Effects of moisture and chloride content on critical contour area in synthetic aperture radar images

Tzuyang Yu; Ahmed Alzeyadi

doi:10.1117/12.3011162

10 May 2024 Effects of moisture and chloride content on critical contour area in synthetic aperture radar images

Tzuyang Yu, Ahmed Alzeyadi

Proceedings Volume PC12950, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVIII; PC129500B (2024) https://doi.org/10.1117/12.3011162
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States

Abstract

Synthetic aperture radar (SAR) imaging is one of the radar NDE techniques used for remote sensing of civil infrastructures. SAR imaging has been used for remote detection of moisture content, chloride content, and steel rebar corrosion in concrete specimens. Parameters extracted from SAR images are used for condition assessment, including integrated SAR amplitude (Iint), average maximum SAR amplitude (Iavg), and critical contour area (Ac). The objective of this paper is to investigate the effects of moisture and chloride content on the interdependency of critical contour area with integrated SAR amplitude and average maximum SAR amplitude. Laboratory portland cement concrete panel specimens of different water-to-cement (w/c) ratios (0.4, 0.5, and 0.55) were manufactured and scanned inside an electromagnetic anechoic chamber during the drying process of the specimens. From our result, it was found that the interdependency of critical contour area with integrated SAR amplitude and average maximum SAR amplitude during moisture variation is different from the one during chloride variation for different w/c ratios.

Conference Presentation

Citation Download Citation

Tzuyang Yu and Ahmed Alzeyadi "Effects of moisture and chloride content on critical contour area in synthetic aperture radar images", Proc. SPIE PC12950, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVIII, PC129500B (10 May 2024); https://doi.org/10.1117/12.3011162

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