Study on Crack Models Caused by Pressure Due to Corrosion Products

Tsutsumi, Tomoaki; Matsushima, Manabu; Murakami, Yuji; Seki, Hiroshi

doi:10.2208/jscej.1996.532_159

Cited by 11 publications

(3 citation statements)

References 3 publications

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“…Additionally, water and oxygen penetrate through cracks and accelerate the corrosion. Controlling corrosion is the key to maintaining the durability of concrete [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Evaluation of Corrosion Protection of Reinforcing Steel Bars Using Sugars

Sakakihara¹

2023

GEOMATE

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This study reports the effect of adding sugars to prevent corrosion of reinforcing bars. The reducing sugars aldose (sugar with an aldehyde group) and, ketose (sugar with a ketone group), and a nonreducing sugar and syrup with an expiration date were used in the experiments. Fehling's reaction, Benedict's reaction, and cyclic voltammetry (CV) tests were performed to investigate the effects of the various sugars on the reductive ability. Because the electrochemical oxidation of sugars requires electrocatalysts, electrodes containing particulate CuO catalysts were used in the experiments. The CV measurements were performed under alkaline conditions to simulate a reinforcing bar in the concrete. The experimental results revealed the influence of different types of sugars on the reductive ability. In Fehling's reaction, fructose was observed to be highly reductive, and its reaction rate was high. In Benedict's reaction, results obtained for waste syrup (WS) were similar to those of fructose, thereby confirming that WS can be used as a reducing sugar. The oxidation onset potentials in the electrochemical experiments were lower for fructose, WS, and glucose, in that order, which was the same as the order of the reaction rates in Benedict's reaction.

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“…Additionally, water and oxygen penetrate through cracks and accelerate the corrosion. Controlling corrosion is the key to maintaining the durability of concrete [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Evaluation of Corrosion Protection of Reinforcing Steel Bars Using Sugars

Sakakihara¹

2023

GEOMATE

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“…Cracking or spalling of cover concrete reduces durability in terms of seismic performance, appearance-related serviceability, and functional safety of RC viaducts. Cracking and spalling also serve as effective indices for detecting rebar corrosion, and a number of studies relate the cracking mechanisms involved and the prediction of rebar corrosion [1]. The main focus of this research has been to reproduce the expansion of corroded rebars: using static expansive demolition agents, elastic materials, electrolytic corrosion of rebars, non-linear finite element method (FEM) [2] and rigid-body spring models (RBSM) [3].…”

Section: Introductionmentioning

confidence: 99%

<b>Evaluation of Crack Propagation in Cover Concrete of RC Viaducts Caused by Steel Corrosion</b>

et al. 2015

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Fractures in cover concrete on reinforced concrete (RC) viaducts is caused by the expansion of reinforced-bar due to corrosion. In order to understand the mechanisms behind these fractures cross-sections of a corroded rebar were evaluated using the equipment proposed in this paper. In addition, a series of experiments and non-linear finite element analyses were conducted to evaluate the effect of rebar spacing and cover-concrete thickness on the shape of cover concrete fractures and extent of corrosion.

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“…From the problems, the limit cor-roded mass cannot be solved since the actual resistant capacity of cover concrete has not yet been recognized. The ultimate pressure was only quantified from the experiment by the inducing of internal pressure, Noghabai (1998) and Tsutsumi et al (1996).…”

Section: Introductionmentioning

confidence: 99%

Test Method for Cracking Resistance of Cover Concrete due to Corrosion of Reinforcement

Piyamahant

Shima

2011

ACT

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Expansion of the rust volume produced from corrosion creates the radial pressure pressing the cylindrical wall around reinforcing bars. To simulate this radial pressure from the expanding rust, a new experiment method is introduced. By this method, the mechanical device has to be embedded in each specimen during casting concrete. This device transfers the applied force and the displacement from vertical axis to the pressure and the displacement in radial direction. Therefore, the radial pressure and the displacement pressing the cylindrical wall around the reinforcing bars can be determined from the applied force and the displacement in the vertical direction. Two mortar specimens with different covering thickness, 50 and 90mm, were tested in order to examine the behaviors of the crack in the thinnest cover direction. The experimental results from this new experiment method are shown and compared with the calculated results of elastic, elastic-partially cracked, and fully plastic theory. In comparison, the experimental results of radial pressure were found to be higher than the elastic and the elastic-partially cracked but lower than the plastic theory. Furthermore, it was found that both normalized forms of the ultimate radial pressure and the ultimate radial displacement have linear relationships with non-dimensional cover thickness.

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Study on Crack Models Caused by Pressure Due to Corrosion Products

Cited by 11 publications

References 3 publications

Electrochemical Evaluation of Corrosion Protection of Reinforcing Steel Bars Using Sugars

Electrochemical Evaluation of Corrosion Protection of Reinforcing Steel Bars Using Sugars

<b>Evaluation of Crack Propagation in Cover Concrete of RC Viaducts Caused by Steel Corrosion</b>

Test Method for Cracking Resistance of Cover Concrete due to Corrosion of Reinforcement

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