Abstract
Recycled concrete aggregate (RCA), recycled asphalt pavement (RAP), and large stones were used to replace natural aggregates to build pavement base and subbase layers in this study. Two RCA materials with different gradations and a mixture of RCA and RAP materials were used to build recycled aggregate base (RAB) layers at the same thickness. Moreover, large stones were used to build large stone subbase (LSSB) layers at two different thicknesses. Two different geogrids (triaxial and biaxial) and one type of geotextile were applied between the thinner LSSB and subgrade layers, whereas no geosynthetics were used in the thicker LSSB layers. Light weight deflectometer (LWD) and falling weight deflectometer (FWD) tests were performed during construction to make a preliminary stiffness evaluation of the built test cells. In addition, the results of the two field tests were compared with each other. Test results showed that the highest moduli were observed in the test cells built with RAB layers in which RCA materials were used. On the other hand, the lowest moduli were observed in test cells built with the thinner LSSB layers. The two field tests yielded similar modulus trends overall.
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Coban, H.S., Cetin, B., Ceylan, H., Likos, W., Edil, T.B. (2022). Effects of Using Recycled Aggregates and Large Stones for Base and Subbase Layers on Modulus Properties of Pavements. In: Tutumluer, E., Nazarian, S., Al-Qadi, I., Qamhia, I.I. (eds) Advances in Transportation Geotechnics IV. Lecture Notes in Civil Engineering, vol 164. Springer, Cham. https://doi.org/10.1007/978-3-030-77230-7_28
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DOI: https://doi.org/10.1007/978-3-030-77230-7_28
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