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http://dx.doi.org/10.14481/jkges.2011.12.12.3

Geoenvironmental Influence on the Recycled Soil from Demolition Concrete Structures for using in Low Landfilling  

Shin, Eun-Chul (인천대학교 도시과학대학 건설환경공학전공, 인천방재연구센터)
Kang, Jeong-Ku (인천대학교 도시과학대학 건설환경공학전공)
Ahn, Min-Hee (인천대학교 도시과학대학 건설환경공학전공)
Publication Information
Journal of the Korean GEO-environmental Society / v.12, no.12, 2011 , pp. 21-30 More about this Journal
Abstract
The recycled soil that is proceeded from demolition concrete structures was analyzed by the methods of the physical and mechanical tests of soil and TCLP test to use the soil in low landfilling for the construction of an industrial complex. The laboratory test for diffusion of alkali ion in soil mass was analyzed by the methods of XRF and ICP. The fish toxicity test was also conducted to find an environmental influence. The recycled soil through the laboratory test satisfied the engineering property for low landfilling and the criteria of soil contamination. However, the solution which producted by 1:1 ratio of recycled soil and water contained the high pH concentration by alkali ion. The calcium hydroxide solution by CSH cement paste was estimated as the main reason why pH concentration is increased more than 9.0. The high pH concentration in recycled soils causes a toxicity to the livability of fishes. A diffusion area of pH concentration in the ground was analyzed by the Visual Modflow Ver. 2009 program based on geotechnical investigation. The high pH concentration in the recycled soils can be remained as high value due to cement paste in the long term period. Therefore, in the early stage of landfilling work, the mixing with the weathered granite soil is necessary to control the pH concentration.
Keywords
Recycled soil; Alkali ion; Diffusion; Potential hydrogen; Fish toxicity; Weathered granite soil;
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Times Cited By KSCI : 1  (Citation Analysis)
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