Browse > Article
http://dx.doi.org/10.5345/JKIC.2010.10.1.147

A Study on the Chloride Diffusivity of Recycled Aggregate Concrete  

Bae, Jong-Min (부산대학교 건축공학과)
Kim, Young-Su (부산대학교 건축학부)
Publication Information
Journal of the Korea Institute of Building Construction / v.10, no.1, 2010 , pp. 147-153 More about this Journal
Abstract
The recycling of demolished concrete as an alternative source of coarse aggregates for the production of new concrete can help to solve the growing waste disposal crisis and the problem of the depletion of natural aggregates. The purpose of this study is to investigate the chloride migration of recycled aggregate concrete containing pozzolanic materials by the chloride migration coefficient. The specimens were made with recycled coarse aggregate at various replacement ratios (10, 30, 50%) and metakaolin, blast furnace slag, and fly ash is replaced for recycled concrete with a mixing ratio of 20%. The major results are as follows. 1) The compressive strength of recycled aggregate concrete containing pozzolanic materials increases as the curing age and chloride diffusivity decreases. 2) When the replacement ratio of recycled coarse aggregate is 30%, the chloride migration coefficient of recycled concrete containing blast furnace slag or metakaolin that shows a value similar to or lower than that of plain concrete at all ages.
Keywords
recycled coarse aggregate; chloride diffusivity; durability; replacement ratio;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 박영신 외 3인, 재생골재를 사용한 콘크리트의 특성에 관한 연구, 대한건축학회 논문집, 제23권 제1호, pp.239-242, 2003.4
2 유재강, 시멘트 종류 및 혼화재 치환에 따른 해양콘크리트의 내염성능향상 효과,레미콘, 제85호, pp.22-33, 2005
3 유재강, 혼화재의 종류 및 치환율이 염수에 침지한 콘크리트의 내염성능 향상에 미치는 영향에 관한 연구, 대우건설 기술연구소, pp.71-76, 2004
4 이세현 외 1인,고강도 영역의 재생골재 콘크리트의 물리적 특성. 한국콘크리트학회 논문집, 제16권 제6호, pp.575-583, 2001.12
5 정헌수 외 2인, 순환골재 품질과 치환율이 콘크리트 역 학적 특성에 미치는 영향, 대한건축학회 논문집 제22권 제6호, pp.71-78, 2006. 6
6 지상규 외 5인, 순환골재 치환율에 따른 콘크리트의 역학적 특성, 대한건축학회 학술발표대회 논문집, 제27권 제1호, pp.607-612, 2007.10
7 최수일 외 15인, 폐콘크리트의 재활용기술 개발방안에 관한 연구, 한국건설기술연구원, 1996
8 최희복 외 4인, 순환골재 콘크리트의 공학적 특성 및 내구성, 대한건축학회 논문집 제23권 제9호, pp.125-132, 2007.9
9 Nevile. A.M, Properties of Concrete, Longman, 1995.
10 NT BUILD 492, Concrete, Mortar and Cement-Based Repair Materials : Chloride Migration Coefficient from Non-Steady-State Migration Experiments, Nordtest, 1999
11 P.K. Mehta, P.J.M. Monteiro, Concrete-Structure, Properties, and Materials, Prentice Hall, 1993
12 Sagoe-Crentsil, Performance of concrete made with commercially produced recycled coarse aggregate Cement & Concrete Research Vol 31, pp.707-712, 2001   DOI   ScienceOn