|
Title |
Effect of Steam Curing on the Properties of Recycled Aggregate Concrete
|
|
Authors |
이승태 ; 최진엽 ; 박기태 ; 서동우 ; 유영준 |
|
Keywords |
염소이온 침투저항성 ; 건조수축 ; 역학적 성능 ; 순환골재 콘크리트 ; 증기양생 ; 투수공극 Chloride ions penetration resistance ; Drying shrinkage ; Mechanical properties ; Recycled aggregate concrete ; Steam curing ; Water porosity |
|
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.
|