This study is the study of the chlorine ion penetration resistance of the study of the natural durability enhancement materials that can reduce cracking of the concrete. The durability enhancement materials of natural were substituted 10%, 20%, 30% of cement, the results were confirmed excellent chlorine ion penetration resistance as the more increasing the natural durability enhancement.

• 김성수(대진대학교 건설시스템공학과, 교수) | Kim, Seong Soo
• 이정배(대진대학교 건설시스템공학과, 겸임교수) | Lee, Jeong Bae
• 박승호(대진대학교 토목환경공학과, 박사과정) | Park, Seung Ho
• 이진용(대진대학교 토목공학과, 석사과정) | Lee, Jin Yong
• 김해(대진대학교 토목공학과, 석사과정) | Kim, Hae