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原文传递 Creep and Fatigue Characteristics of Superpave Mixtures. Final rept.

题名：	Creep and Fatigue Characteristics of Superpave Mixtures. Final rept.
作者：	DIEFENDERFER, S.
关键词：	Fatigue-; Creep-.;Beam-fatigue; Hot-mix-paving-mixtures; Concretes-; Binders-Materials; Road-materials; Performance-evaluation; Hot-mix-asphalt; Characteristics-; Laboratory-testing.
摘要：	Laboratory creep and fatigue testing was performed on five Superpave surface hot-mix asphalt mixtures placed at the Virginia Smart Road. Differences in creep and fatigue response attributable to production and compaction methods were investigated. In addition, changes in creep response resulting from differences in specimen size were evaluated. Further, an evaluation of the effects of loading frequency, presence of rest periods, and specimen location within the pavement on fatigue life was conducted. Creep compliance values were determined using viscoelastic-based calculations, and time-temperature superposition was used to generate mastercurves. Reported creep compliance response models from the literature were found inadequate for accurately describing the creep compliance mastercurves generated during this study. Differences in creep response between specimens of different sizes were found to be due to specimen and test variability, rather than size. An evaluation of the effects of laboratory and plant production and laboratory and field compaction was inconclusive as material variability appeared greater than production or compaction variability. This study contributes to the understanding of the factors involved in creep and fatigue performance of asphalt mixtures. The mixture responses characterized by this study are related to the rutting and fatigue performance of asphalt pavements. The choice of appropriate asphalt materials to resist rutting and fatigue deterioration will result in reduced maintenance needs and longer service lives for pavements.
报告类型：	科技报告