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http://dx.doi.org/10.11112/jksmi.2014.18.2.099

Effect of Steam Curing on the Properties of Recycled Aggregate Concrete  

Lee, Seung-Tae (군산대학교 토목공학과)
Choi, Jin-Yeop (군산대학교 토목공학과)
Park, Ki-Tae (한국건설기술연구원 인프라구조연구실)
Seo, Dong-Woo (한국건설기술연구원 인프라구조연구실)
You, Young-Jun (한국건설기술연구원 인프라구조연구실)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.18, no.2, 2014 , pp. 99-107 More about this Journal
Abstract
In this study, the effects of curing procedures on the mechanical properties of recycled aggregate concrete (RAC) were investigated. The replacement ratios by recycled coarse aggregate were 0, 25, 50, 75 and 100% by mass of natural coarse aggregate. Steam curing was adopted to all recycled aggregate concrete mixtures. Compressive and split tensile strength, water porosity, chloride ions penetration resistance and drying shrinkage measurements were carried out to determine performance of the RACs. From the test results, it was found that the mechanical performance of RAC decreased as the recycled aggregate contents increased. Furthermore, steam curing reduced the compressive and split tensile strength, water porosity and total charge of RAC, especially at the early ages. However, at the later ages, the beneficial effect of steam curing was less prominent. This study clearly showed that initial steam curing could be one of practical methods to improve performance of RAC with higher replacement ratio of recycled aggregate.
Keywords
Chloride ions penetration resistance; Drying shrinkage; Mechanical properties; Recycled aggregate concrete; Steam curing; Water porosity;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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