Corrosion resistance of steel bars in mortar mixtures mixed with organic matter, microbial or other

Kawaai, Keiyu; Nishida, Takahiro; Saitô, Akio; Ujike, Isao; Fujioka, S.

doi:10.1016/j.cemconres.2019.105822

Cited by 10 publications

(4 citation statements)

References 7 publications

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“…For a variety of different bacterial additives, e.g., bacterial cell walls, [ 184 ] and bacterial solutions, [ 185,186 ] such an improvement of the mechanical competence of the final, cured material has been reported. [ 187–189 ] Moreover, bacterial additives can enhance the corrosion resistance of load‐bearing steel elements in reinforced concrete [ 190–192 ] —and this increases the durability and thus lifetime of objects making use of this class of building materials, e.g., bridge pillars, walls in high rise buildings, and tunnel constructions.…”

Section: Applications Of Natural and Modified Biofilms In Different Fieldsmentioning

confidence: 99%

Bacterial Materials: Applications of Natural and Modified Biofilms

Hayta

Ertelt

Kretschmer

et al. 2021

Adv Materials Inter

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Over millennia, bacteria have developed clever strategies to build biopolymer‐based communities in which they can survive even extremely challenging conditions. Such bacterial biofilms come with a broad range of fascinating material properties that—in settings such as medicine, food production, or other areas of industry—make it difficult to remove or inactivate them: they can stick to many surfaces, repel water and oils, and can even transport electrons. Inspired by the outstanding versatility and sturdiness of such bacterial biofilms, material scientists have set out to harness those properties and to create bacterial materials for different applications. However, as the range of technological applications employing biofilms keeps expanding, improved material properties or broader functionalities are desired. Here, such attempts where materials with improved properties were created by making use of either natural or modified bacterial biofilms are reviewed. The areas in which those bacterial materials may be used range from agriculture and (environmental) biotechnology over biomedical and electrical engineering to construction engineering.

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Section: Applications Of Natural and Modified Biofilms In Different Fieldsmentioning

confidence: 99%

Bacterial Materials: Applications of Natural and Modified Biofilms

Hayta

Ertelt

Kretschmer

et al. 2021

Adv Materials Inter

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“…On Marić et al (2019), authors present some study cases of bridges and how the use of non-destructive techniques in routinary inspections can lead to more accuracy in find steel corrosion and their level inside structures. The most used technique is the Half-cell potential (HCP) (Poursaee, 2016), which is used to detect corrosion resistance of steel bars using a single contact point in the bar (electrode), and a second electrode on the concrete surface (Kawaai et al, 2019). Another common technique is linear-polarization-resistance (LPT).…”

Section: Typical Techniques Of Measurementmentioning

confidence: 99%

Portable Measurement Systems Based on Microcontrollers to Test Durability of Structures: Mini-Review

Segura

Osma

2020

Front. Built Environ.

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Corrosion presence is a recurrent concern in buildings and structures that use steel as their core or as reinforcement, due to the change of steel's properties caused by this phenomena. Therefore, methods to detect and quantify corrosion had been developed; some are based on electrical and electrochemical measurements. On reinforced concrete structures, sometimes there are exposed steel bars which are visible, but on those, a visual inspection could determine corrosion presence. There exist different options to measure the steel bars' corrosion and its level. The more straight forward consists of cutting through the concrete until the bar is exposed and connecting a measurement device there. A disadvantage of this technique is that steel has to be exposed to the environment during the measurement; as an alternative, novel contact-less electrochemical techniques are getting more popular. Recent advances in low-cost and portable electrochemical devices and embedded sensors can change how the structures are tested. Moreover, there is a discussion about how those devices, if developed for other fields as biosensors, can assist in other areas. This mini-review also gives some hints of what the future trends could be due to the combination of those areas.

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“…The corrosion initiation phase is broadly investigated in laboratory experiments. The authors [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ] present experimental results, although each study refers to a different aspect of the initiation phase. In [ 6 ], the diffusivity of concrete with different admixtures is investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The research presented in [ 9 ] focuses on the possibility of testing the chloride inflow by using an NaCl solution instead of seawater when assessing the performance of structures in marine conditions. The results of the accelerated NaCl test of corrosion in a specimen made using mortar mixed with aerobic microorganisms are presented in [ 11 ]. The experiment shows that metabolic activities of microorganisms results in higher resistance against corrosion, especially effective in the case of cracked concrete.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Non-Uniformly Distributed Corrosion in Reinforced Concrete Cross-Section

German

Pamin

2021

Materials

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Reinforced concrete structures can be strongly damaged by chloride corrosion of reinforcement. Rust accumulated around rebars involves a volumetric expansion, causing cracking of the surrounding concrete. To simulate the corrosion progress, the initiation phase of the corrosion process is first examined, taking into account the phenomena of oxygen and chloride transport as well as the corrosion current flow. This makes it possible to estimate the mass of produced rust, whereby a corrosion level is defined. A combination of three numerical methods is used to solve the coupled problem. The example object of the research is a beam cross-section with four reinforcement bars. The proposed methodology allows one to predict evolving chloride concentration and time to reinforcement depassivation, depending on the reinforcement position and on the location of a point on the bar surface. Moreover, the dependence of the corrosion initiation time on the chloride diffusion coefficient, chloride threshold, and reinforcement cover thickness is examined.

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Corrosion resistance of steel bars in mortar mixtures mixed with organic matter, microbial or other

Cited by 10 publications

References 7 publications

Bacterial Materials: Applications of Natural and Modified Biofilms

Bacterial Materials: Applications of Natural and Modified Biofilms

Portable Measurement Systems Based on Microcontrollers to Test Durability of Structures: Mini-Review

Numerical Simulation of Non-Uniformly Distributed Corrosion in Reinforced Concrete Cross-Section

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