Theoretical considerations on the supposed linear relationship between concrete resistivity and corrosion rate of steel reinforcement

Gulikers, J.

doi:10.1002/maco.200403841

Cited by 97 publications

(52 citation statements)

References 7 publications

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“…A linear relationship between concrete electrical conductivity and corrosion rate has been found in several articles [104,106,[109][110][111]. Experimental study on carbonated mortars also confirmed this linear trend and showed a different slope in case of chloride presence as the corrosion rate was affected by Cl − /OH − ratio [110].…”

Section: Correlation Between Electrical Resistivity and Reinforcementsupporting

confidence: 56%

“…Due to microcell geometric arrangements of anodic and cathodic sites, concrete electrical resistivity plays an important role in controlling corrosion rates [111]. Similar to Glass et al 's study [103], it was stated by Gulikers [111] that overall corrosion cell resistance is not inherently controlled by concrete electrical resistivity, but rather cathodic activation controls mostly. It should always be considered that the interpretation of electrical resistivity measurements is a challenging task due to many variables affecting the results like moisture condition, salt content, and so forth.…”

Section: Correlation Between Electrical Resistivity and Reinforcementmentioning

confidence: 83%

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Electrical Resistivity of Concrete for Durability Evaluation: A Review

Azarsa

Gupta

2017

Advances in Materials Science and Engineering

226

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Degradation processes in reinforced concrete structures that affect durability are partially controlled by transport of aggressive ions through the concrete microstructure. Ions are charged and the ability of concrete to hold out against transfer of ions greatly relies on its electrical resistivity. Hence, a connection could be expected between electrical resistivity of concrete and the deterioration processes such as increase in permeability and corrosion of embedded steel. Through this paper, an extensive literature review has been done to address relationship between concrete electrical resistivity and its certain durability characteristics. These durability characteristics include chloride diffusivity and corrosion of reinforcement as these have major influence on concrete degradation process. Overall, there exists an inverse or direct proportional correlation between these parameters. Evaluated results, from measuring the concrete electrical resistivity, can also be used as a great indicator to identify early age characteristics of fresh concrete and for evaluation of its properties, determination of moisture content, connectivity of the micropores, and even condition assessment of in-service structures. This paper also reviews and assesses research concerning the influential parameters such as environmental conditions and presence of steel rebar and cracks on measuring electrical resistivity of concrete. Moreover, concrete resistivity concept, application, and its various measurement techniques are introduced.

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Section: Correlation Between Electrical Resistivity and Reinforcementsupporting

confidence: 56%

Section: Correlation Between Electrical Resistivity and Reinforcementmentioning

confidence: 83%

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Azarsa

Gupta

2017

Advances in Materials Science and Engineering

226

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“…A característica não destrutiva do ensaio permite a sua contínua reprodução para monitoramento da qualidade do concreto, sem comprometer a integridade física da estrutura. Diversos estudos (Alonso et al, 1988;Andrade et al, 1996;Gulikers, 2005;Ghods et al, 2007) consideram a RES como um fator importante que afeta a velocidade ou taxa de corrosão das armaduras do concreto. A resistividade indica a habilidade do material em transportar cargas elétricas.…”

Section: Introductionunclassified

Investigação da resistência à compressão e da resistividade elétrica de concretos com diferentes tipos de cimento

Medeiros-Junior

Lima

Medeiros

et al. 2014

Revista de la Asociación Latinoamericana de Control de Calidad,

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RESUMONesse estudo foi possível observar a influência de quatro tipos de cimento brasileiros na resistência à compressão e na Resistividade Elétrica Superficial (RES) de amostras de concreto. Foram analisadas três relações água/cimento, o que resultou em doze distintas dosagens. Os resultados mostraram que os tipos de cimentos tem influência direta em ambos os ensaios. De maneira geral, quando comparado com uma série de referência, os cimentos com adição de escória de alto forno e pozolanas apresentaram redução na resistência à compressão do concreto, porém ganho na RES. O cimento com adição de pozolana é o que apresenta o maior ganho de resistência à compressão no tempo, embora tenha o menor valor absoluto. Os resultados também indicaram que a RES cresce com o tempo de ensaio e diminui com o aumento da relação a/c do concreto. Foi encontrada uma boa correlação entre os ensaios, com R² variando de 0,823 a 0,999. Palavras chaves: resistência à compressão; resistividade elétrica superficial; cimentos; escória de alto forno; pozolana. ABSTRACTThis work studied the influence of four Brazilian types of cement on the compressive strength and electrical resistivity in samples of concrete. Three water/binder ratios were analyzed, which led to the preparation of twelve different samples. The results show that the types of cement has a direct influence on both tests. In general, compared to a reference, the cements with additions of blast furnace slag and pozzolans reduced the strength, but increased the electrical resistivity. It was also observed that the cement with pozzolan showed the highest gain in strength with time, although it resulted in the lowest absolute value. The results also indicated that the electrical resistivity increases with time and decreases with higher water/binder ratios. A good correlation was found between the mentioned tests with R2 ranging from 0.823 to 0.999.

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“…Gulikers (2005) found a linear relationship between concrete resistivity and corrosion rate of steel reinforcement. The concrete (protected and nonprotected) was immersed in the chemical compounds for four continuous weeks and the effect of these compounds on the concrete was studied and it has been found that some of the samples become fragmented.…”

Section: Tensile Testmentioning

confidence: 95%

Effects of Different Environments on Reinforcement Concrete Corrosion

Awwad¹,

Ahmad²

2017

American Journal of Environmental Sciences

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This research focuses on various forms of steel bar corrosion located in different environments and the factors affecting the corrosion process, both the external (surrounding environment around concrete elements) and the internal environment (concrete itself), as well as on the investigations and tests for this type of damage, in order to develop measurements and recommendations that will reduce harmful investment as much as possible, by increasing the durability and resistance to aggressive environments throughout their life span.The results showed that the concentration (100%-75%) of sulfuric acid decreases more in steel bars diameter than in the second week, but the difference is negligible, and there is no change in the color of precipitation. Concentration (50%-25%) of sulfuric acid also showed decreases in bars diameter than in the second week, but the difference could be omitted, except for the concentration (50%) of sulfuric acid white layer appearance on the steel. In the fourth week, in NAOH, there has been no obvious change in the diameter of steel and an increase was noticed in the deposits substance as well as the appearance of external rust of Steel. HNO 3 with a 25% concentration continued a dramatic corrosion of steel and a large decrease in the diameter of steel was observed, which led to a change in the color of the liquid to brown, due to the fragmentation of steel, and the corrosion of the nonsoaked steel. When exposing the reinforcing bars for acid and base at different concentrations to investigate the ultimate tensile stress, a high decrease in the tensile strength of the steel bar was found, due to the concentration of nitric acid (25-50%) compared to the other acids and base, and this decrease is caused by a high degree of corrosion.

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Theoretical considerations on the supposed linear relationship between concrete resistivity and corrosion rate of steel reinforcement

Cited by 97 publications

References 7 publications

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Investigação da resistência à compressão e da resistividade elétrica de concretos com diferentes tipos de cimento

Effects of Different Environments on Reinforcement Concrete Corrosion

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