Abstract
In the present study, the effect of nylon fiber (NF) on the permeability as well as the mechanical properties of concrete incorporating 100% recycled coarse aggregate (RA) was experimentally investigated. Concrete was produced by adding 0, 0.6 and 1.2 kg/m3 of NF and then cured in water for the pre-determined period. Measurements of compressive strengths, ultrasonic pulse velocity and total charge passed through concrete were carried out, and the corresponding test results were compared to those of concrete incorporating natural coarse aggregate (NA). Test results indicated that recycled coarse aggregate concrete (RAC) showed lower performance than natural coarse aggregate concrete (NAC) because of the adhered mortars in RA. However, it was obvious that the addition of NF in RAC mixtures was much effective in enhancing the performance of the concretes due to the crack bridging effect from NF. In particular, high content of NF (1.2 kg/m3) led to a beneficial effect on concrete properties compared to low content of NF (0.6 kg/m3) with respect to mechanical properties and permeability, especially for RAC mixtures.
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Acknowledgements
This work was financially supported by the Korea Agency for Infrastructure Technology Advancement to carry out the R&D project, which is entitled as “Development of organic and inorganic high-elasticity hybrid repair materials for the extended service life of road facilities”. The authors gratefully acknowledge the financial support.
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Lee, S., Chu, Y., Ha, S., Kim, Y., Jeong, J. (2020). Performance of Recycled Coarse Aggregate Concrete with Different Nylon Fiber Content. In: Ha-Minh, C., Dao, D., Benboudjema, F., Derrible, S., Huynh, D., Tang, A. (eds) CIGOS 2019, Innovation for Sustainable Infrastructure. Lecture Notes in Civil Engineering, vol 54. Springer, Singapore. https://doi.org/10.1007/978-981-15-0802-8_87
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DOI: https://doi.org/10.1007/978-981-15-0802-8_87
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