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- W651176119 abstract "The objective of this study was to develop criteria and guideines for recycling portland cement concrete (PCC) airport aprons. Included in this study are all aspects of the recycling process including breakup and removal, steel reinforcement removal, crushing, screening, stockpiling, mix design, testing, placing, finishing, and performance. Recycling of PCC requires some specialized equipment such as pavement breakers and electromagnets for steel removal; however, all of the other equipment and procedures are those commonly used in the construction industry. Based on the regression experimental design procedure and laboratory tests conducted on pavement samples for six airports of widely varying age and conditions, it has been conclusively shown that aged PCC pavements can be recycled into new surface courses that meet strength requirements and have the same cyclic load carrying (fatigue) characteristics as those constructed with virgin materials. The optimum values for proportions that should be used in recycle mixes are: water/cement ratio - 0.46, coarse aggregate content - 58 percent, and virgin sand content - 42 percent. Because the fines generated from the crushing of the old pavement degrade the strength of recycled concrete, their use is not recommended for recycled heavy duty airport pavements." @default.
- W651176119 created "2016-06-24" @default.
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- W651176119 date "1986-10-01" @default.
- W651176119 modified "2023-09-24" @default.
- W651176119 title "RECYCLING OF PORTLAND CEMENT CONCRETE AIRPORT PAVEMENTS - AN EXPERIMENTAL INVESTIGATION. FINAL REPORT" @default.
- W651176119 hasPublicationYear "1986" @default.
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