Experimental Characterization of Concrete-Epoxy Interfaces
Publication: Journal of Materials in Civil Engineering
Volume 20, Issue 4
Abstract
This study presents experimental procedures conducted to characterize the bond between concrete and fiber reinforced polymeric laminates. The experimental characterization was aimed at obtaining the softening of the concrete-epoxy interface (CEI) formed during the installation of these laminates. In particular, splitting tensile and three-point bending tests were used to determine the tensile strength , the size-effect fracture energy , and the cohesive fracture energy of two concrete-epoxy interfaces. The sensitivity of these properties to the type of epoxy, specimen geometry, and surface conditions was also investigated experimentally. From this study, it was found that the tensile strength and the cohesive fracture energy of plain concrete and the two concrete-epoxy interfaces under consideration are similar in magnitude. Conversely, the size-effect fracture energies of plain concrete and a CEI are up to 64% different. Experimental results indicate that the condition of the concrete surface is the principal factor affecting the size-effect fracture energy of a concrete-epoxy interface. Results also indicate that the size-effect fracture energy can be used to characterize and compare concrete-epoxy interfaces.
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Acknowledgments
This material is based upon work supported by the National Science Foundation under a CAREER Grant No. NSF0330592.
References
ACI. (2002). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI No. 440.2R-02, American Concrete Institute, 45.
ACI. (2007). “Fracture toughness testing of concrete, reported by ACI Committee 446.” ACI No. 446.XR, American Concrete Institute (draft report).
ASTM. (2005a). “Standard test method for splitting tensile strength of cylindrical concrete specimens.” Annual book of ASTM standards, C496/C496M, Vol. 04.02.
ASTM. (2005b). “Standard test method for tensile properties of plastics.” Annual book of ASTM standards, D638, Vol. 08.01.
Bažant, Z. P., and Oh., B. H. (1983). “Crack band theory for fracture of concrete.” Mater. Constr. (Paris), 16(3), 155–177.
Bažant, Z. P., and Planas, J. (1998). Fracture and size effect in concrete and other quasibrittle materials, CRC, Boca Raton, Fla.
Bažant, Z. P., Yu, Q., and Zi, G. (2002). “Choice of standard fracture test for concrete and its statistical evaluation.” Int. J. Fract., 118(4), 303–337.
Bizindavyi, L., and Neale, K. W. (1999). “Transfer lengths and bond strengths for composites bonded to concrete.” J. Compos. Constr., 3(4), 153–160.
Boyajian, D. M., Davalos, J. F., and Ray, I. (2005). “Appraisal of the novel single contoured-cantilever beam.” Mater. Struct., 38(275), 11–16.
Buyukozturk, O., Gunes, O., and Karaca, E. (2004). “Progress on understanding debonding problems in reinforced concrete and steel members strengthened using FRP composites.” Constr. Build. Mater., 18(1), 9–19.
Chajes, M. J., Finch, W. W. J., Januszka, T. F., and Thomson, T. A. J. (1996). “Bond and force transfer of composite material plates bonded to concrete.” ACI Struct. J., 93(2), 208–217.
Chen, J. F., and Teng, J. G. (2001). “Anchorage strength models for FRP and steel plates bonded to concrete.” J. Struct. Eng., 127(7), 784–791.
Coronado, C. A. (2006). “Characterization, modeling and size effect of concrete-epoxy interfaces.” Ph.D. thesis, Pennsylvania State Univ., University Park, Pa.
Coronado, C. A., and Lopez, M. M. (2005). “Modeling of FRP-concrete bond using nonlinear damage mechanics.” Proc., FRPRCS-7 7th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, Vol. 2, SP-230, American Concrete Institute, Farmington Hills, Mich., 373–390.
Coronado, C. A., and Lopez, M. M. (2006). “Sensitivity analysis of reinforced concrete beams strengthened with FRP laminates.” Cem. Concr. Compos., 28(1), 102–114.
De Lorenzis, L., Miller, B., and Nanni, A. (2001). “Bond of fiber-reinforced polymer laminates to concrete.” ACI Mater. J., 98(3), 256–264.
Elices, M., Guinea, G. V., Gomez, J., and Planas, J. (2002). “The cohesive zone model: Advantages, limitations and challenges.” Eng. Fract. Mech., 69(2), 137–163.
