In this paper, ultrasonic velocity(UV) test through OPC and Slag concrete is conducted considering porosity under compressive and tensile loading conditions. The test results show that up to 50% of compressive loading condition, UV a little increases and remarkably drops at peak load, however it fluctuates under the tensile loading condition because of the number of increase micro cracks in concrete specimens.

• 김윤용(충남대학교 토목공학과) | Kim, Yun-Yong
• 방진욱(충남대학교 토목공학과) | Bang, Jin-Wook
• 김성준(한남대학교 건설시스템공학과) | Kim, Seong-Jun
• 박기태(한국건설기술연구원) | Park, Ki-Tae
• 권성준(한남대학교 건설시스템공학과) | Kwon, Seung-Jun 교신저자