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Analysis of the Optimum Usage of Slag for the Compressive Strength of Concrete

Title
Analysis of the Optimum Usage of Slag for the Compressive Strength of Concrete
Author
이한승
Keywords
HYDRATION; ADMIXTURES; SIMULATION
Issue Date
2015-03
Publisher
MDPI AG
Citation
MATERIALS, v. 8, No. 3, Page. 1213-1229
Abstract
Ground granulated blast furnace slag is widely used as a mineral admixture to replace partial Portland cement in the concrete industry. As the amount of slag increases, the late-age compressive strength of concrete mixtures increases. However, after an optimum point, any further increase in slag does not improve the late-age compressive strength. This optimum replacement ratio of slag is a crucial factor for its efficient use in the concrete industry. This paper proposes a numerical procedure to analyze the optimum usage of slag for the compressive strength of concrete. This numerical procedure starts with a blended hydration model that simulates cement hydration, slag reaction, and interactions between cement hydration and slag reaction. The amount of calcium silicate hydrate (CSH) is calculated considering the contributions from cement hydration and slag reaction. Then, by using the CSH contents, the compressive strength of the slag-blended concrete is evaluated. Finally, based on the parameter analysis of the compressive strength development of concrete with different slag inclusions, the optimum usage of slag in concrete mixtures is determined to be approximately 40% of the total binder content. The proposed model is verified through experimental results of the compressive strength of slag-blended concrete with different water-to-binder ratios and different slag inclusions.
URI
https://www.mdpi.com/1996-1944/8/3/1213/htmhttp://repository.hanyang.ac.kr/handle/20.500.11754/106003
ISSN
1996-1944
DOI
10.3390/ma8031213
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ARCHITECTURE(건축학부) > Articles
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