Study on Measures for the Reduction of the Environmental Impact of Precast Concrete

プレキャストコンクリートの環境負荷低減策に関する検討

Although, in the design of a structure, structural and durability performance is considered, environmental performance, such as CO2 emissions, is rarely considered. This study investigated measures for the reduction of the environmental impact of precast concrete production through the use of industrial waste, industrial byproducts and recycled aggregates as well as omitting steam curing on hot days. It was found that SOx emissions can be reduced by about 14% by not performing stream curing for 45.7 days in a year, and that CO2 emissions can be reduced by about 18% by replacing 20% of ordinary portland cement with fly ash and 30% of fine aggregate with molten-slag fine aggregate.構造物設計の際には構造性能や耐久性能が重視されており，CO₂排出量などの環境性能が考慮されることは少ない。そこで本研究ではプレキャストコンクリート（以下PCa）製品に着目し，あるPCa製品製造の環境負荷評価を行った上で，廃棄物や産業副産物，再生骨材をコンクリート用材料として使用することと，蒸気養生を気温の高い日に限り行わないことで，環境負荷低減の観点からより有用なPCa製品を製造する方策の検討を行った。その結果，本研究で対象としたPCa製品工場では年間45.7日間蒸気養生を行わないことでSO_X排出量を約14%低減でき，フライアッシュを20％，細骨材の30%を溶融スラグ細骨材に置換することでCO₂排出量を約18%低減できた。

• Record URL:
  • https://doi.org/10.3151/crt.25.35
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=Study+on+Measures+for+the+Reduction+of+the+Environmental+Impact+of+Precast+Concrete&author=K.+Kawai&author=A.+Fujiki&author=D.+Akasaki&author=Y.+Tokuhisa&publication_year=2014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/13404733
• Authors:
  • Kawai, Kenji
  • Fujiki, Akihiro
  • Akasaki, Daiki
  • Tokuhisa, Youichi
• Publication Date: 2014

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 35-44
• Serial:
  • Concrete Research and Technology
  • Volume: 25
  • Issue Number: 0
  • Publisher: Japan Concrete Institute
  • ISSN: 1340-4733
  • EISSN: 2186-2745
  • Serial URL: https://www.jstage.jst.go.jp/browse/crt/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Environmental impacts; Fly ash; Industrial wastes; Pollutants; Portland cement; Precast concrete; Recycled materials; Steam curing
• Subject Areas: Construction; Environment; Highways; Materials; I15: Environment; I32: Concrete; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 01504670
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Jan 27 2014 9:40AM