Axial Compressive Behavior of FRP-Confined Compression-Cast Recycled Aggregate Concrete
Publication: Journal of Composites for Construction
Volume 28, Issue 3
Abstract
With the increasing scarcity of natural gravel resources and increased production of construction and demolition waste, recycled aggregates offer prospects for concrete structures. However, the adhered loose and porous mortar and microcracks in recycled aggregates led to impaired mechanical behavior of recycled aggregate concrete (RAC) and reduced durability in harsh environments, significantly restricting its engineering application. Compression-casting can solve the problems of low strength and poor durability of RAC; however, it induces significant brittleness of concrete in compression. This study proposed an improvement in the ductility of compression-cast RAC through confinement using fiber-reinforced polymer (FRP) laminates. A total of 32 FRP-confined compression-cast cylinder specimens were tested under uniaxial compression, with variables including concrete mixture proportion, FRP thickness, and concrete casting method. The experimental results showed that the ultimate axial stresses of the unconfined RAC and FRP-confined RAC increased by up to 34.8% and 14.5%, respectively, and the ultimate axial strain decreased by up to 49.0% with compression-casting. Furthermore, the compression-casting method resulted in an 8.5% reduction in the measured average rupture strain of the FRP. The confinement efficiency was not significantly affected by compression-casting, as indicated by a slightly greater slope of the strength enhancement ratio with an increase in the confinement ratio for FRP-confined compression-cast RAC. Stress–strain models of FRP-confined compression-cast and normal RAC were proposed based on test data from this study and the literature. It was found that the proposed model improved the prediction accuracy of the stress–strain behavior compared with existing models.
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Data Availability Statement
All data, models, and codes generated or used during the study appear in the published article.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 52068023), the Basic and Applied Basic Research Foundation of Guangdong Province (No. 2023A1515011933), the Shenzhen Natural Science Fund (the Stable Support Plan Program 20220810142132002), and the Shenzhen Science and Technology Program (No. KQTD20200820113004005).
Notation
The following symbols are used in this paper:
- D
- diameter of the specimens;
- E2
- slope of the asymptotical line of the hardening branch of the stress–strain curve;
- Ec
- elasticity modulus of concrete;
- Ef
- elasticity modulus of the FRP;
- f0
- coordinate of the intersection between the asymptotic line and the vertical axis;
- fco
- compressive strength of unconfined concrete;
- fcc
- ultimate axial stresses of FRP-confined concrete;
- peak axial stress of concrete under a given constant confining pressure;
- ffu
- tensile strength of FRP;
- fl
- confinement pressure provided by the FRP jacket when it ruptures;
- H
- height of the specimens;
- tf
- thickness of the FRP;
- concrete axial strain at peak stress under a given constant confining pressure σl;
- ɛco
- unconfined concrete compressive strain at peak stress;
- ɛcu
- ultimate axial strain of FRP-confined concrete;
- ɛfu
- ultimate tensile strain of the FRP from the coupon tests;
- ɛh,rup
- measured average FRP hoop rupture strain;
- ɛl
- lateral/hoop strain;
- ρK
- confinement stiffness ratio;
- ρɛ
- strain ratio; and
- σl
- confining pressure.
References
ACI (American Concrete Institute). 2017. Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures. ACI 440.2R-2017. Farmington Hills, MI: ACI.
ACI (American Concrete Institute). 2019. Building code requirements for structural concrete and commentary. ACI 318-19/ACI 318R-19. Farmington Hills, MI: ACI.
ASTM. 2016. Standard specification for concrete aggregates. ASTM C33-16. West Conshohocken, PA: ASTM.
ASTM. 2017. Standard test method for tensile properties of polymer matrix composite materials. ASTM D3039/D3039M-17. West Conshohocken, PA: ASTM.
Bai, G., C. Zhu, C. Liu, and B. Liu. 2020. “An evaluation of the recycled aggregate characteristics and the recycled aggregate concrete mechanical properties.” Constr. Build. Mater. 240: 117978. https://doi.org/10.1016/j.conbuildmat.2019.117978.
