Corrosion behavior of tempered dual-phase steel embedded in concrete

Keleştemur, Oğuzhan; Yıldız, Servet; Aksoy, M.

doi:10.1016/s1674-4799(09)60008-x

Cited by 26 publications

(13 citation statements)

References 21 publications

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“…It has been found that steel bars with higher residual stress will corrode at a higher rate [20,21]. In Bangladesh, both the atmospheric temperature and humidity are high.…”

Section: Resultsmentioning

confidence: 99%

Hardened Case Properties and Tensile Behaviours of TMT Steel Bars

Kabir¹,

Islam²

2014

AJME

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Nowadays, high strength steels are getting very popular all over the world for various applications such as in auto body making, machine parts manufacturing, steel structure buildings, concrete reinforcement, etc. In Bangladesh, use of high strength TMT steels bars has got a momentum in the construction of flyovers, bridges and high rise buildings because of its good combination of the required mechanical properties. In this research work, locally produced high strength TMT reinforcing steel bars (20 mm dia.) of two different companies have been investigated. As a part of this research work, at first, details microstructural morphologies of hardened case, transition zone and core of both steels were investigated by optical microscope and they were then photographed. After that, Rockwell hardness was measured on different zones. Tensile tests were also carried by a Universal Testing Machine at room temperature. After tensile tests, details of the fracture modes of the steel bars were studied carefully. The fracture modes were then discussed in terms of chemical compositions and carbon equivalents, resulted microstructures, case and core hardness, depths of hardened case and transition zone of the steel bars.

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“…It has been found that steel bars with higher residual stress will corrode at a higher rate [20,21]. In Bangladesh, both the atmospheric temperature and humidity are high.…”

Section: Resultsmentioning

confidence: 99%

Hardened Case Properties and Tensile Behaviours of TMT Steel Bars

Kabir¹,

Islam²

2014

AJME

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“…The corrosion potential provides qualitative observations and probably points out the corrosion of steel embedded in concrete to a large extent. On the other hand, reliable quantitative data on the corrosion of steel embedded in concrete can be obtained by measuring the steel's resistance or current density [2,24].…”

Section: Results Of Corrosion Testsmentioning

confidence: 99%

“…Changes in corrosion potentials versus time were indicated in graphs in order to determine whether the steel was active or passive. Recommendations on evaluation of potential measurement results in ASTM C876 experiment method are stated in Table 5 [2,[24][25][26].…”

Section: Corrosion Testsmentioning

confidence: 99%

“…In addition to the economic losses incurred, public safety is also jeopardized, even culminating in loss of lives due to incidents like collapsing of bridges and structures [2]. Methods of corrosion control for reinforcing steel include cathodic protection [3,4], surface treatments of the rebars (e.g., epoxy coating) [3], usage of a surface coating on the concrete [4] and the usage of mineral admixtures (e.g., silica fume) [2] in the concrete. Utilization of mineral admixtures is a particularly appealing alternative due to its simplicity and relatively low cost [3].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion behavior of reinforcing steel embedded in concrete produced with finely ground pumice and silica fume

Keleştemur

Demirel

2010

Construction and Building Materials

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In this study, the mechanical and physical properties of concrete specimens obtained by substituting cement with finely ground pumice (FGP) at proportions of 5%, 10%, 15% and 20% by weight has been investigated, in addition to analyzing the corrosion behavior of reinforcing steels embedded in these specimens. Besides, with the purpose of determining the effect of silica fume (SF) additive over the corrosion of reinforcing steels embedded in concrete with FGP, SF has been entrained to all series with the exception of the control specimen, such that it would replace with cement 10% by weight. Corrosion experiments were conducted in two stages. In the first stage, the corrosion potential of reinforcing steels embedded in the concrete specimens was measured every day for a period of 160 days based on the ASTM C 876 standard. In the second stage, the anodic and cathodic polarization values of the steels were obtained and subsequently the corrosion currents were determined with the aid of cathodic polarization curves. In the study, it was observed that a decrease in the mechanical strength of the specimens and an increase in the corrosion rate of the reinforcing steel had taken place as a result of the FGP addition. However, it was determined that with the addition of SF into concretes supplemented with FGP, the corrosion rate of the reinforcing steel has significantly decreased.

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“…Where CR is average corrosion rate (mm/year), K is constant (8.76 x 10 4 ), W is weight lost by the specimen during the test (g), A is = total surface area of the test specimen (cm 2 ), T is duration of exposure (h) and D is density of the specimen material (g/cm 3 ).…”

Section: Methodsmentioning

confidence: 99%