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- W567635216 abstract "Superpave, an asphalt concrete mixture design procedure developed under the Strategic Highway Research Program (SHRP), is to be implemented state-wide in Arkansas in 1998. The Arkansas State Highway and Transportation Department (AHTD) sponsored TRC-9604, Superpave Mix Designs for Arkansas, to investigate potential impacts of Superpave implementation on current mix design practice. Aggregates currently used in Arkansas for hot-mix asphalt concrete (HMAC) appear to be acceptable for use in Superpave. It is recommended that AHTD retain (and slightly refine) existing specifications for aggregate source properties, and adopt Superpave specifications for aggregate consensus properties. Recommended adoption of Superpave gradation specifications may result in significant reductions in the use of sand-sized aggregates in HMAC, particularly natural (rounded) sands. HMAC volumetric analysis in Superpave is similar to current AHTD methods, with two notable differences — the method for calculating voids in the mineral aggregate (VMA), and the definition of the dust proportion (fines to asphalt ratio). It is recommended that AHTD adopt Superpave specifications in both instances. It is also recommended that AHTD refine its method for estimating the moisture sensitivity of an HMAC mixture (where it currently uses the Marshall stability test) to reflect current Superpave methodology — the use of the split-tensile strength to determine the effect of moisture on the mix. Overall, the transition from traditional Marshall based mix design to Superpave is certainly feasible, and can be accomplished using current Arkansas aggregates." @default.
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- W567635216 date "1998-10-01" @default.
- W567635216 modified "2023-09-26" @default.
- W567635216 title "Superpave Mix Designs for Arkansas" @default.
- W567635216 hasPublicationYear "1998" @default.
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