Benmokrane, B., A. H. Ali, and H. Mohamed. 2016. “Microstructural characterization and durability of GFRP reinforcing bars exposed to concrete environment and saline solution.” In Proc., Int. Workshop on Seawater Sea-Sand Concrete Structures Reinforced with FRP Composites. Hong Kong: Hong Kong Polytechnic Univ.
Cao, Y. H., S. J. Wang, Y. Wang, Z. Zhu, S. H. Wang, and Y. Z. Cao. 2021. “Current status and future development trend of comprehensive utilization of construction waste in China.” [In Chinese.] China Build. Mater. 9: 118–121.
Chen, G. M., Y. H. He, T. Jiang, and C. J. Lin. 2016. “Behavior of CFRP-confined recycled aggregate concrete under axial compression.” Constr. Build. Mater. 111: 85–97. https://doi.org/10.1016/j.conbuildmat.2016.01.054.
Chen, G. M., J. J. Zhang, T. Jiang, C. J. Lin, and Y. H. He. 2018. “Compressive behavior of CFRP-confined recycled aggregate concrete in different-sized circular sections.” J. Compos. Constr. 22 (4): 04018021. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000859.
Domingo-Cabo, A., C. Lazaro, F. Lopez-Gayarre, M. A. Serrano-López, P. Serna, and J. O. Castaño-Tabares. 2009. “Creep and shrinkage of recycled aggregate concrete.” Constr. Build. Mater. 23 (7): 2545–2553. https://doi.org/10.1016/j.conbuildmat.2009.02.018.
Guo, H., C. Shi, X. Guan, J. Zhu, Y. Ding, T.-C. Ling, H. Zhang, and Y. Wang. 2018. “Durability of recycled aggregate concrete—A review.” Cem. Concr. Compos. 89: 251–259. https://doi.org/10.1016/j.cemconcomp.2018.03.008.
Hamilton, I., H. Kennard, O. Rapf, et al. 2020. Global status report for buildings and construction. Paris, France: Global Alliance for Buildings and Construction.
Jaskowska-Lemanska, J. 2019. “Impurities of recycled concrete aggregate—Types, origin and influence on the concrete strength parameters.” IOP Conf. Ser.: Mater. Sci. Eng. 603 (4): 042056. https://doi.org/10.1088/1757-899X/603/4/042056.
Jiang, C., F. Yuan, Y.-F. Wu, and X.-M. Zhao. 2019. “Effect of interfacial bond on plastic hinge length of FRP-confined RC columns.” J. Compos. Constr. 23 (2): 04019007. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000932.
Jiang, T., and J. G. Teng. 2007. “Analysis-oriented stress‒strain models for FRP-confined concrete.” Eng. Struct. 29 (11): 2968–2986. https://doi.org/10.1016/j.engstruct.2007.01.010.
Kazmi, S. M. S., M. J. Munir, and Y.-F. Wu. 2021. “Application of waste tire rubber and recycled aggregates in concrete products: A new compression casting approach.” Resour. Conserv. Recycl. 167: 105353. https://doi.org/10.1016/j.resconrec.2020.105353.
Kazmi, S. M. S., M. J. Munir, Y.-F. Wu, I. Patnaikuni, Y. W. Zhou, and F. Xing. 2019. “Influence of different treatment methods on the mechanical behavior of recycled aggregate concrete: A comparative study.” Cem. Concr. Compos. 104: 103398. https://doi.org/10.1016/j.cemconcomp.2019.103398.
Li, P., D. Huang, R. Li, R. Li, and F. Yuan. 2022. “Effect of aggregate size on the axial compressive behavior of FRP-confined coral aggregate concrete.” Polymers 14 (18): 3877. https://doi.org/10.3390/polym14183877.
Li, P., Y.-F. Wu, Y. Zhou, and F. Xing. 2019. “Stress‒strain model for FRP-confined concrete subject to arbitrary load path.” Composites, Part B 163: 9–25. https://doi.org/10.1016/j.compositesb.2018.11.002.
