There are great and comprehensive efforts to reduce green house gases, especially carbon dioxide, in a global community of nations. Carbon dioxide emissions of South Korea placed ninth in the world in 2007, 13 percent of that is a field of construction materials. Domestic portland cement(OPC) is made up of clinker, gypsum and 5% of admixtures. If 5% of Admixture contents of portland cement add to 10%, CO2 reduction effect can be expected. In this study, the strength properties of mortar using two types of cement were evaluated.

• 현정환(충남대학교, 토목공학과, 박사과정) | Hyun, Jung Hwan
• 이병재(충남대학교 토목공학과, 공학박사) | Lee, Byung Jae
• 방진욱(충남대학교, 토목공학과, 박사과정) | Bang, Jin Wook
• 서지석(충남대학교 토목공학과, 석사과정) | Seo, Ji Seok
• 김윤용(충남대학교 토목공학과 교수, 공학박사) | Kim, Yun Yo Corresponding Author