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http://dx.doi.org/10.14481/jkges.2011.12.7.4

Geotechnical Characteristics of Reduced Slag-soil Mixtures in Electric Furnace  

Shin, Jaewon (인하대학교 공과대학 토목공학과)
Yoon, Yeowon (인하대학교 공과대학 토목공학과)
Yoon, Gillim (한국해양연구원)
Publication Information
Journal of the Korean GEO-environmental Society / v.12, no.7, 2011 , pp. 31-37 More about this Journal
Abstract
Only a few studies have been conducted using reduced slag as recycled material. The reduced slag in electric furnace is produced as a by-product in making a steel and a few applications of the reduced slag as expensive additives and bonding materials or as the stabilized soils was reported. The purpose of this study is to present the feasibility of the reduced slag as recycled material, especially, in a field of civil engineering. In order to achieve the purpose experiments such as SEM and XRF analysis was conducted for the reduced slag in electric furnace. Based on the results various geotechnical experiments were conducted to know engineering properties of slag-soil mixtures. Weathered soils and clay are mixed with reduced slag for various ratios. As the ratio of reduced slag to weathered soil increases, the maximum dry unit weight of the mixture decreased with increasing optimum moisture content. The results indicates that there is no effect on a reduced slag by compaction efforts. The shear strengths of the weathered soil-slag mixtures are slightly higher or similar to those of weathered soils. The permeability of the weathered soil-slag mixtures is similar to that of silty or sandy soils. Therefore, it is possible to use the mixtures as embankment or backfill materials in the fields. The unconfined strength of the mixtures of reduced slag and clay is higher than that of clay and it tends to increase with the curing time. Therefore it can be used to improve the soft ground.
Keywords
Reduced slag; Recycled material; Shear strength; The unconfined strength; Soft ground;
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