Effects of Freeze-Thaw Cycles on the Behavior of the Bond between CFRP Plates and Concrete Substrates
Publication: Journal of Composites for Construction
Volume 22, Issue 3
Abstract
The bond between carbon-fiber-reinforced polymers (CFRPs) and concrete plays a key role in externally bonded CFRP-strengthening technology, but it is susceptible to harsh environments. In the present study, the effects of freeze-thaw cycles ( for 10 h and 30°C for 10 h) in water and 90% relative humidity (RH) on the behavior of the bond between CFRP and concrete were investigated using a single-lap shear test. The freeze-thaw process deteriorated the fracture energy, maximum bond stress, initial stiffness, and load capacity of the CFRP–concrete bond. The effects of water immersion were much more severe than those of exposure to 90% RH. In the case of freeze-thaw cycles under 90% RH conditions, the debonding mode shifted from concrete cohesive failure to adhesive/concrete interfacial debonding. In the case of freeze-thaw cycles with water immersion, the debonding mode (concrete cohesive failure) did not vary owing to the severe degradation in the concrete substrate. A model describing the degradation in the fracture energy of the CFRP–concrete bond as a function of the number of freeze-thaw cycles was developed based on parameter analysis, experimental testing, and the results sourced from literature. An environmental coefficient is proposed to account for the degradation in the CFRP–concrete bond due to freeze-thawing. Using the temperature data and a particular number of freeze-thaw cycles, the service life of the CFRP–concrete bonds in actual applications can be predicted.
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Acknowledgments
This work was financially supported by the National Key Research and Development Program of China (2017YFC0703007), the NSFC with Grant No. 51478145, and the National Key Basic Research Program of China (973 Program) (2012CB026200).
References
ACI (American Concrete Institute). (2002). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI 440.2R-02, Farmington Hills, MI.
ACI (American Concrete Institute). (2008). “Building code requirements for structural concrete and commentary.” ACI 318-08, Farmington Hills, MI.
Al-Mahmoud, F., Mechling, J.-M., and Shaban, M. (2014). “Bond strength of different strengthening systems—Concrete elements under freeze-thaw cycles and salt water immersion exposure.” Constr. Build. Mater., 70, 399–409.
ASTM. (2002). “Standard test method for tensile properties of polymer matrix composite materials.” ASTM D3039/D3039M, West Conshohocken, PA.
ASTM. (2014). “Standard test method for tensile properties of plastics.” ASTM D638-14, West Conshohocken, PA.
ASTM. (2015a). “Standard test method for glass transition temperature (DMA Tg) of polymer matrix composites by dynamic mechanical analysis (DMA).” ASTM D7028, West Conshohocken, PA.
ASTM. (2015b). “Standard test method for resistance of concrete to rapid freezing and thawing.” ASTM C666/C666M, West Conshohocken, PA.
Bekker, P. C. F. (1995). “Durability testing models and methods for masonry.” Proc., PRO 3: Int. RILEM Workshop on Evaluation and Strengthening of Existing Masonry Structures, RILEM Publications SARL, Bagneux, France, 127–142.
Berto, L., Saetta, A., and Talledo, D. (2015). “Constitutive model of concrete damaged by freeze-thaw action for evaluation of structural performance of RC elements.” Constr. Build. Mater., 98, 559–569.
Bizindavyi, L., Neale, K., and Erki, M. (2003). “Experimental investigation of bonded fiber reinforced polymer-concrete joints under cyclic loading.” J. Compos. Constr., 127–134.
Chen, G., Teng, J., and Chen, J. (2010). “Finite-element modeling of intermediate crack debonding in FRP-plated RC beams.” J. Compos. Constr., 339–353.
Chen, J. F., and Teng, J. G. (2001). “Anchorage strength models for FRP and steel plates bonded to concrete.” J. Struct. Eng., 784–791.
Chen, Y., Davalos, J. F., and Ray, I. (2006). “Durability prediction for GFRP reinforcing bars using short-term data of accelerated aging tests.” J. Compos. Constr., 279–286.
CNR (Italian National Research Council). (2013). “Guide for the design and construction of an externally bonded FRP system for strengthening existing structures.” CNR DT200, Rome.
Code of China. (2002). “Standard for test method of mechanical properties on ordinary concrete.” GB/T50081, China Standard Publishing House, Beijing.
Code of China. (2010). “Code for design of concrete structures.” GB 50010, China Standard Publishing House, Beijing (in Chinese).
