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Title |
Effect of Ambient Environmental Variations on Early Compressive Strength Development of Concrete
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Authors |
홍성욱(Sung-Wook Hong) ; 서은아(Eun-A Seo) ; 이호재(Ho-Jae Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2025.29.5.21 |
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Keywords |
압축강도 발현; 초기 재령; 외기 환경 변수; 적산온도법; 데이터 군집화 분석 Compressive strength development; Early age; Ambient environmental variables; Maturity method; Data clustering analysis |
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Abstract |
This study investigates how ambient climate conditions influence the early age compressive strength of cast in place concrete and evaluates the feasibility of predicting strength from external weather data alone. Field compressive strength results from a construction site in Ho Chi Minh City, Vietnam, were paired with climate records for the curing period. The relationship between cumulative ambient temperature and the 7 day compressive strength was first examined. To account for other major climatic factors, K means clustering based on humidity, wind speed, and precipitation grouped the data into three clusters: general conditions, high wind conditions, and frequent rainfall conditions. Under rainfall dominant conditions, the correlation between temperature and strength weakened, likely due to surface cooling and delayed hydration. In contrast, partitioning by wind condition and using a maturity index based on ambient temperature produced stable regressions for the other clusters. The proposed approach enables early age quality control and scheduling without embedded sensors, supporting structural maintenance and site operations in hot and humid regions.
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