Concrete Corrosion Cracking and Transverse Bar Strain Behavior in a Reinforced Concrete Column under Simulated Marine Conditions

Choe, Gyeongcheol; Shinohara, Yasuji; Kim, Gyu-Yong; Lee, Sangkyu; Lee, Euibae; Nam, Jeongsoo

doi:10.3390/app10051794

Cited by 17 publications

(5 citation statements)

References 18 publications

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“…The durability of concrete in the marine environment is an important hidden danger to the safety of concrete structures. Among them, chloride ion penetration is one of the main reasons for the durability of concrete, and the effect of dry–wet alternation greatly accelerates the penetration of corrosive ions, and the tidal range area becomes the most serious area for concrete structure corrosion [ 3 , 4 , 5 , 6 , 7 ]. Therefore, it is of great significance to carry out research on the effect of concrete’s anti-chloride ion corrosion performance under dry–wet alternation action.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

Pang

Huang

2021

Materials

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In order to enhance the corrosion resistance of concrete to chloride salt, 5% NaCl solution was used to corrode ordinary concrete (OC) and rubber concrete (RC) with 5%, 10%, and 15% rubber content, respectively. By testing the compressive strength, mass, chloride ion concentration at different depths and relative dynamic elastic modulus, the erosion mechanism was analyzed by means of SEM scanning and EDS patterns, and the mechanical properties and deterioration degree of ordinary concrete (OC) and rubber concrete (RC) under the corrosion environment of chloride salt were studied. The results show that: the quality of rubber mixed into concrete increases first and then decreases, and rubber can increase the compressive strength of concrete, improve its internal structure. At the same time, the mechanical properties of concrete in the corrosion environment of chloride salt are improved to a certain extent, and the deterioration degree is reduced. Considering the comprehensive performance of OC and RC in the dry–wet alternation mechanism under chloride salt corrosion, the best content of rubber is 10%.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

Pang

Huang

2021

Materials

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“…At the junction of the elastic and plastic zones (r = R p ), the stresses σ r and σ θ should satisfy the unified strength theory equation, and should satisfy Equation (10), combined with Equations ( 10) and (13), by simplification to obtain:…”

Section: Theoretical Derivationmentioning

confidence: 99%

“…In this process, the computational equation for the depth of corrosion of the reinforcement at the moment of rust expansion and internal cracking was also established. Research was conducted to evaluate the concrete cracking and reinforcement strain behavior due to reinforcement corrosion by a systematic approach [10]. Penggang Wang et al [11] investigated the rationality of the concrete protective layer thickness measurement method and proposed predictive measures for structural life.…”

Section: Introductionmentioning

confidence: 99%

Safety Analysis of Rebar Corrosion Depth at the Moment of Corrosion-Induced Cover Cracking

et al. 2023

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Concrete cover cracking induced by reinforcement corrosion is an important indication of the durability limit state for reinforced concrete (RC) structures and can be used to determine the structural service life. The process of rebar corrosion from the beginning of rusting to the occurrence of cover cracking due to corrosion expansion can be divided into two phases: the phase of the free expansion of the corrosion product and the phase of cover cracking. Based on the assumption of the uniform corrosion of the reinforcement, one model for predicting the reinforcement corrosion depth from corrosion initiation to cover cracking was established according to the cylindrical cavity expansion theory. The main factors affecting the reinforcement corrosion depth were analyzed. The main factors affecting the corrosion depth of reinforcement were analyzed. The quantitative sensitivity analysis of the factors influencing the calculation formula shows that the depth of reinforcement corrosion and the thickness of the concrete protective layer are approximately linearly increasing, with a growth rate of 0.2366 μm/mm; the diameter of the reinforcement is approximately linearly decreasing, with a decrease rate of 0.2122 μm/mm; the volume expansion rate of rust is approximately power function decreasing; the overall influence range of the yield criterion selection parameter is 0.15 μm; for the concrete strength grade, the overall influence range is 0.1 μm. The coefficient of determination R2 is 0.87, and the overall accuracy of the calculated formula is high, which can be used to predict the service life of reinforced concrete structures and guide the durability design in combination with the research results on the corrosion rate of reinforcement under different environments.

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“…Many studies focused on the effects of chloride attack, on the performance of plain concrete. Furthermore, relevant advancements were carried out through many studies related to the analysis of the effects of corrosion in RC structures (Goharrokhi et al, 2019;Anxin et al, 2018;Choe et al, 2020;Andisheh et al, 2018;Ge et al, 2019;JIS), particularly in vertical RC members. For instance, Pelle et al (2021) investigated the long-term behavior of RC bridge columns.…”

Section: Introductionmentioning

confidence: 99%

Failure mechanisms of corroded/non-corroded RC cylinder under axial compressive loading evaluated by AE technique

Seye

Kawasaki²

2022

Front. Built Environ.

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This study applied the acoustic emission (AE) technique to investigate mechanical behaviors and failure processes of corroded and non-corroded reinforced concrete (RC) cylinders, subjected to compressive loading. RC cylinders with 150 mm diameter and 300 mm height were tested. A set of twelve specimens was arranged into four groups of three specimens. These were the specimens corroded at the initiation stage, at the acceleration stage, at the deterioration stage of rebars, and another group was prepared as non-corroded specimens. The other set of twelve specimen was corroded as the same as the one, but axial rebars were coated with epoxy resin. After performing electrical corrosion, by applying 200 mA current under salt water immersion of 3% chloride concentration, axial compression tests were conducted on all specimens up to failure, using the AE technique. The corrosion of rebars inside the cylinders trends to decrease the compressive load-carrying performance of the RC cylinders, with the occurrence of early damages during the axial compression test. The analysis of the measured AE parameters enabled the classification of the generated damages into shear-type and tensile-type damages, which provided a characteristic signature of the failure mechanism of the tested cylinders. Next, it provided a 3D visualization of the damage events location and evolution inside the cylinders. Then, it gave the means to correlate the damage process of the RC cylinders, with their specific condition related to their corrosion level, prior to the compression test.

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Concrete Corrosion Cracking and Transverse Bar Strain Behavior in a Reinforced Concrete Column under Simulated Marine Conditions

Cited by 17 publications

References 18 publications

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

Safety Analysis of Rebar Corrosion Depth at the Moment of Corrosion-Induced Cover Cracking

Failure mechanisms of corroded/non-corroded RC cylinder under axial compressive loading evaluated by AE technique

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