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The Properties of Flow and Compressive Strength of Mortar According In Replacement Ratio of Rapidly-Chilled Steel Slag Pine Aggregate
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 Title & Authors
The Properties of Flow and Compressive Strength of Mortar According In Replacement Ratio of Rapidly-Chilled Steel Slag Pine Aggregate
Cho Sung-Hyun; Kim Jin-Man; Kim Moon-Han; Han Ki-Suk;
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 Abstract
The steel slag, a by-product which is produced by refining pig iron during the manufacture of steel, is mainly used as road materials after aging. It is necessary to age steel slag for long time in air because the reaction with water and free-CaO in steel slag could make the expansion of volume. This problem prevents steel slag from being used as aggregate for concrete. However, steel slag used in this study was controled by a air-jet method which rapidly cools substance melted at a high temperature. The rapidly-chilled method would prevent from generation of free-CaO in steel slag. This study dealt with the influence of the using rate of rapidly-chilled steel slag on flow, dosage of SP, W/C ratio, and strength of mortar by statistical experimental design. Also, the results of this experiment were approved by statistical analysis methods, such as analysis of variance and F-testing. As results of F-testing, this paper proved at level of significance that the more the using rate of rapidly-chilled steel slag increased, the more this affected the enhancement of flow, the decrease of dosage of SP and W/C ratio, and the development of compressive strength. Also, considering the fluidity and compressive strength of mortar, it is desirable to use of rapidly-chilled steel slag for river sand.
 Keywords
rapidly-chilled steel slag;statistical analysis;flow;dosage of SP;
 Language
Korean
 Cited by
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