Development of Guidelines for High-Volume Recycled Materials for Sustainable Concrete Pavement
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2019-12-01
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Edition:Final, January 2016 – December 2019
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Abstract:The primary goal of this research was to produce concrete for conventional portland cement concrete pavement that incorporated at least 50% recycled materials without compromising performance and service life. The research investigated the use of recycled concrete aggregate (RCA) and fly ash as a means of achieving this goal. A series of mix designs were developed to examine the effect of RCA and fly ash – both together and separately – on fresh and hardened material properties as well as durability and long-term performance. The final task of the research involved an implementation phase, which included construction of pavement sections using a conventional ODOT Class A mix and a mix containing 100 percent RCA and50 percent fly ash. In general, the pavement sections containing the high volumes of recycled materials performed very well in comparison to the Class A concrete in terms of fresh and hardened material properties, shrinkage, load transfer, and durability. Based on the results of the research, a set of guidelines were developed regarding the use of high volumes of recycled concrete aggregate (RCA) and fly ash in the production of portland cement concrete pavement.
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