Title:
Effects of Sodium Chloride and Sulfate on Glass Fiber- Reinforced Polymer Bars
Author(s):
Manuel A. G. Silva, Fernando F. S. Pinho, and Miguel M. Estêvão
Publication:
Materials Journal
Volume:
115
Issue:
3
Appears on pages(s):
401-411
Keywords:
durability; glass fiber-reinforced polymer (GFRP) bars; porosity; sodium chloride; sulfate
DOI:
10.14359/51701922
Date:
5/1/2018
Abstract:
This study focuses on environmental degradation of glass fiber reinforced polymer (GFRP) bars after ingress of 1) salt water; or 2) solution of chlorides and sulfates and characterization of observed damage along 1 year of immersion of both bare bars and bars embedded in concrete and lime mortar. Published results on these topics are scarce. This study employed techniques more common in areas other than structural engineering, such as scan electronic microscopy, X-ray fluorescence, porosimetry, and diffusion, supplemented by impact tests at low velocity. Results showed: 1) approximately
Fickian behavior for GFRP and protective mortars until 1600 hours; and 2) importance of ionic diffusivity and radii in mass
gain due to sorption of the solutions, especially in the mortars. It was found that contamination affected the distribution of pore sizes and decreased the relative number of larger pores. Average open porosity decreased 17% after 5800 hours in salt water, and 15% in the sodium chloride and sulfate solution. Vitreous glass temperature transition experienced negligible changes. Bars’ energy absorption for impact was especially reduced after saltwater exposure and linked to severe degradation of the resin matrix.
Related References:
1. ACI Committee 440, “Guide for the Design and Construction of Concrete Reinforced with FRP Bars (ACI 440.1R-03),” American Concrete Institute, Farmington Hills, MI, 2003.
2. “FRP Reinforcement in RC Structures,” fib Bulletin 40, International Federation for Structural Concrete, Lausanne, Switzerland, 2007.
3. Malvar, L. J., ed., “Literature Review of Durability of Composites in Reinforced Concrete,” Special Publication SP-2008-SHR, Naval Facilities Engineering Service Center, Port Hueneme, CA, 1996, pp. 1-26.
4. Ceroni, F.; Cosenza, E.; Gaetano, M.; and Pecce, M., “Durability Issues of FRP Rebars in Reinforced Concrete Members,” Cement and Concrete Composites, V. 28, No. 10, 2006, pp. 857-868. doi: 10.1016/j.cemconcomp.2006.07.004
5. Demis, S.; Pilakoutas, K.; and Apostolopoulos, C. A., “Effect of Corrosion on Bond Strength of Steel and Non-Metallic Reinforcement,” Materials and Corrosion, V. 61, No. 4, 2010, pp. 328-331. doi: 10.1002/maco.200905324
6. Micelli, F., and Nanni, A., “Durability of FRP Bars for Concrete Structures,” Construction and Building Materials, V. 18, 2004, pp. 491-503. doi: 10.1016/j.conbuildmat.2004.04.012
7. Chen, Y.; Davalos, J. F.; and Ray, I., “Durability Prediction for GFRP Reinforcing Bars Using Short-Term Data of Accelerated Aging Tests,” Journal of Composites for Construction, ASCE, V. 10, No. 4, 2006. doi: 10.1061/(ASCE)1090-0268(2006)10:4(279)
8. Robert, M., and Benmokrane, B., “Effect of Aging on Bond of GFRP Bars Embedded in Concrete,” Cement and Concrete Composites, V. 32, No. 6, 2010, pp. 461-467.
9. Chen, Y.; Davalos, J. F.; Ray, I.; and Hyeong-Yeol, K., “Accelerated Aging Tests for Evaluations of Durability Performance of FRP Reinforcing Bars for Concrete Structures,” Composite Structures, V. 78, 2007, pp. 101-111. doi: 10.1016/j.compstruct.2005.08.015
10. Aiello, M. A., and Ombres, L., “Environmental Effects on the Mechanical Properties of Glass-FRP and Aramid-FRP Rebars,” Mechanics of Composite Materials, V. 36, No. 5, 2000.
