Abstract
In this study, the chloride ion diffusion and structural performance of beams reinforced with textile-reinforced concrete (TRC) were evaluated. The parameters investigated were chloride concentration, sustained load and number of textile layers. The results demonstrate that the content and diffusion coefficient of chloride increased with increasing chloride concentration. Higher chloride concentrations accelerated the crack propagation and deflection changes and caused the reduction of the load-carrying capacity of the beams. The sustained load promoted the chloride transport of the TRC, increasing the chloride ion content and diffusion coefficient and causing substantial damage to the microstructure of the TRC. In addition, the performance (such as cracking resistance, deflection and flexural capacity) of beams with a large sustained load ratio decreased to a less extent than did the performance of the unloaded beams. The content and diffusion coefficient of chloride in the unstrengthened beams were obviously larger than those in the strengthened beams, but increasing the textile layers number had little influence on these factors. In addition, for the unstrengthened beams, the cracks and deflections developed rapidly, and the load decreased greatly, especially the cracking load. Finally, in accordance with Fick’s second law of diffusion, a chloride diffusion equation in TRC layers under new boundary conditions was proposed.
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Bournas DA, Pavese A, Tizani W (2014) Tensile capacity of FRP anchors in connecting FRP and TRM sheets to concrete. Engineering Structures 82:72–81, DOI: 10.1016/j.engstruct.2014.10.031
D’Ambrisi A, Focacci F (2011) Flexural strengthening of RC beams with cement based composites. Journal of Composites for Construction 15(5):707–720, DOI: 10.1061/(ASCE)CC.1943-5614.0000218
Delagrave A, Bigas JP, Ollivier JP, Marchand J, Pigeon M (1997) Influence of the interfacial zone on the chloride diffusivity of mortars. Advanced Cement Based Materials 5(3-4):86–92, DOI: 10.1016/S1065-7355(96)00008-9
Dong JF, Zhao YX, Wang K, Jin WL (2017) Crack propagation and flexural behaviour of RC beams under simultaneous sustained loading and steel corrosion. Construction and Building Materials 151:208–219, DOI: 10.1016/j.conbuildmat.2017.05.193
Elsanadedy HM, Almusallam TH, Alsayed SH, Al-Salloum YA (2013) Flexural strengthening of RC beams using textile reinforced mortar — Experimental and numerical study. Composite Structures 97:40–55, DOI: 10.1016/j.compstruct.2012.09.053
Farahani A, Taghaddos H, Shekarchi M (2015) Prediction of long-term chloride diffusion in silica fume concrete in a marine environment. Cement and Concrete Composites 59:10–17, DOI: 10.1016/j.cemconcomp.2015.03.006
Gopinath S, Murthy AR, Iyer NR (2016) Investigations on textile-reinforced concrete as cover for RC beams. Magazine of Concrete Research 68(20):1040–1050, DOI: 10.1680/jmacr.15.00161
Hobbs DW (1999) Aggregate influence on chloride ion diffusion into concrete. Cement and Concrete Research 29(12):1995–1998, DOI:10.1016/S0008-8846(99)00188-X
Ismail Z, Kuan KK, Khoo SY, Ong ZC (2014) Examining the trend in loss of flexural stiffness of simply supported RC beams with various crack severity using model updating. Measurement 50:43–49, DOI: 10.1016/j.measurement.2013.12.036
JTJ270-98 (1998) Testing code of concrete for port and waterwog engineering. JTJ270-98, China Communications Press, Beijing, China (in Chinese)
Julio GR, José MS, Pedro F, Jose X (2015) Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips. Composite Structures 132:331–340, DOI: 10.1016/j.compstruct.2015.05.053
Liang HJ, Li S, Lu YY, Yang T (2018) Reliability analysis of bond behaviour of CFRP concrete interface under wet-dry cycles. Materials 11(5):1–14, DOI: 10.3390/ma11050741
Lu CH, Yang J, Li H (2017) Experimental studies on chloride penetration and steel corrosion in cracked concrete beams under drying-wetting cycles. Journal of Materials in Civil Engineering 29(9):04017114, DOI: 10.1061/(ASCE)MT.1943-5533.0001953
Maaddawy TE (2008) Behavior of corrosion-damaged RC columns wrapped with FRP under combined flexural and axial loading. Cementand Concrete Composites 30(6):524–534, DOI: 10.1016/j.cemconcomp.2008.01.006
Mahmoud S, David T (2017) A time-variant model of surface chloride build-up for improved service life prediction. Cement and Concrete Composites 84:99–110, DOI: 10.1016/j.cemconcomp.2017.08.008
Midgley H, Illston J (1984) The penetration of chlorides into hardened cement pastes. Cement and Concrete Research 14(4):546–558, DOI: 10.1016/0008-8846(84)90132-7
Pellegrino C, D’ Antino T (2013) Experimental behaviour of existing precast prestressed reinforced concrete elements strengthened with cementitious composites. Composites Part B: Engineering 55:31–40, DOI: 10.1016/j.compositesb.2013.05.053
