, Stone mastic asphalt (SMA)Abstract
The voids in the stone skeleton play an important role in the properties of stone mastic asphalt mixtures. The voids in these types of asphalt mixtures are to a large extent a product of the proportions of the different aggregate fractions that form the stone skeleton. However, the relationship between the voids in the asphalt mixture and the voids in the individual aggregate fractions that form the skeleton is not clearly understood. The aim of this study was to investigate and if possible quantify this relationship.
The voids in the stone mastic asphalt mixtures were determined from gyratory compacted specimens while the voids in the aggregate fractions were determined from rodded aggregate fractions specimens. The aggregate fractions were compacted using the rodding method that is used in the determination of the rodded unit weight in the Bailey mix design method.
The study showed that the voids in the stone mastic asphalt mixtures can be related to the voids in the aggregate fractions that form the skeleton in a logical manner.
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