• Journal of the Korean Geographical Society
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• v.44 no.4
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• pp.429-446
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• 2009

To understand the sulfur flux and cycle in the forest catchment, the hydrological processes and chemical variation of soil solution, groundwater and stream water were analyzed at the Matsuzawa catchment located in the Kiryu Experimental Basin, Shiga Prefecture, central Japan. Unsaturated soil layer at the upper slope of catchment was the source area of ${SO_4}^{2-}$, and deep soil layer and groundwater were the sink zone of ${SO_4}^{2-}$. The vertical distribution of ${SO_4}^{2-}$ concentrations in groundwater affected seasonal variation of ${SO_4}^{2-}$ concentrations in stream water, as groundwater level changed. It is reasonable to assume that each hydrological processes in the forest catchment play an important roles in the retention and discharge of ${SO_4}^{2-}$.

• 순환기질환의공학회:학술대회논문집
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• 2005.12a
• /
• pp.59-60
• /
• 2005

• Magazine of RCR
• /
• v.6 no.1
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• pp.22-27
• /
• 2011

• Magazine of RCR
• /
• v.9 no.3
• /
• pp.31-37
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• 2014

• Magazine of RCR
• /
• v.9 no.4
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• pp.29-32
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• 2014

• Magazine of RCR
• /
• v.13 no.4
• /
• pp.48-53
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• 2018

• Proceedings of the Korean Society of Community Living Science Conference
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• 2010.04a
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• pp.90-95
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• 2010

• Proceedings of the KTCVS Conference
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• 1998.10a
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• pp.48-48
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• 1998

• Cement Symposium
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• no.16
• /
• pp.64-70
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• 1988

• Journal of the Korean Recycled Construction Resources Institute
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• v.11 no.4
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• pp.509-516
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• 2023

The use of sulfur(S) in concrete has been variously studied as a way to improve salt resistance in concrete. However, sulfur is a solid material and is difficult to powder, which has disadvantages in its usability as an admixture or mixture for cement and concrete. For these problem, polymers such as dicyclopentadiene have been used to modify sulfur, but this also exists in a sticky state after modifying and does not improve the fundamental problem. So, reforming sulfur with slaked lime and the effect on cement hydration was examined by reforming sulfur with slaked lime, and the following conclusions were obtained. Depending on the reaction conditions, slaked lime modified bio-sulfur exists in a slurry state containing unreacted sulfur, unreacted slaked lime, calcium-sulfur(Ca-S) compounds and water. When slaked lime modified bio-sulfur is used as a cement mixture, salt resistance of concrete with slaked lime modified bio-sulfur is to be superior to that of plain concrete. This is believed to be because structure of cement hydrates with slaked lime modified bio-sulfur is to be more dense to that of plain cement hydrates by the continued presence of ettringite and can be used as a cement mixture in concrete.