Effect of Soil Organic Matters in Dredged Soils to Utilization of their Mixtures Made with a Steel Slag

Toda, Kanako; Kikuchi, Ryosuke; Otake, Tsubasa; Nishimura, Satoshi; Akashi, Yuzoh; Aimoto, Michihiro; Kokado, Takeshi; Sato, Tsutomu

Effect of Soil Organic Matters in Dredged Soils to Utilization of their Mixtures Made with a Steel Slag

Toda, Kanako; Kikuchi, Ryosuke; Otake, Tsubasa et al.

Materials, 2020, 13(23), 5450

Permalink : https://hdl.handle.net/2115/80444

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アクセス権	open access
URI	https://hdl.handle.net/2115/80444
タイトル	Effect of Soil Organic Matters in Dredged Soils to Utilization of their Mixtures Made with a Steel Slag
著者	Toda, Kanako ; Kikuchi, Ryosuke ; Otake, Tsubasa ; Nishimura, Satoshi ; Akashi, Yuzoh ; Aimoto, Michihiro ; Kokado, Takeshi ; Sato, Tsutomu
著者名 Toda, Kanako
e-Rad_Researcher 50832854 著者名 Kikuchi, Ryosuke
e-Rad_Researcher 80544105 著者名 Otake, Tsubasa
e-Rad_Researcher 70470127 著者名 Nishimura, Satoshi
著者名 Akashi, Yuzoh
著者名 Aimoto, Michihiro
著者名 Kokado, Takeshi
e-Rad_Researcher 10313636 著者名 Sato, Tsutomu
言語	英語
キーワード	steel slag
	dredged soil
	soil organic matters
	strength inhibition
	pozzolanic reaction
発行日	2020-11-30
出版者	MDPI
収録物名	Materials
巻(号)	13(23)
ページ	5450
抄録	Dredged soils have been used as construction materials by alkaline activation with steel slag (steel slag-dredged soil mixtures) at harbors. Such mixtures develop strength chiefly by calcium silicate hydrate (C-S-H) formation by the pozzolanic reaction. However, the strength of such mixtures is unpredictable, and in some cases, mixtures have been too soft for the intended engineering application. An identification of strength development indicators would accelerate evaluation processes for strength development to facilitate and promote the utilization of such materials. This paper focuses on the relationship between the characteristics of soil organic matters in dredged soils and the strength development of the mixtures by a comparison of eight dredged soils collected from eight different Japanese harbors. The characteristics of the soil organic matters were identified to determine as indicators of mixtures with weak strength development, i.e., enriched sulfur content in extracted soil organic matter (humic acid) fraction, and the N/C ratio of humic acid similar to land humic acid standards. Increases in the validated fraction of dredged soils and steel slag by replacing fractions disadvantageous to construction resources would contribute to reduce waste production, which would lower the environmental impact of the use, aiming to achieve sustainable utilization of such materials.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/ma13235450