Liang, Z., Z. Hu, Y. Zhou, Y. Wu, X. Zhou, B. Hu, and M. Guo. 2022. “Improving recycled aggregate concrete by compression casting and nano-silica.” Nanotechnol. Rev. 11 (1): 1273–1290. https://doi.org/10.1515/ntrev-2022-0065.
Lim, J. C., and T. Ozbakkaloglu. 2014. “Confinement model for FRP-confined high-strength concrete.” J. Compos. Constr. 18 (4): 04013058. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000376.
Munir, M. J., S. M. S. Kazmi, Y.-F. Wu, I. Patnaikuni, Y. Zhou, and F. Xing. 2020. “Stress strain performance of steel spiral confined recycled aggregate concrete.” Cem. Concr. Compos. 108: 103535. https://doi.org/10.1016/j.cemconcomp.2020.103535.
NDRC (National Development and Reform Commission). 2022. Operation status of the building materials industry in 2021. Beijing: NDRC.
Nishizaki, I., I. Sasaki, and H. Sakuraba. 2016. “Long-term exposure performance of FRP composites in marine environments.” In Proc., Int. Workshop on Seawater Sea-Sand Concrete (SSC) Structures Reinforced with FRP Composites. Hong Kong: Hong Kong Polytechnic Univ.
Ozbakkaloglu, T., J. C. Lim, and T. Vincent. 2013. “FRP-confined concrete in circular sections: Review and assessment of stress–strain models.” Eng. Struct. 49: 1068–1088. https://doi.org/10.1016/j.engstruct.2012.06.010.
Pan, Z., S. Wang, Y. Liu, B. Li, Z. Jia, Y. Zhang, and J. Wang. 2019. “The hydration, pore structure and strength of cement-based material prepared with waste soaking solution from acetic acid treatment of regenerated aggregates.” J. Cleaner Prod. 235: 866–874. https://doi.org/10.1016/j.jclepro.2019.06.335.
Pani, L., L. Francesconi, J. Rombi, F. Mistretta, M. Sassu, and F. Stochino. 2020. “Effect of parent concrete on the performance of recycled aggregate concrete.” Sustainability 12 (22): 9399. https://doi.org/10.3390/su12229399.
Pedro, D., J. De Brito, and L. Evangelista. 2014. “Influence of the use of recycled concrete aggregates from different sources on structural concrete.” Constr. Build. Mater. 71: 141–151. https://doi.org/10.1016/j.conbuildmat.2014.08.030.
Poon, C. S., Z. H. Shui, and L. Lam. 2004. “Effect of microstructure of ITZ on compressive strength of concrete prepared with recycled aggregates.” Constr. Build. Mater. 18 (6): 461–468. https://doi.org/10.1016/j.conbuildmat.2004.03.005.
Popovics, S. 1973. “A numerical approach to the complete stress‒strain curve of concrete.” Cem. Concr. Res. 3 (5): 583–599. https://doi.org/10.1016/0008-8846(73)90096-3.
Pour, A. F., G. D. Nguyen, T. Vincent, and T. Ozbakkaloglu. 2020. “Investigation of the compressive behavior and failure modes of unconfined and FRP-confined concrete using digital image correlation.” Compos. Struct. 252: 112642. https://doi.org/10.1016/j.compstruct.2020.112642.
Tabsh, S. W., and A. S. Abdelfatah. 2009. “Influence of recycled concrete aggregates on strength properties of concrete.” Constr. Build. Mater. 23 (2): 1163–1167. https://doi.org/10.1016/j.conbuildmat.2008.06.007.
Tam, V. W. Y., A. Butera, and K. N. Le. 2016. “Carbon-conditioned recycled aggregate in concrete production.” J. Cleaner Prod. 133: 672–680. https://doi.org/10.1016/j.jclepro.2016.06.007.
Tam, V. W. Y., A. Butera, K. N. Le, and W. Li. 2020. “Utilising CO2 technologies for recycled aggregate concrete: A critical review.” Constr. Build. Mater. 250: 118903. https://doi.org/10.1016/j.conbuildmat.2020.118903.
