LITERATURE ＞JOURNALS [359667]

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Title 
바텀애시 및 준설토 기반 인공경량골재 콘크리트의 압축강도 발현 모델 제시 / Proposal for Compressive Strength Development Model of Lightweight Aggregate Concrete Using Expanded Bottom Ash and Dredged Soil Granules 
Authors 
이경호(Lee, KyungHo) ; 양근혁(Yang, KeunHyeok) 
Organization 
대한건축학회 
Source 
대한건축학회논문집 구조계, Vol.34 No.07(201807) 
Page 
Start Page(19) Total Page(8) 
ISSN 
12269107 
Classification 
구조 
Keywords 
경량골재 콘크리트 ; 압축강도 발현 ; 절건 밀도 ; 물시멘트 비 ; 모델//Lightweight aggregate concrete ; Compressive strength development ; Ovendried density ; Watertocement ratio ; fib model 
Abstract2 
This study tested 25 lightweight aggregate concrete (LWAC) mixtures using the expanded bottom ash and dredged soil granules to examine the compressive strength gain of such concrete with different ages. The test parameters investigated were watertocement ratios and the natural sand content for the replacement of lightweight fine aggregate. The compressive strength gain rate in the basic equation specified in fib model code was experimentally determined in each mixture and then empirically formulated as a function of the watertocement ratio and ovendried density of concrete. When compared with 28day compressive strength, the tested LWAC mixtures exhibited relatively low gain ratios (0.49~0.82) at an age of 3 days whereas the gain ratios (1.16~1.41) at 91 days were higher than that (1.05~1.15) of the conventional normalweight concrete. Thus, the fib model equations tend to overestimate the early strength gain of LWAC but underestimate the longterm strength gain. The proposed equations are in good agreement with the measured compressive strength development of LWAC at different ages, indicating that the mean and standard deviation of the normalized root mean square errors determined in each mixture are 0.101 and 0.053, respectively. 
Location 
대한건축학회 