Tensile and low-cycle fatigue performance of bimetallic steel bars with corrosion

Hua, Jianmin; Fan, Haifeng; Xue, Xuanyi; Wang, Fei; Chen, Zengshun; Huang, Lifang; Wang, Neng

doi:10.1016/j.jobe.2021.103188

Cited by 19 publications

(7 citation statements)

References 30 publications

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“…Investigations into the mechanical properties of coated bars after corrosion have been more recent [ 33 , 39 , 70 , 133 , 134 ]. Ismail and Muhammad [ 70 ] tested the tensile behavior of corroded GRs.…”

Section: Behavior After Corrosionmentioning

confidence: 99%

“…Zhou et al [ 137 ] reported the corrosion rate of carbon-type SFCB was less than 1/10 of BSR, and that of glass-type SFCB was less than 1/100 of BSR. Hua et al conducted electrochemical accelerated corrosion tests for SCRs [ 33 , 134 , 138 ] and reported that both apparent yield strength and ultimate strength of SCRs decreased after corrosion, but the reduction of yield strength was less than that of BSR. They also proposed predictive equations and a stress–strain model to clarify the corrosion performances and mechanical properties of artificially damaged SCRs with different corrosion ratios.…”

Section: Behavior After Corrosionmentioning

confidence: 99%

“…The degradation of SFCBs is generally expressed as a reduction of maximum strength [ 39 , 133 ]. After corrosion, SCRs also show degradation of ductility, but the degree of degradation is lower than for BSRs [ 33 , 134 ]. Figure 8 compares the partial tensile behaviors of BSRs, GRs, SFCBs, and SCRs.…”

Section: Behavior After Corrosionmentioning

confidence: 99%

“…However, a reduction of fatigue strength due to galvanization was reported when the number of cycles to failure was larger than 10 4 . Hua et al [ 134 , 139 ] investigated the corroded low-cycle fatigue performance of SCRs. SCRs were electronically corroded to a controlled degree.…”

Section: Behavior After Corrosionmentioning

confidence: 99%

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Anti-Corrosion Reinforcements Using Coating Technologies—A Review

et al. 2022

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Coated reinforcements are expected to improve the performance of reinforced concrete in aggressive environments, but different kinds of coated reinforcements can express a variety of properties, which can confuse researchers and engineers. This paper reviews the manufacture, corrosion mechanisms, behaviors, and applications of popular or promising coated reinforcements, incorporating galvanized reinforcements (GRs), epoxy coated reinforcements (ECRs), stainless cladding reinforcements (SCRs), and steel-fiber reinforced polymer composite bars (SFCBs). In terms of manufacture, GRs and ECRs should focus on minimizing the negative effect of manufacture on performance, while SCRs and SFCBs should reduce the cost and increase the production capacity. Behaviors of GRs and ECRs are primarily determined by the steel substrate, but the behaviors of SCRs and SFCBs are primarily affected by the coat and core, and their interaction. The corrosion mechanism of GRs and SCRs is about oxidation, while that of SFCBs is about hydrolysis. ECRs are usually corroded under film, which can be a cause of premature failure. Corrosion embrittles SCRs, as well as bare bars, but corrosion of SFCBs usually causes a reduction in maximum strength. The investigation of the corrosion behaviors of GRs and ECRs focuses on bond strength. GRs have controversial performance. ECRs have been proven to have drawbacks regarding bond strength. The use of anti-corrosion reinforcement is uneven in regions, which may correlate with the development of technology and the economy.

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Section: Behavior After Corrosionmentioning

confidence: 99%

Section: Behavior After Corrosionmentioning

confidence: 99%

Section: Behavior After Corrosionmentioning

confidence: 99%

Section: Behavior After Corrosionmentioning

confidence: 99%

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Anti-Corrosion Reinforcements Using Coating Technologies—A Review

et al. 2022

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“…As concrete pipes are buried structures, the cracks often go undetected [ 18 ]. The cracks pave the way for the corrosion of conventional steel bars by allowing chlorides to reach the surfaces of the bars [ 19 , 20 , 21 ]. The cracking of a concrete pipe can potentially lead to the final failure of the pipe and associated problems such as road accidents and inconvenience to the public ( Figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

Development of Concrete Mixture for Spun-Cast Full-Scale Precast Concrete Pipes Incorporating Bundled Steel and Polypropylene Fibers

2023

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Spin casting is the oldest method of manufacturing precast concrete pipes among all existing methods. While improved concrete mixtures incorporating fibers for other methods of concrete pipe manufacturing, such as the vibration method and roller compaction method, have been developed, no such concrete mixture has yet been developed for spun-cast concrete pipes. This study was designed to explore the possibility of incorporating locally manufactured steel fibers and commercially available polypropylene fibers to develop an improved concrete mixture for use in the manufacturing of full-scale spun-cast concrete pipes. The used steel fibers were of two types, i.e., straight and bundled steel fibers, manufactured by cutting locally available long straight and bundled steel wires, respectively. Various dosages of steel fibers (i.e., 20, 30, 40, and 50 kg/m3) and polypropylene fibers (i.e., 5, 10, 15, and 20 kg/m3) were used in mono and hybrid (steel and polypropylene) forms. The properties in the fresh state and mechanical properties of the test mixtures were investigated. Full-scale spun-cast concrete pipes having a 450 mm internal diameter were manufactured and tested using the three-edge bearing test. The compressive strength of the mixtures was largely insensitive to the dosage of the fibers. The splitting tensile strength of all fiber-reinforced concrete mixtures was higher than that of the reference mixture without fibers, with a 24% increase recorded for the concrete mixture incorporating 50 kg/m3 of bundled steel fibers relative to the reference mixture with no fibers. The flexural performance of the fiber-reinforced concrete mixtures was superior to that of the reference mixture without fibers in terms of flexural strength, toughness, residual strength, and crack control, with up to 28% higher flexural strength relative to the reference mixture without fibers. The three-edge bearing tests on full-scale spun-cast pipes incorporating steel fibers showed that the use of fibers is a promising alternative to the traditional steel cage in spun-cast concrete pipes.

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