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Fundamental Characteristics of Concrete According to Fineness Modulus and Replacement Ratio of Crushed Sand
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 Title & Authors
Fundamental Characteristics of Concrete According to Fineness Modulus and Replacement Ratio of Crushed Sand
Yun, Yong-Ho; Choi, Jong-Oh; Lee, Dong-Gyu; Jung, Yong-Wook;
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 Abstract
The paper evaluates the effect of the physical property, fineness modulus (FM) and replacement ratio of crushed sand on the characteristics of concrete. This is intended to use crushed sand from Daegu-Kyungbuk region as the fine aggregate of concrete. The experimental result indicates that the replacement ratio of crushed sand needs to be less than 50% to satisfy the mixed gradation of both natural and crushed sand when their FMs are 2.0 and 3.2, respectively. The slump of concrete with crushed sand increased as the replacement ratio of crushed sand increased, while the workability of concrete with the replacement ratio of more than 75% was significantly reduced. The air content and bleeding rate of concrete was reduced as the replacement ratio increased. Furthermore, due to the enhancement of the concrete adhesive regardless of the FM of crushed sand, compressive strength of concrete tended to improve as the replacement ratio increased.
 Keywords
Crushed sand;Physical properties;Fineness modulus;Particle shape;
 Language
Korean
 Cited by
 References
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