期刊
JOURNAL OF APPLIED REMOTE SENSING
卷 14, 期 2, 页码 -出版社
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.JRS.14.024520
关键词
moisture content; water-to-cement ratio; concrete; imaging radar; remote synthetic aperture radar; air-drying
资金
- U.S. Department of Transportation
- U.S. Department of Transportation's University Transportation Centers Program
In civil engineering, determining the subsurface moisture content and the water-tocement (w/c) ratio of concrete structures in the field is a challenging task. Moisture content of concrete structures regards the cement hydration level and short-term strength development of concrete, as well as the phase-distribution (solid, gaseous, and liquid) inside concrete and its long-term durability. We describe a microwave nondestructive evaluation technique using noncontact/nonintrusive synthetic aperture radar (SAR) imaging to estimate both the w/c ratio and subsurface moisture content of concrete panels. Concrete panels made of three w/c ratios (0.4, 0.5, and 0.55) were air dried for similar to 3 months and scanned by a laboratory 10-GHz SAR imaging system. From this research, we found that SAR imaging can capture the moisture content variation and its spatial distribution. A parameter of SAR images, the critical contour area, is identified and proposed for estimating subsurface moisture content and the w/c ratio of concrete panels. At a given w/c ratio, the critical contour area increases with the increase of moisture content. At a given moisture content, the critical contour area decreases with the increase of the w/c ratio. (C) 2020 Society of Photo-Optical Instrumentation Engineers (SPIE)
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据