Frequency Analysis for EIS Measurements in Autoclaved Aerated Concrete Constructions

Rubene, Sanita; Vilnītis, Mārtiņš; Noviks, Juris

doi:10.1016/j.proeng.2015.06.194

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Other than the literature associated with system identification, the approach described in this paper has a role to play in all fields where impedance is used. Impedance being a fundamental characteristic of the system, has been used in various applications [24,23,14]; however, many of these studies were limited to higher frequencies (> 1Hz) as the time required for impedance generation at low frequencies is usually unacceptably large. Since the impedance information from chirp analysis is obtained in a much shorter time (even at low frequencies), chirp analysis has the potential to become the technique of choice for EIS in all of these applications.…”

Section: Discussionmentioning

confidence: 99%

“…is essentially FRA of systems with the input and output being current and voltage respectively. EIS has been used for diagnostics in various electrochemical systems finding applications in disparate problem domains such as corrosion studies [22,23], sensors [18], biological systems [9,14], concrete characterization [2,24], body fat estimation [12], and many others. Impedance as a diagnostic measure cross-cuts almost all engineering and science disciplines.…”

Section: Relevance To Electrochemical Impedance Spectroscopymentioning

confidence: 99%

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Time-frequency equivalence using chirp signals for frequency response analysis

Suresh

Rengaswamy

2021

Preprint

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Frequency response analysis (FRA) of systems is a well-researched area. For years, FRA has been performed using input signals, which are a series of sinusoids or a sum of sinusoids. This results in large experimentation time, particularly when the system has to be probed at lower frequencies. In this work, we describe a previously unknown time-frequency duality for linear systems when probed through chirp signals. We show that the entire frequency response can be extracted with a single chirp signal by extending the notion of instantaneous frequency to both the input and output signals. It is surprising that this powerful result had not been uncovered given that FRA has been used in multiple disciplines for more than hundred years. This result has the possibility of completely revolutionizing methods used for frequency response analysis. Simulation studies that support the main result are described. While this result is of relevance in multiple areas, we demonstrate the potential impact of this result in electrochemical impedance spectroscopy.

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Section: Discussionmentioning

confidence: 99%

Section: Relevance To Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Time-frequency equivalence using chirp signals for frequency response analysis

Suresh

Rengaswamy

2021

Preprint

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“…The issues of the influence of low negative and alternating temperatures on the strength and deformation properties of concrete are considered by numerous authors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. The increase in frost resistance of reinforced concrete structures is ensured primarily by the use of frost-resistant concretes.…”

Section: Introductionmentioning

confidence: 99%

Effect of reinforcement on the durability of bent reinforced concrete structures under conditions of alternating freezing and thawing

Попов

2023

E3S Web Conf.

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The article studies the influence of the level and type of reinforcement of bending elements of reinforced concrete structures on their bearing capacity under the influence of alternating freezing and thawing. Strength and deformation characteristics for B30 concrete class were taken according to Construction Rules SP 63.13330.2018, and after exposure to alternating freezing and thawing according to Construction Rules SP 52.105.2009. The study of the stress-strain state and the assessment of the bearing capacity were carried out according to a specially developed program, in which the diagrammatic method was implemented. It is shown that the durability of bent reinforced concrete structures depends on the percentage and type of reinforcement. When reinforcing with longitudinal tensile reinforcement equal to 1%, the decrease in the bearing capacity of a reinforced concrete beam after exposure to alternating freezing and thawing will make up 5.5%, and in case of 2.5% reinforcement it will equal to 20.9%. In addition, the nature of fracture will change and the stress in the tensile reinforcement will not reach the design resistance. If it is impossible to limit the percentage of reinforcement of longitudinal tensile reinforcement, it is recommended to use double reinforcement. Installation of working reinforcement in a compressed zone in a volume of 50% of the stretched one with a reinforcement percentage of 2% will reduce the decrease in bearing capacity to 2.2% after exposure to freezing and thawing cycles and not change the nature of destruction.

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