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http://dx.doi.org/10.5392/JKCA.2015.15.03.415

Modeling on Ultrasonic Velocity in Concrete Considering Micro Pore Structure and Loading Conditions  

Kim, Yun Yong (충남대학교 토목공학과)
Oh, Kwang-Chin (한국시설안전공단)
Park, Ki-Tae (한국건설기술연구원)
Kwon, Seung-Jun (한남대학교 건설시스템공학과)
Publication Information
The Journal of the Korea Contents Association / v.15, no.3, 2015 , pp. 415-426 More about this Journal
Abstract
For a long time, evaluation of soundness and strength in concrete has been performed through ultrasonic velocity(UV), which is essential work in field assessment. Porosity in concrete is a major parameter indicating durability and strength, and UV passing concrete depends on porosity variation. In this paper, a modeling on UV through concrete is carried out considering porosity and the results are verified with those from test. Additionally UV in concrete under compression/tension loading condition is measured and UV modeling with loading condition is performed. Up to 50% of loading ratio, UV slightly increases and greatly drops at peak load in compression region, however it fluctuates in tensile region due to micro cracking in matrix. The proposed model shows a reasonable agreement with test results in control and compression region, and needs modification for tensile region considering micro cracks and local aggregate interlocking.
Keywords
Ultrasonic Velocity; Durability; Porosity; Modeling; Tensile Stress; Compressive Stress;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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