[논문]Compressive Creep and Shrinkage of High-Strength Concrete Based on Limestone Coarse Aggregate Applied to High-Rise Buildings

Hwang, Euichul; Kim, Gyuyong; Koo, Kyungmo; Moon, Hyungjae; Choe, Gyeongcheol; Suh, Dongkyun; Nam, Jeongsoo

doi:10.3390/ma14175026

[해외논문] Compressive Creep and Shrinkage of High-Strength Concrete Based on Limestone Coarse Aggregate Applied to High-Rise Buildings 원문보기

Materials, v.14 no.17, 2021년, pp.5026 -

Hwang, Euichul (Department of Architectural Engineering, Chungnam National University, 99 Daehak-ro, Daejeon 34134, Korea) , Kim, Gyuyong (sksdmlcjf@naver.com (E.H.)) , Koo, Kyungmo (speed1382@gmail.com (G.C.)) , Moon, Hyungjae (syhtw@naver.com (D.S.)) , Choe, Gyeongcheol (j.nam@cnu.ac.kr (J.N.)) , Suh, Dongkyun (Department of Architectural Engineering, Chungnam National University, 99 Daehak-ro, Daejeon 34134, Korea) , Nam, Jeongsoo (sksdmlcjf@naver.com (E.H.))

Abstract ▼ AI-Helper

Concrete undergoes shrinkage regardless of the influence of external forces. The deformation of concrete is crucial for the structural stability of high-rise and large-scale buildings. In this study, the shrinkage and compressive creep of 70–90 MPa high-strength concrete used in high-rise buildings were evaluated based on the curing conditions (sealed/unsealed), and the existing prediction models were examined. It was observed that the curing condition does not significantly affect the mechanical properties of high-strength concrete, but the use of limestone coarse aggregate increases the elastic modulus when compared to granite coarse aggregate. The autogenous shrinkage of high-strength concrete is greater than that of normal-strength concrete owing to self-desiccation, resulting in a large variation from the value predicted by the model. The drying shrinkage was observed to be similar to that predicted by the model. Compressive creep was affected by the curing conditions, compressive strength, loading level, and loading age. The compressive creep of high-strength concrete varied significantly from the prediction results of ACI 209; ACI 209 was modified based on the measured values. The shrinkage and compressive creep characteristics of high-strength concrete must be reflected to predict the deformation of an actual structure exposed to various conditions.

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