Durable superpave hot-mix asphalt mixes in Kansas

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dc.contributor.author Uppu, Kiran Kumar
dc.date.accessioned 2012-04-11T14:02:36Z
dc.date.available 2012-04-11T14:02:36Z
dc.date.issued 2012-04-11
dc.identifier.uri http://hdl.handle.net/2097/13595
dc.description.abstract A recent study at Kansas State University has shown that asphalt producers in Kansas are producing hot-mix asphalt (HMA) mixtures with lower asphalt contents than those in the job-mix formula. These drier mixtures are thought to be susceptible to moisture. This project evaluated the effect of asphalt content on rutting and moisture resistance of HMA. Two different mixtures and four varying asphalt contents, optimum and lower, were selected. Another large-size mixture with four varying asphalt contents was also studied. The Hamburg Wheel Tracking Device (HWTD)test (TEX-242-F) and the Kansas Standard Test-56 (KT-56), or modified Lottman test, were used to predict moisture damage and rutting potential of these mixes. All specimens tested were prepared with the Superpave gyratory compacter. Results of this study showed the drier mixtures performed better in rutting and were less susceptible to moisture.Asphalt content significantly affects the number of wheel passes in the HWTD test. The study also revealed a weak correlation between asphalt film thickness and performance test results. Thus, the effect of varying asphalt content is nonconclusive from a durability point of view. However, performance simulations using a theoretical model show that very dry mixes in asphalt pavements are likely to have shorter performance lives. en_US
dc.description.sponsorship Kansas Department of Transportation en_US
dc.language.iso en en_US
dc.publisher Kansas State University en
dc.subject Asphalt content en_US
dc.subject Drier mixtures en_US
dc.subject Practical performance model en_US
dc.subject Hot mix asphalt en_US
dc.subject QC/QA en_US
dc.subject HMA en_US
dc.title Durable superpave hot-mix asphalt mixes in Kansas en_US
dc.type Thesis en_US
dc.description.degree Master of Science en_US
dc.description.level Masters en_US
dc.description.department Department of Civil Engineering en_US
dc.description.advisor Mustaque Hossain en_US
dc.subject.umi Engineering (0537) en_US
dc.date.published 2012 en_US
dc.date.graduationmonth May en_US

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