An accelerated aging approach was developed for predicting the future physical and environmental behavior of pavement products made with waste material. Coal fly ash (CFA) use in portland cement concrete (PCC) was selected as a model system. Three types of accelerated aging techniques [Arrhenius aging (AA), cyclic loading (CL), and freeze-thaw (FT) exposure] were examined. As field verification of the developed accelerated aging approach, a 10-year-old road from U.S. 20, Fort Dodge, IA, made of PCC containing a Class C CFA and showing some failures (macro- and microcracking) was used. The approach to evaluate the ability of the developed accelerated aging process to model real-time material aging was based on physical characterization and measurement of fundamental leaching parameters. In this paper, leaching behavior of the laboratory specimens that underwent accelerated aging is compared to that of the slab samples from U.S. 20 in Iowa that underwent field aging.
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