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Evaluation of warm-recycled asphalt mixtures containing polyethylene wax-based WMA additive

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Resumo:The use of reclaimed asphalt pavement (RAP) in the construction of new asphalt pavements is beneficial because it provides both cost savings and reduction of environmental effects. Recently, warm-mix asphalt (WMA) technology was applied to asphalt recycling at a lower than conventional temperature. As a result, warm-recycled asphalt possibly increases the usage of RAP material, saves energy and reduces CO2 emission. The main purposes of this study are to examine the influences of polyethylene wax-based WMA additive on the optimum asphalt content of warm-recycled asphalt mixture based on the Marshall mix design and to evaluate performance of warm-recycled asphalt mixture containing 30% RAP with polyethylene wax-based WMA additive in terms of the rutting and stripping resistances. Based on the limited laboratory test results, polyethylene wax-based WMA additive is effective to decrease mixing and compacting temperatures without compromising the volumetric characteristics of warm-recycled asphalt mixtures compared to hot-recycled asphalt mixture. Also, it doesn’t affect the optimum asphalt content on recycled-asphalt mixture. Overall, the performance of warm-recycled asphalt mixture using polyethylene wax-based WMA additive is comparable to hot-recycled asphalt mixture.
Autores principais:Kim, Yongjoo
Outros Autores:Lee, Munseop; Lee, Jinwook; Cho, Dongwoo; Kwon, Sooahn; Oliveira, Joel
Assunto:Asphalt recycling WMA additive Rut resistance Strip resistance
Ano:2013
País:Portugal
Tipo de documento:comunicação em conferência
Tipo de acesso:acesso restrito
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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