Inspection of reinforced concrete samples by Compton backscattering technique

Boldo, Emerson Mario; Appoloni, Carlos Roberto

doi:10.1016/j.radphyschem.2012.12.013

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…The results showed that reinforcement with a diameter of >2 mm within 10 cm of the wall can be detected. In 2014, Boldo and Appoloni [18] used a 100 mCi Am-241 radiation source and a CdTe detector to conduct nondestructive testing on the hidden corrosion inside the reinforcement. The results showed that steel inclusions and defects with a radius of 4 mm within 2 cm from the sample surface could be detected.…”

Section: Introductionmentioning

confidence: 99%

Study of a Compton backscattering wall defects detection device using the Monte Carlo method

Qin

Yang

et al. 2023

Nukleonika

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In view of the shortcomings of traditional wall defect detection methods, such as small detection range, poor accuracy, non-portable device, and so on, a wall defects detection device based on Compton backscattering technology is designed by Monte Carlo method, which is mainly used to detect the size and location information of defects in concrete walls. It mainly consists of two parts, the source container and the detection system: first, through the simulation and analysis of the parameters such as the receiving angle of the backscattered particles and the rear collimating material of the detector, the influence of the fluorescent X-ray peak of the detector collimating material on the backscattered particle counts is eliminated and the detected error is reduced; second, the ring array detector design, compared with single array detector and surface array detector, can facilitate real-time detection of defect orientation, expanding the single scan range and improving the detection efficiency. After simulation and comparative analysis, the relevant optimal parameters are obtained: the object is detected using a Cs-137 γ-ray source with an activity of 6 mCi, and a ring detector consisting of four 0.5-inch cube-shaped CsI scintillator detectors is placed at 150° to receive the backscattered photons. The simulation analysis using the Monte Carlo FLUKA program showed that the maximum depth of wall defect detection is 8 cm, the maximum error fluctuation range of defect depth and thickness is ±1 cm, the overall device weight is <20 kg, and the measurement time is <5 min.

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Section: Introductionmentioning

confidence: 99%

Study of a Compton backscattering wall defects detection device using the Monte Carlo method

Qin

Yang

et al. 2023

Nukleonika

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“…X-ray Compton scattering is one of the most promising probes for non-destructive imaging of the internal structure and material behavior of objects as it employs high-energy X-rays greater than 100 keV (Guzzardi & Licitra, 1988;Harding & Harding, 2010;Margret et al, 2015;Boldo & Appoloni, 2014). Compton scattering imaging (CSI) at a back-scattering geometry is known as back scattered imaging, and is used in the baggage screening systems at airports.…”

Section: Introductionmentioning

confidence: 99%

Direct cross-sectional imaging using X-ray Compton scattering: application to commercial batteries

Tsuji

Kajiwara

Itou

et al. 2021

J Synchrotron Radiat

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A synchrotron-based technique using Compton scattering imaging is presented. This technique has been applied to a coin battery (CR2023), and the cross-sectional image has been obtained in 34 ms without sample rotation. A three-dimensional image of the whole structure has been reconstructed from 74 cross-sectional images taken consecutively by scanning the incident, wide X-ray beam along one direction. This work demonstrates that quick cross-sectional imaging of regions of interest and three-dimensional image reconstruction without sample rotation are feasible using Compton scattering imaging.

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“…An HPGe detector and 137 Cs gamma ray source has been used for Portland concrete inspection using MCNP by Priyada, et al [19]; the same kind of gamma source and detector type were used to detect steel embedded in concrete by Margret, et al [20]; and using PENELOPE-2008, gamma-ray exposure in steel and a concrete-lined chamber was calculated by Mer,k et al [21]. Inspection of reinforced concrete using Compton backscattering has been performed using CdTe semiconductor detectors and 241 Am gamma sources by Boldo, et al [22].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique

Sari

Wirawan

Waris

et al. 2019

J. Eng. Technol. Sci.

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A simple void detection system for concrete was successfully developed using high-penetration gamma rays with Compton scattering. This research attempted to identify a void in the subsurface of a concrete volume that could not be accessed from any of the sides. Monte Carlo simulation using GEANT4 toolkit was performed to investigate the gamma-ray backscattering events. An NaI(Tl) detector was used with 60 Co and 137 Cs as gamma-ray sources. The void's location was successfully detected during material target scanning. Density discrepancies conduce variance of the backscattering peak produced due to the presence of a void. Compared to 60 Co as the gamma-ray source, 137 Cs is a better choice for application in NDT systems using Compton scattering.

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Inspection of reinforced concrete samples by Compton backscattering technique

Cited by 10 publications

References 2 publications

Study of a Compton backscattering wall defects detection device using the Monte Carlo method

Study of a Compton backscattering wall defects detection device using the Monte Carlo method

Direct cross-sectional imaging using X-ray Compton scattering: application to commercial batteries

Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique

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