Petcherdchoo A (2013) Time dependent models of apparent diffusion coefficient and surface chloride for chloride transport in fly ash concrete. Construction and Building Materials 38:497–507, DOI: 10.1016/j.conbuildmat.2012.08.041
Petcherdchoo A (2018) Closed-form solutions for modeling chloride transport in unsaturated concrete under wet-dry cycles of chloride attack. Construction and Building Materials 176:638–651, DOI: 10.1016/j.conbuildmat.2018.05.083
Promis G, Gabor A, Maddaluno G, Hamelina P (2010) Behaviour of beams made in textile reinforced mineral matrix composites, an experimental study. Composite Structures 92(10):2565–2572, DOI: 10.1016/j.compstruct.2010.02.003
Sheng J, Yin SP, Wang, F, Yang Y (2017) Experimental study on the fatigue behaviour of RC beams strengthened with TRC after sustained load corrosion. Construction and Building Materials 131:713–720, DOI: 10.1016/j.conbuildmat.2016.11.030
Stroh J, Meng B, Emmerling F (2016) Deterioration of hardened cement paste under combined sulphate-chloride attack investigated by synchrotron XRD. Solid State Sciences 56:29–44, DOI: 10.1016/j.solidstatesciences.2016.04.002
Sun YM, Liang MT, Chang TP (2012) Time/depth dependent diffusion and chemical reaction model of chloride transportation in concrete. Applied Mathematical Modelling 36(3):1114–1122, DOI: 10.1016/j.apm.2011.07.053
Trapko T (2014) Effect of eccentric compression loading on the strains of FRCM confined concrete columns. Construction and BuildingMaterials 61:97–105, DOI: 10.1016/j.conbuildmat.2014.03.007
Vaysburd AM, Emmons PH (2004) Corrosion inhibitors and other protective systems in concrete repair: Concepts or misconcepts. Cementand Concrete Composites 26(3):255–263, DOI: 10.1016/S0958-9465(03)00044-1
Verbruggen S, Tysmans T, Wastiels J (2014) TRC or CFRP strengtheningfor reinforced concrete beams: An experimental study of the cracking behaviour. Engineering Structures 77:49–56, DOI: 10.1016/j.engstruct.2014.07.040
Verbruggen S, Tysmans T, Wastiels J (2016) Bending crack behaviour of plain concrete beams externally reinforced with TRC. Materials and Structures 49(12):5303–5314, DOI: 10.1617/s11527-016-0861-1
Xu J, Li FM, Zhao J, Huang L (2018) Model of time-dependent and stress-dependent chloride penetration of concrete under sustained axial pressure in the marine environment. Construction and Building Materials 170:207–216, DOI: 10.1016/j.conbuildmat.2018.03.077
Yin SP, Jing L, Yin MT, Wang B (2019) Mechanical properties of textile reinforced concrete under chloride wet-dry and freeze-thaw cycle environments. Cement and Concrete Composites 96:118–127, DOI: 10.1016/j.cemconcomp.2018.11.020
Yin SP, Na MW, Yu YL (2017) Research on the flexural performance of RC beams strengthened with TRC under the coupling action of load and marine environment. Construction and Building Materials 132:251–261, DOI: 10.1016/j.conbuildmat.2016.12.001
Yin SP, Xu SL, Lv HL (2014) Flexural behavior of reinforced concrete beams with TRC tension zone cover. Journal of Materials in Civil Engineering 26(2):320–330, DOI: 10.1061/(ASCE)MT.1943-5533.0000811
Yin SP, Yu YL, Yun PX (2018) Flexural performance of TRC-strengthened RC beam under chloride environment. Anti-Corrosion Methods and Materials 65(5):444–450, DOI: 10.1108/ACMM-09-2017-1850
Yu ZW, Cheng Y, Liu P, Wang WL (2015) Accelerated simulation of chloride ingress into concrete under drying-wetting alternation conditionchloride environment. Construction and Building Material 93:205–213, DOI: 10.1016/j.conbuildmat.2015.05.090
Zacchei E, Nogueira CG (2019) Chloride diffusion assessment in RC structures considering the stress strain state effects and crack width influences. Construction and Building Materials 201:100–109, DOI: 10.1016/j.conbuildmat.2018.12.166
Zhang JZ, Zhao J, Zhang YY, Gao YH, Zheng YY (2018) Instantaneous chloride diffusion coefficient and its time dependency of concrete exposed to a marine tidal environment. Construction and Building Materials 167:225–234, DOI: 10.1016/j.conbuildmat.2018.01.107
Zhou BB, Gu XL, Zhang WP, Jin XY, Huang QH (2010) Time-dependent reliability analysis of reinforced concrete beams subjected to bending and marine atmospheric environment. China Civil Engineering Journal 43(S2):15–21 (in Chinese)
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The authors gratefully acknowledge the financial support from the Jiangsu Provincial Key Research and Development Program (BE2019642).
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Yin, S., Hua, Y. & Yu, Y. Flexural Durability and Chloride Diffusion Equation of TRC-Strengthened Beams under a Chloride Environment. KSCE J Civ Eng 24, 1868–1880 (2020). https://doi.org/10.1007/s12205-020-1640-7
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DOI: https://doi.org/10.1007/s12205-020-1640-7