Corrosion of Reinforcing Steel in Fiber Reinforced Cementitious Composites

Mihashi, Hirozo; Shaikh, Faiz Uddin Ahmed; Kobayakawa, A.

doi:10.3151/jact.9.159

Cited by 73 publications

(45 citation statements)

References 12 publications

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“…Based on the above, the performance of a structure has been confirmed to improve through the use of HPFRCC as the construction material, and this material is expected to be used widely in the future. However, there has been little research on the durability of HPFRCC particularly against attacks from chloride and carbonation (Sanjuan et al 1997;Lawler et al 2002;Maalej et al 2003;Martinola et al 2004;Mihashi et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Durability against Steel Corrosion of HPFRCC with Bending Cracks

Miyazato

Hiraishi²

2013

ACT

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High Performance Fiber Reinforced Cementitious Composites (HPFRCC) develop micro-cracks under bending load. This study clarifies durability against steel corrosion in HPFRCC. Specimens made of HPFRCC or normal mortar with cracks were cured in a chloride or CO 2 environment and chloride ingress or carbonation progress was evaluated. The corrosion cell formation pattern and rate were also compared between HPFRCC and normal mortar, and their mechanism was discussed. The multiple cracks in HPFRCC were focused on in particular. It was found that chloride ingress and carbonation progress occur at many spots in HPFRCC, and that the advantage of HPFRCC against corrosion is due not only to the crack width but also the cracking pattern itself, which causes microcells instead of macrocells. From the above results, it was confirmed that the durability of HPFRCC against chloride or carbonation induced corrosion is higher than that of normal mortar.

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Section: Introductionmentioning

confidence: 99%

Durability against Steel Corrosion of HPFRCC with Bending Cracks

Miyazato

Hiraishi²

2013

ACT

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“…They found that the crack-bridging capacity of the fiber in specimens that are placed in a marine-like environment is increased by corrosion. Sadeghi-Pouya et al and Mihashi et al [12,13] investigated that steel fibers in cylinder specimens show less damage than the normal bar in these samples. Moreover, the Flexural performance of specimens with corroded steel fiber is not decreased by corrosion attack.…”

Section: Comparison Of Steel Bar and Steel Fiber Corrosionmentioning

confidence: 99%

“…Thus, steel fiber will be corroded before the steel bar and the corrosion of steel bar will be reduced or stopped. The rest of the steel fibers that is disconnected to the steel bar will be preserved by the concrete alkalinity [13]. Therefore, in pre-cracked (R+S)C beams, bonding between bar and cement past will be higher than the pre-cracked RC beams.…”

Section: Flexural Strength and Toughness Of Pre-cracked Beams In Marimentioning

confidence: 99%

Effect of Steel Fiber and Different Environments on Flexural Behavior of Reinforced Concrete Beams

et al. 2017

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Abstract:The main kind of deterioration in marine Reinforced Concrete (RC) structures and other infrastructures is steel bar corrosion due to cracks in concrete surfaces, which leads to the reduction of the load carrying capacity, ductility, and structural safety. It seems that steel fibers can reduce and delay the cracking, and increase the flexural strength and ductility of marine RC structures. To do so, in marine atmosphere and the tidal zone of the Oman Sea and fresh water, the flexural behavior of beams containing Plain Concrete (PC), Concrete with Steel fiber Reinforcement (SFRC), RC, Concrete with Steel fiber, and bar Reinforcement ((R+S)C) at 28, 90 and 180 days were determined. Beams were 99 un-cracked and pre-cracked beams, with dimensions of 200 × 200 × 750 mm. Based on results and at 180 days, the flexural strength and toughness of pre-cracked (R+S)C beams were 22-43% higher than the pre-cracked RC beams. The effect of steel fiber on the increment of load capacity and the toughness of pre-cracked RC beams were approximately the same. By addition of steel fiber to un-cracked RC beams, load capacity and toughness were increased up to 20%. The load capacity and toughness in marine atmosphere and tidal zone were approximately 15% lower than the fresh water condition.

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“…Sanjuan et al (1997) reported that FRCC containing only 0.5 vol.% of polypropylene with W/C=0.5 demonstrated an ability for self-healing of cracks under a corrosive environment. Mihashi et al (2011) reported the results of a series of long-term corrosion tests on FRCC containing PE alone and hybrid fiber (i.e. mix of steel cord and polyethylene: SC+PE).…”

Section: Engineering With Fiber Reinforcementmentioning

confidence: 99%

“…The recovery in deflection capacity and stiffness was found to range between 65% and 105% in virgin specimens, significantly higher compared to the specimens without benefit of the self-healing process. Mihashi et al (2011) declared FRCC to have better resistance against corrosion of steel bars than mortar because of the fiber bridging of cracks and the self-healing of some of the cracks. fibers achieves more effective self-healing.…”

Section: Introductionmentioning

confidence: 99%

Advances in Self-healing Cementitious Materials

2012

ACT

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PrefaceThis special issue is aiming at summarizing recent progress in self-healing cementitious materials and at motivating further development in the relevant research. It took a long time since the efforts to develop self-healing materials working as intelligent materials drew strong attention worldwide in the research communities. Research and development of self-healing performance have been progressing on varieties of materials including metals, non-metals, inorganic and organic materials, and composite materials. Particularly for cement-based materials, based on the background of epoch-making ideas and existing research results, it has become possible to introduce some self-healing functions and their combined mechanisms. These self-healing cementitious materials have potentials to renovate existing structural designs and maintaining schemes and contribute to service life extension and environmental impact reduction. We expect this special issue could support to realize the potential.This special issue was worked out under a strong support of JCI Technical Committee on Self-healing / Repairing Technology in Cement-based Materials (JCI TC-091) chaired by Prof. S. Igarashi, Kanazawa University. This committee's activities included 1) quantitative evaluation of self-healing performance such as water leakage control and loading damage recovery, 2) investigation into self-healing mechanism, and 3) application of non-destructive test to identify self-healing results. Committee members of the TC are listed below.Koichi Maekawa, Editor-in-Chief of ACT TC-091 committee members AbstractReinforced concrete (RC) structures in marine environments are generally affected by harsh marine environmental actions, resulting in early performance degradation mainly due to chloride-induced deterioration. In such conditions, corrosion of rebar progresses rapidly, and also the cross-sectional area of rebar is reduced and consequently structural performance of RC structures will be degraded. In contrast, the surface of concrete structures is often covered with many marine sessile organisms under marine tidal and submerged conditions. These marine sessile organisms have been empirically known to enhance the durability of concrete though the effectiveness is not appropriately evaluated. This paper describes the long-term resistance of concrete with marine sessile organisms to chloride ion penetration in concrete. The effect and its sustainability of marine sessile organisms on chloride ion penetration in concrete were investigated through field exposure tests and laboratory tests. From the test results, the basal membrane, which is a matrix of marine sessile organisms, adheres to concrete strongly on a long-term basis though some gaps between concrete and the basal membrane can be observed. In addition, experimental results and simplified simulation clarified that the attachment of marine sessile organisms can enhance the long-term resistance of concrete to chloride ion penetration.

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Corrosion of Reinforcing Steel in Fiber Reinforced Cementitious Composites

Cited by 73 publications

References 12 publications

Durability against Steel Corrosion of HPFRCC with Bending Cracks

Durability against Steel Corrosion of HPFRCC with Bending Cracks

Effect of Steel Fiber and Different Environments on Flexural Behavior of Reinforced Concrete Beams

Advances in Self-healing Cementitious Materials

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