STUDY ON IMPROVED MATERIAL OF SUBGRADE SOIL USING POWDER OF INDUSTRIAL BYPRODUCT

産業副産物の微粉末を用いた路床改良材に関する研究

In the authors' country, in connection with economic development, the industrial by-product is discharged so much, the reuse of materials is promoted more than formerly, and to control waste disposal as much as possible is desired. For example, the ferro-nickel slag (FNS) which is a by-product of nonferrous-metal refinement is reused as fine aggregate, however it has not resulted in reuse about fine powder. The fine powder of iron oxide generated as dust-collecting dust is used abundantly as improved material of subgrade soil, but there are several problems which should be made clear. A purpose of this study is to use the materials which mixed lime to FNS and the iron oxide as improvement materials of subgrade soil. As a result, the mixed ratio of between the fine powder and the lime which was expected the strength development clarified by the unconfined compression test. Furthermore, the effect of those improved materials was confirmed by mixing to the decomposed granite.　我が国では経済発展に伴い産業副産物が多量に排出されており，それらの再利用を今まで以上に推し進め，廃棄処理をできるだけ抑制することが望まれている．例えば，非鉄金属精錬の副産物であるフェロニッケルスラグ（FNS）は，細骨材として再利用されているが，微粉末については再利用に至っていない．また，集塵ダストとして発生する微粉酸化鉄は，路床改良材として多用されているが，その性状には多くの解明すべき点がある．そこで，本研究では，FNSと酸化鉄の微粉末の再利用を目的に，それぞれに消石灰を混合し，室内試験を行い，路床改良材としての適用性について検証した．その結果，最も強度発現が期待できる混合割合を明らかにし，これをまさ土に混入した場合の路床改良材としての有効性について確認した．

• Record URL:
  • https://doi.org/10.2208/jscejpe.68.I_89
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=STUDY+ON+IMPROVED+MATERIAL+OF+SUBGRADE+SOIL+USING+POWDER+OF+INDUSTRIAL+BYPRODUCT&author=Y.+SHOJIMA&author=S.+AKIBA&author=Y.+KANOU&author=M.+I&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/21856559
• Authors:
  • SHOJIMA, Yoshitaka
  • AKIBA, Shoichi
  • KANOU, Yousuke
  • I, Masahiro
• Publication Date: 2012

Language

• English
• Japanese

Media Info

• Media Type: Web
• Pagination: pp 89-95
• Serial:
  • Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)
  • Volume: 68
  • Issue Number: 3
  • Publisher: Japan Society of Civil Engineers
  • ISSN: 2185-6559
  • Serial URL: https://www.jstage.jst.go.jp/browse/jscejpe/-char/en

Subject/Index Terms

• TRT Terms: Fine aggregates; Industrial wastes; Iron oxides; Limestone; Powders; Recycled materials; Slag; Subgrade materials; Waste products (Materials)
• Subject Areas: Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01504709
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Jan 27 2014 9:40AM