Colombi, P., Fava, G., and Poggi, C. (2010). “Bond strength of CFRP–concrete elements under freeze-thaw cycles.” Compos. Struct., 92(4), 973–983.
Dai, J. G., Ueda, T., and Sato, Y. (2005). “Development of the nonlinear bond stress-slip model of fiber reinforced plastics sheet-concrete interfaces with a simple method.” J. Compos. Constr., 52–62.
Diab, H. M., Wu, Z., and Iwashita, K. (2009). “Theoretical solution for fatigue debonding growth and fatigue life prediction of FRP–concrete interfaces.” Adv. Struct. Eng., 12(6), 781–792.
Guan, Q. Y., Gao, D. Y., and Li, S. (2010). “Study on CFRP–concrete bond behavior subjected to freeze-thaw cycles.” Ind. Constr., 40(6), 9–12 (in Chinese).
Lau, D., and Büyüköztürk, O. (2010). “Fracture characterization of concrete/epoxy interface affected by moisture.” Mech. Mater., 42(12), 1031–1042.
Lee, Y.-H., Ker, H.-W., and Lin, C.-H. (2008). “Development of transverse cracking prediction models for jointed concrete pavements using LTPP database.” ⟨http://www.datapave.com⟩ (Jan. 13, 2008).
Li, H., Xian, G., Lin, Q., and Zhang, H. (2012). “Freeze-thaw resistance of unidirectional-fiber-reinforced epoxy composites.” J. Appl. Polym. Sci., 123(6), 3781–3788.
Liu, X. L., and Tang, G. P. (2007). “Research on prediction method of concrete freeze-thaw durability under field environments.” Chin. J. Rock Mech. Eng., 191(12), 2412–2419 (in Chinese).
Lu, X., Ye, L., Teng, J., and Jiang, J. (2005). “Meso-scale finite element model for FRP sheets/plates bonded to concrete.” Eng. Struct., 27(4), 564–575.
Mukhopadhyaya, P., Swamy, R., and Lynsdale, C. (1998). “Influence of aggressive exposure conditions on the behaviour of adhesive bonded concrete–GFRP joints.” Constr. Build. Mater., 12(8), 427–446.
Ouyang, Z., and Wan, B. L. (2007). “Experimental and numerical study of moisture effects on the bond fracture energy of FRP/concrete joints.” J. Reinf. Plast. Comp., 27(2), 205–223.
Pan, Y., Xian, G., and Silva, M. A. (2015). “Effects of water immersion on the bond behavior between CFRP plates and concrete substrate.” Constr. Build. Mater., 101, 326–337.
Sharma, S., Ali, M. M., Goldar, D., and Sikdar, P. (2006). “Plate-concrete interfacial bond strength of FRP and metallic plated concrete specimens.” Compos. Part B, 37(1), 54–63.
Silva, M. A., and Biscaia, H. (2008). “Degradation of bond between FRP and RC beams.” Compos. Struct., 85(2), 164–174.
Silva, M. A., Biscaia, H. C., and Marreiros, R. (2013). “Bond-slip on CFRP/GFRP-to-concrete joints subjected to moisture, salt fog and temperature cycles.” Compos. Part B, 55, 374–385.
Subramaniam, K. V., Ali-Ahmad, M., and Ghosn, M. (2008). “Freeze-thaw degradation of FRP–concrete interface: Impact on cohesive fracture response.” Eng. Fract. Mech., 75(13), 3924–3940.
Toutanji, H., Saxena, P., Zhao, L., and Ooi, T. (2007). “Prediction of interfacial bond failure of FRP–concrete surface.” J. Compos. Constr., 427–436.
Ueno, S., Toutanji, H., and Vuddandam, R. (2014). “Introduction of a stress state criterion to predict bond strength between FRP and concrete substrate.” J. Compos. Constr., 04014024.
Wardeh, G., and Ghorbel, E. (2015). “Prediction of fracture parameters and strain-softening behavior of concrete: Effect of frost action.” Mater. Struct., 48(1–2), 123–138.
Yao, J., Teng, J. G., and Chen, J. F. (2005). “Experimental study on FRP-to-concrete bonded joints.” Compos. Part B, 36(2), 99–113.
Yun, Y., and Wu, Y.-F. (2011). “Durability of CFRP–concrete joints under freeze-thaw cycling.” Cold Reg. Sci. Technol., 65(3), 401–412.
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©2018 American Society of Civil Engineers.
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Received: Oct 17, 2016
Accepted: Jan 18, 2018
Published online: Apr 6, 2018
Published in print: Jun 1, 2018
Discussion open until: Sep 6, 2018
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