Developing a Multi-Element Sensor to Non-Destructively Monitor Several Fundamental Parameters Related to Concrete Durability

Jin, Ming; Ma, Yuefeng; Zeng, Haoyu; Liu, Jiaping; Jiang, Linhua; Yang, Guo Liang; Gu, Yue

doi:10.3390/s20195607

Cited by 9 publications

(5 citation statements)

References 64 publications

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“…[37,38]; In-service concrete structures need to be evaluated by inspection of their different structural elements to determine their durability [39][40][41][42][43]. Methodologies have been developed in different countries to estimate the health of structure through inspection [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58].…”

Section: Size Effect Of Impact-echo Methodsmentioning

confidence: 99%

Detection of Frost-Resistance Property of Large-Size Concrete Based on Impact-Echo Method

Qi¹,

Ren²,

Wang³

2023

Structural Durability &Amp; Health Monitoring

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The dynamic elasticity modulus (E d ) is the most commonly used indexes for nondestructive testing to represent the internal damage of hydraulic concrete. Samples with a specific size is required when the transverse resonance method was used to detect the E d , resulting in a limitation for field tests. The impact-echo method can make up defects of traditional detection methods for frost-resistance testing, such as the evaluation via the loss of mass or strength. The feasibility of the impact-echo method to obtain the relative E d is explored to detect the frost-resistance property of large-volume hydraulic concretes on site. Results show that the impact-echo method can replace the traditional resonance frequency method to evaluate the frost resistance of concrete, and has advantages of high accuracy, easy to operate, and not affecting by the aggregate size and size effect of samples. The dynamic elastic modulus of concrete detected by the impact-echo method has little difference with that obtained by the traditional resonance method. The one-dimensional elastic wave velocity of concrete has a good linear correlation with the transverse resonance frequency. The freeze-thaw damage occurred from the surface to the inner layer, and the surface is expected to be the most vulnerable part for the freeze-thaw damage. It is expected to monitor and track the degradation of the frost resistance of an actual structure by frequently detecting the P-wave velocity on site, which avoids coring again.

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Section: Size Effect Of Impact-echo Methodsmentioning

confidence: 99%

Detection of Frost-Resistance Property of Large-Size Concrete Based on Impact-Echo Method

Qi¹,

Ren²,

Wang³

2023

Structural Durability &Amp; Health Monitoring

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“…The results show that the changing trend of the resistivity curve can be used to evaluate the strength of cement and distinguish the quality of cement, and establish a new general relationship between gel space ratio and resistivity. Jin [48] proposed to embed multi-element sensors in concrete, through resistivity probes and multiple chloride ion selective electrodes, the internal resistivity, free Cl-content of concrete pore solution at different depths and steel corrosion parameters can be monitored non-destructively in real time. It provides key durability parameters for finely assessing concrete health and predicting concrete service life.…”

Section: Monitoring Concrete Performance Based Onmentioning

confidence: 99%

Research Progress of concrete Vibratory Technology

Li¹,

Wu²,

Zhang³

et al. 2022

AJST

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Traditional vibrating equipment and technology combined with manual experience to judge the quality of concrete vibrating is highly subjective and poorly standardized. Due to under-vibration, over-vibration and leakage vibration, the concrete has defects such as holes, segregation and cracks, which lead to the pouring quality not meeting the design requirements. The research progress of vibrating technology is introduced from four aspects: parameters affecting vibrating quality, evaluation method of vibrating quality, key technologies and development trends of vibrating. The research shows that intelligent vibrating has a significant role in promoting the development of civil engineering construction, and also lays a good foundation for the development of related engineering equipment and vibrating machinery automation.

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“…The technique comprises several steps which include: i) the drilling of a core, ii) cutting it up into lengths, iii) crushing, and finally iv) carrying out a chemical test. Even if this assessment relies on a complex method, there is no commercial sensor with proved implementation and efficiency on site (Torres-Luque et al, 2014;Jin et al, 2020;Biondi et al, 2021;Watanabe et al, 2021). Additionally, other methods such as resistivity also demonstrate limitations in terms of error and require correction of the data (e.g., due to the effect of saturation degree and temperature) (Lecieux et al, 2015;Bonnet & Balayssac, 2018;Bourreau et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Uncertainty quantification of semi-destructive testing for chloride content assessment for a concrete bridge in maritime environment

Schoefs

Raissa

Bonnet

et al. 2023

Front. Built Environ.

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Reinforced concrete (RC) structures in harbors are designed for long life (50–70 years) and are subjected to chloride-induced corrosion. Diagnosis of these structures usually relies on inspections which consist of ponding salt in the concrete cover with semi-destructive testing (SDT). Uncertainties in inspection result in bad diagnosis, and consequently in bad decisions. This study aims at developing a methodology for quantifying the uncertainty of measurements taken on-site where the random properties of concrete play a role. This assessment was performed through multiple measurements by three operators from two laboratories on the same cores extracted from a 27-year-old existing bridge located in Ireland. A total of 566 measurements are available. The effect of the operator, laboratory, and protocols are highlighted and then modeled. It is shown that the error of assessment is a function of the chloride content and follows a student distribution. The standard deviation of this error reached approximately 15% of the chloride content. This error is further propagated through the Fick law parameters for measuring its effect on the diagnosis: a 17% change of the probability of corrosion initiation is shown. This is the first study of this type with in situ inspections and the work is partly transferable to other coastal or offshore structures.

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Developing a Multi-Element Sensor to Non-Destructively Monitor Several Fundamental Parameters Related to Concrete Durability

Cited by 9 publications

References 64 publications

Detection of Frost-Resistance Property of Large-Size Concrete Based on Impact-Echo Method

Detection of Frost-Resistance Property of Large-Size Concrete Based on Impact-Echo Method

Research Progress of concrete Vibratory Technology

Uncertainty quantification of semi-destructive testing for chloride content assessment for a concrete bridge in maritime environment

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