Using modified core drilling method to estimate the damage of fire exposed concrete

Tian, Likang; Shang, Xingyan; Yu, Jiangtao

doi:10.1016/j.proeng.2017.11.041

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…Existing concrete internal defect detection methods are divided into invasive tests such as the probe method [13] and core drilling method [14], and nondestructive testing methods. Researchers prefer the nondestructive test rather than the invasive test since the latter damages the materials and structures.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic computed tomography-based internal-defect detection and location of underwater concrete piers

Sun,

Hou,

Fan

et al. 2023

Smart Mater. Struct.

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Concrete piers are the key load-bearing components of wading bridges. Most detection equipment and methods focus on the surface defects of underwater piers, whereas the detection methods of internal defects are very deficient. This study proposes an ultrasonic computed tomography method combining Linear Travel time Interpolation and Simultaneous Iterative Reconstruction Techniques for detecting internal defects in underwater concrete piers. The two-dimensional Median Filtering and Self-Organizing Feature Map are utilized to post-process tomographic images and the confidence approach is employed to detect defects. The efficacy of the proposed method is validated through numerical simulation and underwater experiments, respectively. The COMSOL is utilized to simulate the two-dimensional random aggregate model of the concrete and internal defects are added to validate the method's effectiveness from a mesoscopic perspective. Then actual scale piers containing embedded defects are cast and detected. The results demonstrate that the method can identify and locate internal defects in numerical simulations and practical tests. The numerical simulation experiments results are superior to those of scale concrete specimens. In addition, underwater concrete piers with larger internal defects, square holes, and no steel reinforcements tend to have better detection results.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic computed tomography-based internal-defect detection and location of underwater concrete piers

Sun,

Hou,

Fan

et al. 2023

Smart Mater. Struct.

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show abstract

“…By measuring the elapsed time, the total travel time from the transmit antenna to the receive antenna through the internal media can be calculated and various related parameters, such as the depth of the dielectric layer and the internal structure of the detected object, can be deduced based on the travel time, amplitude, frequency, and waveform variation attributes. 7,8 The transmit and receive antennas are key components in a GPR system. Existing GPR detection technology primarily evaluates building structures using an air-launched antenna.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, a critical topic in the current study is to investigate the effect of the detection distance on the accuracy of the lining contour detection. At present, the transient surface wave method, 5 ultrasonic method, 6 and core drilling method 7 are used to detect lining. But these three methods have different degrees of malpractice, and it is difficult to truly reflect the quality of tunnel construction.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of a ground-coupled antenna based non-contact method for detecting the integrity of lining contours

Cao

Yang

Wang

et al. 2018

International Journal of Distributed Sensor Networks

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Accurate detection of the lining contours is important for the evaluation of working condition and service life of the underground structures. A 1:1 test model was constructed to elucidate the accuracy of the non-contact detection of the lining profile with a ground-coupled antenna. In addition, the accuracy at various detection distances was qualitatively and quantitatively analyzed. At detection distances below 80 mm, it was found that a radar scanning map with welldefined lining contours could be obtained when gain processing techniques were applied to the measurement signal. As the detection distance is above 160 mm, the measured signal must be processed with horizontal background removal and vertical filter gain processing. In addition, when the detected values with large errors were corrected using the functional relationship between the contact and non-contact detection values, this effectively improved the detection accuracy to 92.05% at a detection distance of 160 mm. Based on the results of this study, the detection precision and noncontact detection distance were sufficient to satisfy the requirements for typical engineering applications. Considering the high accuracy and easy operability, the non-contact coupled antenna detection method is likely to be the best option to evaluate the lining contours in underground engineering.

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Codes applicability of estimating the FRC compressive strength by the core-drilling method

Taman

Elaty

Behiry

2022

Construction and Building Materials

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Using modified core drilling method to estimate the damage of fire exposed concrete

Cited by 3 publications

References 14 publications

Ultrasonic computed tomography-based internal-defect detection and location of underwater concrete piers

Ultrasonic computed tomography-based internal-defect detection and location of underwater concrete piers

Accuracy of a ground-coupled antenna based non-contact method for detecting the integrity of lining contours

Codes applicability of estimating the FRC compressive strength by the core-drilling method

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