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Fundamental Performance Evaluation of Recycled Aggregate Concrete with Varying Amount of Fly Ash and Recycled Fine Aggregate
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 Title & Authors
Fundamental Performance Evaluation of Recycled Aggregate Concrete with Varying Amount of Fly Ash and Recycled Fine Aggregate
Sim Jongsung; Park Cheolwoo; Moon Il-Whan; Lee Hee-Chul;
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 Abstract
This study investigates fundamental properties of recycled aggregate concrete which incorporated recycled coarse aggregate and various amount of recycled fine aggregate. In addition, for the purpose of the improvement of long term strength and durability, a part of cement was replaced with fly ash. Compressive strength and resistance to chloride ion penetration and carbonation were investigated. When the coarse aggregate was completely replaced with the recycled the replacement ratio of the fine aggregate with the recycled was recommended to be limited below in the consideration of strength. The strength of the steam-cured specimen was very comparable to the wet-cured at 28 days. As fly ash content increased the resistance to chloride ion penetration was increased. The chloride ion penetrability based on the charge passed was found to be low at 21 days and very low at 56 days, respectively. Carbonation depth and carbonation velocity coefficient increased as the fly ash content increased and the relationship between the carbonation depth and recycled fine aggregate replacement ratio was not clear. Up to 28days, however, the measured carbonation depth was mostly less than 10mm which could be considered as low
 Keywords
recycled aggregate;recycled aggregate concrete;compressive strength;chloride ion penetrability;carbonation;
 Language
Korean
 Cited by
1.
순환골재와 플라이애쉬가 콘크리트 유동성 및 강도에 미치는 영향,김규헌;신명수;공영식;차수원;

한국콘크리트학회논문집, 2013. vol.25. 2, pp.241-250 crossref(new window)
1.
Effect of Fly Ash on Rheology and Strength of Recycled Aggregate Concrete, Journal of the Korea Concrete Institute, 2013, 25, 2, 241  crossref(new windwow)
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