Tensile Properties Deterioration of BFRP Bars in Real Seawater Sea-sand Concrete Pore Solution Immersion Environment
ZHU Deju1,2,*, CHU Kaidan1, GUO Shuaicheng1,2, SHI Caijun1
1 Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, College of Civil Engineering, Hunan University, Changsha 410082, China 2 International Science Innovation Collaboration Base for Green & Advanced Civil Engineering Materials of Hunan Province, Hunan University, Changsha 410082, China
Abstract: In order to study the long-term mechanical properties of basalt fiber reinforced polymer (BFRP) bars in seawater sea-sand concrete (SSC) environment, this paper investigates the evolution of BFRP bar tensile properties immersed in real SSC pore solution environment. Soaking solutions based on normal seawater cement slurry pore solution (NA) and low alkalinity seawater cement slurry pore solution (LA) were prepared by pore solution extrusion and ion concentration analysis, and the test results were also compared with those in ACI 440.3R specification recommended soaking solution (ACI) through accelerated aging. The BFRP bars prepared with epoxy resin (B/E bars) and vinyl ester resin (B/V bars) were utilized in the tests. The change of tensile mechanical property of BFRP bars was evaluated by tensile tests after accelerated aging at different temperatures and immersion durations, and the degradation mechanism was analyzed by using microstructural characterization. The test results showed that reducing the alkalinity of the pore solution was more effectively than reducing the chloride ion concentration for delaying the degradation of long-term mechanical property of BFRP bars, and the effect of increasing temperature on the mechanical property degradation of B/V bars was more significant than that of B/E bars. The tensile strength degradation of BFRP bars during aging process was higher than their elastic modulus. Meanwhile the difference in elastic modulus of B/E bars before and after accelerated aging in the three environments was not significant. The corrosion resistance of vinyl resin was better than that of epoxy resin, but its weaker interfacial properties with basalt fibers resulted in worse durability of B/V bars than that of B/E bars in the simulated SSC pore solution.
通讯作者:
*朱德举,湖南大学教授、博士研究生导师,国家海外青年高层次人才,湖南省芙蓉学者特聘教授。长期从事高性能可持续土木工程复合材料及仿生结构材料研究,近年来,主持国家和省部级科研项目10余项(包括国家自然科学基金山东联合基金重点项目、面上项目、国防科技创新特区项目、装备预研教育部联合基金项目等)。在Cement and Concrete Composites、《土木工程学报》等国内外高水平期刊发表学术论文170余篇。dzhu@hnu.edu.cn
引用本文:
朱德举, 初开丹, 郭帅成, 史才军. 基于海水海砂混凝土真实孔溶液浸泡环境下BFRP筋拉伸性能的退化[J]. 材料导报, 2024, 38(11): 23030043-8.
ZHU Deju, CHU Kaidan, GUO Shuaicheng, SHI Caijun. Tensile Properties Deterioration of BFRP Bars in Real Seawater Sea-sand Concrete Pore Solution Immersion Environment. Materials Reports, 2024, 38(11): 23030043-8.
1 Dong Z Q, Wu G, Xu Y Q. Construction and Building Materials, 2016, 115, 277. 2 Zhang L Z, Sun Y M, Xiong W. Materials and Structures, 2014, 48 (10), 3279. 3 Xu K, Lu C H, Xuan G Y, et al. Materials Reports, 2021, 35(4), 4053 (in Chinese). 徐可, 陆春华, 宣广宇, 等. 材料导报, 2021, 35(4), 4053. 4 Tomlinson D, Fam A. Journal of Composites for Construction, 2015, 19 (2), 04014036. 5 Uomoto T, Mutsuyoshi H, Katsuki F, et al. Journal of Materials in Civil Engineering, 2002, 14 (3), 191. 6 Benmokrane B, Elgabbas F, Ahmed E A, et al. Journal of Composites for Construction, 2015, 19 (6), 04015008. 7 Elgabbas F, Ahmed E A, Benmokrane B. Construction and Building Materials, 2015, 95, 623. 8 Ali A H, Mohamed H M, Benmokrane B, et al. Composites Part B: Engineering, 2019, 157, 248. 9 ASTM D7705/D7705M-12. Standard test method for alkali resistance of fiber reinforced polymer (FRP) matrix composite bars used in concrete construction, West Conshohocken, PA, USA, 2012. 10 ACI 440.3R. Guide test methods for fiber-reinforced polymers (FRPs) for reinforcing or strengthening concrete structures, American Concrete Institute, Farmington Hills, Michigan, 2012. 11 Serbescu A, Guadagnini M, Pilakoutas K. Journal of Composites for Construction, 2015, 19(2), 04014037. 12 Li Y L, Zhao X L, Singh Raman R K, et al. Construction and Building Materials, 2018, 159, 704. 13 Zhu N S, Jin F N, Kong X L, et al. Construction and Building Mate-rials, 2018, 188, 1085. 14 Xiao J Z, Qiang C B, Nanni A, et al. Construction and Building Mate-rials, 2017, 155, 1101. 15 Geng J Z, Zhu D J, Guo S C, et al. Materials Reports, 2022, 36(3), 21010189 (in Chinese). 耿健智, 朱德举, 郭帅成, 等. 材料导报, 2022, 36(3), 21010189. 16 Cau Dit Coumes C, Courtois S, Nectoux D, et al. Cement and Concrete Research, 2006, 36(12), 2152. 17 Li S, Yin J, Zhang G. Construction and Building Materials, 2020, 249, 118775. 18 Hang T L P, Verdier J, Vidal T, et al. European Journal of Environmental and Civil Engineering, 2017, 23(6), 657. 19 Wang Z K, Zhao X L, Xian G J, et al. Construction and Building Materials, 2017, 156, 985. 20 Wu G, Wang X, Wu Z S, et al. Science and Engineering of Composite Materials, 2015, 22(6), 649. 21 Wu G, Dong Z Q, Wang X, et al. Journal of Composites for Construction, 2015, 19(3), 04014058. 22 Guo F, Al-Saadi S, Singh R R K, et al. Corrosion Science, 2018, 141, 1. 23 Behnood A, Van Tittelboom K, De Belie N. Construction and Building Materials, 2016, 105, 176. 24 Yi Y, Guo S C, Li S, et al. Construction and Building Materials, 2021, 299, 123957. 25 Yi Y, Zhu D J, Guo S C, et al. Cement and Concrete Composites, 2022, 134, 104778. 26 Wu G, Zhu Y, Dong Z Q, et al. China Civil Engineering Journal, 2014, 47(8), 32 (in Chinese). 吴刚, 朱莹, 董志强, 等. 土木工程学报, 2014, 47(8), 32. 27 Li S, Guo S C, Yi Y, et al. Construction and Building Materials, 2021, 307, 124650.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2024, Vol. 38 
