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http://dx.doi.org/10.11112/jksmi.2012.16.6.063

Effects of Aggregate Grading on the Performance of High-Flowing Concrete with General Strength  

Kim, Sang Chel (한서대학교 토목공학과)
Kim, Yun Tae (서울과학기술대학교 구조공학과)
Shin, Dong Cheol (가천대학교 건축공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.16, no.6, 2012 , pp. 63-72 More about this Journal
Abstract
The high-flowing concrete requires additionally or excessively more expensive admixture than conventional concrete. So, the concrete has not to be widely used in practical field due to the increase of production price, need of additional facilities, and excessive development of concrete strength in associate with addition of too much cementitious material even though it has more significant advantages than conventional concrete. Thus, this study aims at developing high-flowing concrete with general strength unlike high strength which has been carried out in conventional study. To observe the role of aggregate in the concrete quantitatively and to increase the performance of high-flowing concrete effectively, parametric studies were carried out such as W/C, s/a, fineness modulus of aggregate, contribution degree of particle sizes, and the effect of 13mm aggregate and fine stone powder as a partial replacement of aggregates. And the effect of these factors on performance of the concrete was evaluated by measuring slump-flow and gap of penetration height in U-typed instrument. As a result, it was found that flowability of high-flowing concrete depends upon grading of fine aggregate more significantly than that of coarse aggregate and is enhanced greatly as fineness modulus of fine aggregate decreases and the value of s/a increases. In addition, the application of 13mm aggregate and fine stone powder are expected as a partial replacement of aggregate in order to increase the performance of high-flowing concrete more effectively.
Keywords
Grading; Fine aggregate ratio; Fineness modulus; Fine stone powder; 13mm aggregate;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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