Compressive strength and iron-supply capacity of porous-type steel-making slag concrete

2015 Fiscal Year Final Research Report

• Project/Area Number: 25740043
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental conscious materials and recycle
• Research Institution: University of Miyazaki
• Principal Investigator: ONOUE Kozo 宮崎大学, 工学部, 助教 (50435111)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 製鋼スラグ / 鉄鋼スラグ水和固化体 / ポーラスコンクリート / 空隙率 / 水結合材比 / 腐植質 / 圧縮強度 / 鉄分供給性能

Outline of Final Research Achievements

Steel-making slag concrete (SSC) is an environmental-friendly material made of steel-making slag, ground granulated blast-furnace slag, coal fly ash, and so on. Special emphasis should be placed on that the steel-making slag can be a supply source of iron which is necessary for the growth of seaweed. In the present work, the applicability of POSSC where hot-metal pretreatment slag was used as iron-supply source into seaweed bed block was experimentally investigated. The following conclusions can be drawn: (1) The compressive strength and the iron elution velocity of POSSC, that are necessary for material design, can be predicted as a function of total void ratio of POSSC; (2) Replacing 2% of hot-metal pretreatment slag volume makes it possible for the iron-supply capacity of POSSC to be significantly improved, without sacrificing its compressive strength.

Free Research Field

コンクリート工学，環境材料