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Title |
Durability Evaluation of Precast Concrete Using Blast Furnace Slag and Fly Ash
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Authors |
김춘호(Chun-Ho Kim) ; 김남욱(Nam-Wook Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.6.629 |
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Keywords |
내구성; 프리캐스트; 산업부산물; 혼화재료; 양생방법 durability; precast; industrial byproducts; admixture; curing method |
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Abstract |
In this study, with the aim of investigating improvements of the strength and durability of precast concrete according to the addition of mixed industrial byproducts, a specimen was produced in which fly ash or blast furnace slag powder was mixed with cement; the compressive strength of the specimen was set to two types, 30 MPa and 45 MPa, and the characteristics of the manufactured specimen were compared using water curing method and steam curing method, which are used for precast concrete manufacturing. As a result of dry shrinkage deformation characteristics and chloride ion penetration test, concrete specimens manufactured using fly ash or blast furnace slag powder tended to decrease in dry shrinkage deformation and an effect of inhibiting chloride ion penetration was confirmed. Therefore, in the scope of this study, it is judged that the use of blast furnace slag powder and fly ash is valid when manufacturing precast concrete.
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