| Title |
An Experimental Study on the Engineering Properties of Radiation Shielding Concrete According to the Replacement Ratio of Rapid-Chilled Steel Slag Fine Aggregate |
| Authors |
Kim Jin-Man ; Cho Sung-Hyun ; Kwon Ki-Joo ; Kim Moo-Han |
| Keywords |
Rapid-Chilled Steel Slag ; Radiation Shielding Concrete ; Slump ; Compressive Strength ; Shrinkage. Freezing and Thawing |
| Abstract |
The steel slag, a by-product which is produced during the manufacture of steel by refining pig iron, has generated about four million tons yearly. It is difficult to recycle steel slag as aggregate for concrete because the reaction with water and free-CaO in steel slag could make the expansion of volume. However, steel slag used in this study was controled by a air-jet method which rapidly cools substance melted at a high temperature. The instant-chilling method prevents from generation of free-CaO in steel slag. The rapidly-chilled steel slag is similar to be spherical shape and has the heavier specific gravity than natural aggregate. Therefore, it could be used to manufacture radiation shielding concrete as fine aggregate. This paper investigated a verity of the engineering properties of radiation shielding concrete when using rapid-chilled steel slag as fine aggregate. As results of this study, the increase of use of rapid-chilled steel slag decreased the desirable water content of concrete but developed the rate of radiation shielding of concrete. The strength of concrete using rapid-chilled steel slag is similar to that of concrete using river sand. |