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http://dx.doi.org/10.5345/JKIBC.2018.18.6.517

Suggestion of the Prediction Model for Material Properties and Creep of 60~80MPa Grade High Strength Concrete  

Moon, Hyung-Jae (Architecturural Technology Design Team, Lotte E& C)
Koo, Kyung-Mo (R& D Center, Asia Cement Co., LTD.)
Kim, Hong-Seop (Department of Architecture, The University of Tyoko)
Seok, Won-Kyun (R& D Center, Lotte E& C)
Lee, Byeong-Goo (Architecturural Technology Design Team, Lotte E& C)
Kim, Gyu-Yong (Department of Architectural Engineering, Chungnam University)
Publication Information
Journal of the Korea Institute of Building Construction / v.18, no.6, 2018 , pp. 517-525 More about this Journal
Abstract
The construction of super tall building which structure is RC and must be certainly considered on column shortening estimation and construction reflected concrete creep has been increased. Regarding the Fck 60~80MPa grade high strength concrete applied in the domestic super tall building project, the mechanical properties and creep deflection according to curing conditions(Drying creep/Basic creep) were reviewed in this research. Results of compressive strength and elastic modulus under sealed curing condition were 5% higher than unsealed condition and difference of results according to the curing condition was increased over time. Autogenous and drying shrinkage tendency showed adversely in the case of high strength concrete. Additionally, creep modulus under unseal curing condition was evaluated 2~3 times higher than sealed condition. Modified model of ACI-209 based on test result was applied to estimate long period shortening of vertical members(such as Core Wall/Mega Column) exactly, it is designed to modify and suggest the optimal creep model based on various data accumulated during construction, in the future.
Keywords
high strength concrete; modulus of compressive creep; compressive strength; modulus of elasticity; autogenous shrinkage; drying shrinkage;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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