Teng, J. G., T. Jiang, L. Lam, and Y. Z. Luo. 2009. “Refinement of a design-oriented stress‒strain model for FRP-confined concrete.” J. Compos. Constr. 13 (4): 269–278. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000012.
Topcu, I. B., and S. Şengel. 2004. “Properties of concretes produced with waste concrete aggregate.” Cem. Concr. Res. 34 (8): 1307–1312. https://doi.org/10.1016/j.cemconres.2003.12.019.
Wang, L., J. Wang, X. Qian, P. Chen, Y. Xu, and J. Guo. 2017. “An environmentally friendly method to improve the quality of recycled concrete aggregates.” Constr. Build. Mater. 144: 432–441. https://doi.org/10.1016/j.conbuildmat.2017.03.191.
Wang, R., N. Yu, and Y. Li. 2020. “Methods for improving the microstructure of recycled concrete aggregate: A review.” Constr. Build. Mater. 242: 118164. https://doi.org/10.1016/j.conbuildmat.2020.118164.
Wang, X., J. Wang, S. M. S. Kazmi, and Y.-F. Wu. 2022. “Development of new layered compression casting approach for concrete.” Cem. Concr. Compos. 134: 104738. https://doi.org/10.1016/j.cemconcomp.2022.104738.
Watanabe, T., S. Nishibata, C. Hashimoto, and M. Ohtsu. 2007. “Compressive failure in concrete of recycled aggregate by acoustic emission.” Constr. Build. Mater. 21 (3): 470–476. https://doi.org/10.1016/j.conbuildmat.2006.04.002.
Wu, G., Z. T. Lü, and Z. S. Wu. 2006. “Strength and ductility of concrete cylinders confined with FRP composites.” Constr. Build. Mater. 20 (3): 134–148. https://doi.org/10.1016/j.conbuildmat.2005.01.022.
Wu, Y.-F., S. M. S. Kazmi, M. J. Munir, Y. Zhou, and F. Xing. 2020. “Effect of compression casting method on the compressive strength, elastic modulus and microstructure of rubber concrete.” J. Cleaner Prod. 264: 121746. https://doi.org/10.1016/j.jclepro.2020.121746.
Wu, Y.-F., and Y. Wei. 2015. “General stress‒strain model for steel- and FRP-confined concrete.” J. Compos. Constr. 19 (4): 04014069. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000511.
Xiao, J., W. Li, Y. Fan, and X. Huang. 2012. “An overview of study on recycled aggregate concrete in China (1996–2011).” Constr. Build. Mater. 31: 364–383. https://doi.org/10.1016/j.conbuildmat.2011.12.074.
Youssef, M. N., M. Q. Feng, and A. S. Mosallam. 2007. “Stress‒strain model for concrete confined by FRP composites.” Composites, Part B 38 (5–6): 614–628. https://doi.org/10.1016/j.compositesb.2006.07.020.
Yuan, F., L. Cao, and H. Li. 2022. “Axial compressive behaviour of high-strength steel spiral-confined square concrete-filled steel tubular columns.” J. Constr. Steel Res. 192: 107245. https://doi.org/10.1016/j.jcsr.2022.107245.
Yuan, F., J. Song, and Y. Wu. 2023. “Effect of compression casting method on the axial compressive behavior of FRP-confined seawater sea-sand concrete columns.” Eng. Struct. 290: 116311. https://doi.org/10.1016/j.engstruct.2023.116311.
Zhao, J. L., T. Yu, and J. G. Teng. 2015. “Stress‒strain behavior of FRP-confined recycled aggregate concrete.” J. Compos. Constr. 19 (3): 04014054. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000513.
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Published In
Journal of Composites for Construction
Volume 28 • Issue 3 • June 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jul 11, 2023
Accepted: Dec 17, 2023
Published online: Mar 28, 2024
Published in print: Jun 1, 2024
Discussion open until: Aug 28, 2024
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