11. Masmoudi, R. B.; Nkurunziza, G. C.; Benmokrane, B.; and Cousin, D., “Durability of Glass FRP Composite Bars for Concrete Structure Reinforcement under Tensile Sustained Load in Wet and Bare Bars Environments,” Congrès annuel de la Société canadienne de génie civil, Moncton, NB, Canada, June 4-7, 2003, pp. GCA400-1/9.
12. Dehwah, H. A. F.; Maslehuddin, M.; and Austin, S. D., “Long-Term Effect of Sulfate Ions and Associated Cation Type on Chloride-Induced Reinforcement Corrosion in Portland Cement Concretes,” Cement and Concrete Composites, V. 24, No. 1, 2002, pp. 17-25. doi: 10.1016/S0958-9465(01)00023-3
13. Ba, M.; Qian, C.; and Zhuang, Y., “Effects and Mechanism of Atmospheric Multi-Acidic Gases on Cement-Based Concrete Linings of Vehicle Tunnels,” Construction and Building Materials, V. 29, 2012, pp. 438-443. doi: 10.1016/j.conbuildmat.2011.09.016
14. Silva, M. A. G.; Cunha, P.; Pinho Ramos, A.; Sena da Fonseca, B.; and Pinho, F. F. S., “Accelerated Action of External Sulfate and Chloride to Study Corrosion of Tensile Steel in Reinforced Concrete,” Materiales de Construcción, V. 67, No. 328, 2017, pp. 1-10.
15. Gangarao, H. V. S., and Vijay, P. V., “Aging of Structural Composites under Varying Environmental Conditions—Non-Metallic (FRP) Reinforcement for Concrete Structures,” Proceedings of the 3rd International Symposium, V. 2, Sapporo, Japan, Oct. 1997, pp. 91-98.
16. Saadatmanesh, H., and Tannous, F., “Durability of FRP Rebars and Tendons,” Non-Metallic (FRP) Reinforcement for Concrete Structures, Proceedings of the 3rd International Symposium, V. 2, Sapporo, Japan, Oct. 1997, pp. 147-154.
17. NP EN 197-1 “Métodos de Ensaio de Cimentos.Determinação do Teor em Cloretos, Dióxido de Carbono e Álcalis nos Cimentos,” Portuguese Quality Institute, Lisboa, Portugal, 2001, 35 pp. (in Portuguese)
18. Kim, Y.-Y.; Lee, K.-M.; Bang, J.-W.; and Kwon, S.-J., “Effect of W/C Ratio on Durability and Porosity in Cement Mortar with Constant Cement Amount,” Advances in Materials Science and Engineering, V. 2014, 2014, doi: 10.1155/2014/273460
19. Milligen, B. P.; Bons, P. D.; Carreras, B. A.; and Sánchez, R., “On the Applicability of Fick’s Law to Diffusion in Inhomogeneous Systems,” European Journal of Physics, V. 26, No. 5, 2005, pp. 913-925. doi: 10.1088/0143-0807/26/5/023
20. Micelli, F., and Nanni, A., “Mechanical Properties and Durability of FRP Bars,” CIES 00-22, Missouri University of Science and Technology, Rolla, MO, 2001.
21. Silva, M. A. G., “Influence of Environmental Aging on Properties of Polymeric Mortars,” Journal of Materials in Civil Engineering, ASCE, V. 16, No. 5, 2004, pp. 461-468. doi: 10.1061/(ASCE)0899-1561(2004)16:5(461)
22. Johannesson, B.; Yamada, K.; Nilsson, L.-O.; and Hosokawa, Y., “Multi-Species Ionic Diffusion in Concrete with Account to Interaction Between Ions in the Pore Solution and the Cement Hydrates,” Materials and Structures, V. 40, No. 7, 2007, pp. 651-665. doi: 10.1617/s11527-006-9176-y
23. Samson, E.; Marchand, J.; and Snyder, K. A., “Calculation of Ionic Diffusion Coefficients on the Basis of Migration Test Results,” Materials and Structures, V. 36, No. 257, Apr. 2003, pp. 156-165.
