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http://dx.doi.org/10.12925/jkocs.2013.30.4.575

Fundamental Study on Recycling as Construction Material of Dredged Harbor Soil Mixed with Clay and Glass Frit  

Im, Dong-Su (Korea Marine Environment Management Corporation)
Kim, Kyung-Nam (Dept. of Advanced Materials Eng., Kangwon National University)
Cho, Yeon-Bae (Daejin E&D. Ltd.)
Park, Joon-Seok (Dept. of Env. Eng., Kangwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.30, no.4, 2013 , pp. 575-585 More about this Journal
Abstract
This research was performed to evaluate the recycling feasibility as a construction material of dredged harbor soil mixed with clay and glass frit. Concentration of heavy metals of the dredged soil from D harbor was severly high, showing Zn of 526.0~13,150.1 mg/kg. The dredged soil was maily composed of 48.30 wt% $SiO_2$, 16.60 wt% $Al_2O_3$, 10.10 wt% CaO, 7.75 wt% $Fe_2O_3$. The clay and the glass frit contained 70.82 wt% $SiO_2$ and $Al_2O_3$ 18.78 wt%, and 71.75 wt% $SiO_2$, 13.99 wt% CaO, 8.51 wt% $Na_2O$, respectively. After adding 10~40 wt% to the clay and sintering them at $1,000^{\circ}C$ or $1,100^{\circ}C$, the compressive strength of the sintered specimens showed $132.6{\sim}178.5kgf/cm^2$ or $581.2{\sim}793.7kgf/cm^2$, respectively. In case of SC46 with the addition 40 wt% of the dredged soil to the clay, the compressive strength ($793.7kgf/cm^2$) of specimen sintered at $1,100^{\circ}C$ was over 5 times higher than that at $1,000^{\circ}C$. The specimen mixed with 40 wt% of dredged soil, 60 wt% of clay and 1 wt% of glass frit satisfied the 1st grade standard for clay brick by KS L 4201. The results of all specimens by Korean Standard Leaching Test also satisfied the standard criteria.
Keywords
Dredged harbor soil; Clay; Glass frit; Heavy metals; Sintering; Compressive Strength;
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