Development of an economical thin, quiet, long-lasting, high friction surface layer for economical use in Illinois, volume 2 : field construction, field testing, and engineering benefit analysis.
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2013-03-01
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Abstract:This project provides techniques to improve hot-mix asphalt (HMA) overlays specifically through the use of ; special additives and innovative surfacing technologies with aggregates that are locally available in Illinois. The ; ultimate goal is to improve pavement performance through optimized materials while also controlling cost by ; efficiently using local materials. Therefore, the proposed new mixes use locally available aggregates when ; possible. The project also considered the use of alternative aggregates such as steel slag to increase the ; friction quality of the HMA and therefore improve pavement performance. To evaluate the newly developed ; wearing course mixtures and evaluate their performance under actual traffic loading, test pavements were ; constructed, including control mixtures, between August and November 2010 in northern Illinois. The newly ; proposed mixtures include fine dense-graded HMA and stone matrix asphalt (SMA). The fine dense-graded ; HMA was designed using the Bailey method and developed with the hope of improved compactability for thinner ; asphalt layers. The SMA contained a 4.75-mm nominal maximum aggregate size (NMAS) that allows for layers ; as thin as 0.75 in. On-site performance tests were conducted at 4-month intervals following construction; the ; tests include noise, friction, rutting, and texture profiling. An engineering benefit analysis was performed to ; evaluate the new mixes’ cost effectiveness. New HMAs are proposed, along with alternative cross-sections that ; improve pavement performance while controlling costs.
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Main Document Checksum:urn:sha-512:dd4731e31892fe98014209d3d94564d6029e7cae0739d5af25c9119872ffd2862c087f4f2cd40f20697b0791857cb753e9c3367082346f5b16e959d5d7418476