24. Silva, M. A. G., and Silva, Z. C. G., “Degradation of Mechanical Characteristics of Some Polymeric Mortars due to Aging,” ACI Materials Journal, V. 104, No. 4, July-Aug. 2007, pp. 337-343.
25. Chin, J. W.; Nguyen, T.; and Aouadi, K., “Effects of Environmental Exposure on Fiber-Reinforced Plastic (FRP) Materials Used in Construction,” Journal of Composites Technology and Research, V. 19, No. 4, 1997, pp. 205-213.
26. Sawpan, M. A., “Effects of Alkaline Conditioning and Temperature on the Properties of Glass Fiber Polymer Composite Rebar,” Polymer Composites, v. 37, No. 11, Nov. 2016, pp. 3181-3190.
27. Maes, M., and De Belie, N., “Resistance of Concrete and Mortar against Combined Attack of Chloride and Sodium Sulphate,” Cement and Concrete Composites, V. 53, 2014, pp. 59-72. doi: 10.1016/j.cemconcomp.2014.06.013
28. EN 1936, “Determination of Real Density and Apparent Density and of Total and Open Porosity,” Comité Européen de Normalisation, Brussels, Belgium, 2008, 9 pp.
29. Papayianni, I., and Stefanidou, M., “Strength-Porosity Relationships in Lime-Pozzolan Mortars,” Construction and Building Materials, V. 20, No. 9, 2006, pp. 700-705. doi: 10.1016/j.conbuildmat.2005.02.012
30. Kumar, R., and Bhattacharjee, B., “Porosity, Pore Size Distribution and In Situ Strength of Concrete,” Cement and Concrete Research, V. 33, No. 1, 2003, pp. 155-164. doi: 10.1016/S0008-8846(02)00942-0
31. Dejke, V., “Durability of FRP Reinforcement in Concrete,” thesis for licentiate in engineering, Chalmers University, Gothenburg, Sweden, 2001, 225 pp.
32. Estêvão, M. M., “Durability of GFRP Bars to Strengthen Concrete Structures,” MSc thesis, Universidade Nova de Lisboa, Lisboa, Portugal, 2017, pp. 36-38. (in Portuguese)
33. ASTM D7028-15, “Standard Test Method for Glass Transition Temperature of Polymer Matrix Composites by Dynamic Mechanical Analysis (DMA),” ASTM International, West Conshohocken, PA, 2015, 14 pp.
34. Almusallam, T.; Al-Salloum, Y.; Alsayed, A.; El-Gamal, S.; and Aqel, M., “Tensile Properties Degradation of Glass Fiber-Reinforced Polymer Bars Embedded in Concrete under Severe Laboratory and Field Environmental Conditions,” Journal of Composite Materials, ASCE, V. 47, No. 4, 2012, pp. 393-407. doi: 10.1177/0021998312440473
35. Fernández-Canteli, A.; Argüelles, A.; Viña, J.; Ramulu, M.; and Kobayashi, A. S., “Dynamic Fracture Toughness Measurements in Composites by Instrumented Charpy Testing: Influence of Aging,” Composites Science and Technology, V. 62, No. 10-11, 2002, pp. 1315-1325. doi: 10.1016/S0266-3538(02)00074-X
36. ASTM D6110-08, “Standard Test Method for Determining the Charpy Impact Resistance of Notched Specimens of Plastics,” ASTM International, West Conshohocken, PA, 2008, 17 pp.
37. Poursartip, D. D., “Energy-Based Approach to Impact Damage in CRFP Laminates,” Composites. Part A, Applied Science and Manufacturing, V. 28, No. 7, 1997, pp. 647-655.