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- W824160805 abstract "The uncompacted void content test (AASHTO T304) is currently specified in the “Standard Specification for Superpave Volumetric Mix Design” – AASHTO MP2 as a consensus property for measuring fine aggregate angularity. Superpave is the design process most commonly used in the United States for hot mix asphalt (HMA). The uncompacted void content test is referred to as the fine aggregate angularity (FAA) test and is a consensus property test and therefore does not directly measure the angularity of the fine aggregate. The premise behind the test is that fine aggregates with a high degree of angularity (e.g., broken faces) will have higher uncompacted void contents as compared with fine aggregates with a lower degree of angularity (e.g., natural sands). The compacted aggregate resistance (CAR) test, which has been proposed as a replacement test to the FAA test, was investigated to determine if there is a relationship between FAA and the CAR values and their relationship to HMA performance. A partial factorial experimental plan consisting of five gradations was utilized in the study resulting in 19 different combinations being tested. The sands studied were a natural sand and four manufactured ones from parent material consisting of dolomite, limestone, trap rock, and a glacial gravel. Dynamic modulus and unconfined accumulated strain tests were performed to rank the performance of the different combinations. The results of the testing indicate that the FAA test does not adequately rank the performance of the varying unconfined void contents, however, gradation and source of material plays a much greater role in determining the performance of HMA. The CAR test values ranked the performance of the various gradations appropriately, but were not sensitive to the relative ranking of the source materials." @default.
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- W824160805 date "2007-01-01" @default.
- W824160805 modified "2023-09-24" @default.
- W824160805 title "The Effect of Fine Aggregate Properties on Hot-Mix Asphalt Performance" @default.
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