Fyfe Co. LLC. (2005–2006 ). “Fyfe Co. LLC products—Tyfo®Epoxies—Tyfo S, saturant epoxy.” ⟨http//www.fyfeco.com/products/epoxies/pdf/s.pdf⟩ (January 2006).
Giurgiutiu, V., Lyons, J., Petrou, M., Laub, D., and Whitley, S. (2001). “Fracture mechanics testing of the bond between composite overlays and a concrete substrate.” J. Adhes. Sci. Technol., 15(11), 1351–1371.
Granju, J.-L., Sabathier, V., Turatsinze, A., and Toumi, A. (2004). “Interface between an old concrete and a bonded overlay: Debonding mechanism.” Interface Sci., 12(4), 381–388.
Hillerborg, A. (1985). “Results of three comparative test series for determining the fracture energy of concrete.” Mater. Struct., 18(107), 407–413.
Hillerborg, A., Modeer, M., and Petersson, P. (1976). “Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements.” Cem. Concr. Res., 6(6), 773–782.
Karbhari, V. M., and Engineer, M. (1996). “Investigation of bond between concrete and composites: Use of a peel test.” J. Reinf. Plast. Compos., 15(2), 208–227.
Lu, X., Teng, J., Ye, L., and Jiang, J. (2005). “Bond-slip models for FRP sheets/plates bonded to concrete.” Eng. Struct., 27(6), 920–937.
Lubliner, J., Oliver, J., Oller, S., and Onate, E. (1989). “Plastic-damage model for concrete.” Int. J. Solids Struct., 25(3), 299–326.
McSweeney, B. M., and Lopez, M. M. (2005). “FRP-concrete bond behavior: A parametric study through pull-off testing.” Proc., 7th Int. Symp. on Non-Metallic Fiber Reinforced Polymer Composite Reinforcement for Concrete Structures, FRPRCS-7, Vol. 2, SP-230, American Concrete Institute, Farmington Hills, Mich., 441–460.
Mukhopadhyaya, P., Swamy, R. N., and Lynsdale, C. J. (1998). “Influence of aggressive exposure conditions on the behaviour of adhesive bonded concrete-GFRP joints.” Constr. Build. Mater., 12(8), 427–446.
Petersson, P. E. (1981). “Crack growth and development of fracture zones in plain concrete and similar materials.” Rep. No. TVBM-1006, Division of Building Materials, Lund Institute of Technology, Lund, Sweden.
Planas, J., and Elices, M. (1990). “Fracture criteria for concrete. Mathematical approximations and experimental validation.” Proc., Engineering Fracture Mechanics Int. Conf. on Fracture and Damage of Concrete and Rock and Special Seminar on Large Concrete Dam Structures, Pergamon Press, Elmsford, N.Y., Vol. 35(1–3), 87–94.
Planas, J., Guinea, G. V., and Elices, M. (1999). “Size effect and inverse analysis in concrete fracture.” Int. J. Fract., 95(1–4), 367–378.
Qiao, P., and Xu, Y. (2004). “Evaluation of fracture energy of composite-concrete bonded interfaces using three-point bend tests.” J. Compos. Constr., 8(4), 352–359.
Rocco, C., Guinea, G. V., Planas, J., and Elices, M. (1999). “Mechanisms of rupture in splitting tests.” ACI Mater. J., 96(1), 52–60.
Rocco, C., Guinea, G. V., Planas, J., and Elices, M. (2001). “Review of the splitting-test standards from a fracture mechanics point of view.” Cem. Concr. Res., 31(1), 73–82.
Taljsten, B. (1996). “Strengthening of concrete prisms using the plate-bonding technique.” Int. J. Fract., 82, 253–266.
Yao, J., Teng, J. G., and Chen, J. F. (2005). “Experimental study on FRP-to-concrete bonded joints.” Composites, Part B, 36(2), 99–113.
Yuan, H., Teng, J. G., Seracino, R., Wu, Z. S., and Yao, J. (2004). “Full-range behavior of FRP-to-concrete bonded joints.” Eng. Struct., 26(5), 553–565.
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© 2008 ASCE.
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Received: Jul 20, 2006
Accepted: Jun 8, 2007
Published online: Apr 1, 2008
Published in print: Apr 2008
Notes
Note. Associate Editor: Houssam A. Toutanji
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