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Some features of this site may not work without it. The effect of fine aggregate angularity, asphalt content and performance graded asphalts on hot mix asphalt performance. File s 03 Author Stakston, Anthony.

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Publisher Wisconsin Highway Research Program. Metadata Show full item record. This research was directed towards better understanding of the influence of angularity of fine aggregates, asphalt content, and performance grade of asphalts on hot mix asphalt HMA performance.

Aggregates from four sources across the state of Wisconsin were used in this study. Each source provided two blends that vary in gradation: 1 a fine blend and 2 an S-shaped blend. Two indices reported data hot ndes to the construction compaction phase of the gyratory compaction initial stage and two indices related to the traffic densification stage later stage. The of this study do not support the assumption that higher values of FAA would always result in better performing mixtures. The findings show the effect of FAA to be highly dependent on the source of the aggregates and their gradation.

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For certain blends of aggregates the laboratory compaction data show adverse effect of angularity on mixture resistance to shearing. It is therefore difficult to suggest a limit on FAA independent of the source or gradation that would improve quality of asphalt mixtures. The of this study confirm earlier findings that hot ndes the asphalt content has an important influence on critical properties of HMA mixtures, which include volumetric and frictional resistance of mixtures. The effect is found to be highly dependent on the source of the aggregate.

The effect of asphalt content is found to be more important during the initial stages hot ndes compaction compared to the final stages for the majority of the blends tested in this study. The indicate that the new parameters selected CEI and TEI are sensitive to asphalt content and follow the known trend of changes. Because of this sensitivity, they show the potential of complimenting the volumetric properties in selecting a mixture de that would result in good performance. The of this study indicate that varying the performance grade of the asphalt has an important influence on certain critical properties of HMA mixtures.

The effect of the performance grade is found to be more important during the final stages compared to the initial stages of compaction for the majority of the blends tested in this study. Because of the lack of trends between FAA values and the indices measured in this study, it is recommended that actual testing of the mixture with the selected asphalt be conducted and that the selection be based on the of CEI, TEI, and volumetrics. Subject Angularity. Description p. Part of Wisconsin Highway Research Program.

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A large percentage of the asphaltic paving projects performed in Wisconsin are asphaltic overlays of existing concrete or asphaltic pavements. Due to varying performance of overlay, a standard set of guidelines is needed Permanent deformation in asphalt mixture, also known as? Rutting in the asphalt mixture layer is the permanent deformation of the asphaltic Christopher Wisconsin Highway Research Program The intent of this project was to examine typical hot mix asphalt HMA pavements that are constructed in the state of Wisconsin.

The analysis compares the suggested pavement structures based on the pavement de This Collection. Register.

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