Experimental Study on CFRP-PVC Confined RAC under Axial Compression

Abstract:

Compared with natural aggregate concrete (NAC), the cylinder compressive strength and elastic modulus of Recycled aggregate concrete (RAC) are decreased, but the brittleness is increased. The axial compression performance of RAC can be improved by external confinement. In this paper, the effects of Polyvinyl chloride (PVC) pipe confinement and composite confinement of PVC pipe and Carbon Fiber Reinforced Polymer (CFRP) on the axial compression performance of RAC were investigated. The results showed that with the increase of the replacement rate of recycled coarse aggregate, the cylinder compressive strength, peak strain and elastic modulus of RAC were decreased; PVC pipe confinement could significantly improve the cylinder compressive strength, peak strain and elastic modulus of RAC; the CFRP could further improve the cylinder compressive strength and elastic modulus of PVC-RAC to a certain extent, and could significantly enhance the peak strain of PVC-RAC. PVC pipe and CFRP-PVC pipe confinement could improve the axial compression performance of RAC more effectively than NAC. Consequently, PVC pipe and CFRP-PVC pipe confinement could reduce the influence of recycled aggregate (RA) quality on variability of RAC axial compression performance.

• Periodical: Solid State Phenomena (Volume 294)
• Pages: 143-149
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.294.143
• Online since: July 2019
• Authors: Jie Qun Lu*, Yuan Tian, Jia Geng Chen, Chen Yu Zhu, FuYuan Zeng, Jin Cheng Yang, Wei Wang
• Keywords: Axial Compression Performance, CFRP-PVC Pipe Confinement, Elastic Modulus, Peak Strain, Recycled Aggregate Concrete

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