A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
REDUCTION MATERIAL FOR CIVIL ENGINEERING MATERIAL
PROBLEM TO BE SOLVED: To provide a reduction material for a civil engineering material having excellent reduction performance capable of reducing a trace amount of hexavalent chromium, etc. contained in a civil engineering material that can effectively suppress the elution of hexavalent chromium, etc. from the civil engineering material, and secure appropriate volume stability of the civil engineering material.SOLUTION: A reduction material for a civil engineering material includes: steel-making slag (A) whose FeO amount is 8 mass% or more, T-Fe amount is 10 mass% or more, total of AlOamount and FeOamount is less than 20 mass%, and CaO/SiO(mass ratio) is 1.0 or more and less than 2.0; and unaged air-cooled blast furnace slag (B). An expansion coefficient of the steel-making slag (A) is 1.5% or less when immersed in warm water of 80°C for 10 days, and a mass ratio of the steel-making slag (A) to the unaged air-cooled blast furnace slag (B) is 20:80 to 80:20.
【課題】土木材料に微量に含まれる６価クロム等を還元できる優れた還元性能を有し、土木材料からの６価クロム等の溶出を効果的に抑制できるとともに、土木材料の適切な体積安定性を確保することができる土木材料用還元材を提供する。【解決手段】ＦｅＯ量が８質量％以上、Ｔ-Ｆｅ量が１０質量％以上、Ａｌ２Ｏ３量とＦｅ２Ｏ３量の合計が２０質量％未満、ＣａＯ／ＳｉＯ２（質量比）が１．０以上２．０未満の製鋼スラグ（Ａ）と、未エージングの高炉徐冷スラグ（Ｂ）とからなり、製鋼スラグ（Ａ）は、８０℃温水に１０日間浸漬した際の膨張率が１．５％以下であり、製鋼スラグ（Ａ）と高炉徐冷スラグ（Ｂ）の質量比が２０：８０〜８０：２０である。【選択図】図１
REDUCTION MATERIAL FOR CIVIL ENGINEERING MATERIAL
PROBLEM TO BE SOLVED: To provide a reduction material for a civil engineering material having excellent reduction performance capable of reducing a trace amount of hexavalent chromium, etc. contained in a civil engineering material that can effectively suppress the elution of hexavalent chromium, etc. from the civil engineering material, and secure appropriate volume stability of the civil engineering material.SOLUTION: A reduction material for a civil engineering material includes: steel-making slag (A) whose FeO amount is 8 mass% or more, T-Fe amount is 10 mass% or more, total of AlOamount and FeOamount is less than 20 mass%, and CaO/SiO(mass ratio) is 1.0 or more and less than 2.0; and unaged air-cooled blast furnace slag (B). An expansion coefficient of the steel-making slag (A) is 1.5% or less when immersed in warm water of 80°C for 10 days, and a mass ratio of the steel-making slag (A) to the unaged air-cooled blast furnace slag (B) is 20:80 to 80:20.
【課題】土木材料に微量に含まれる６価クロム等を還元できる優れた還元性能を有し、土木材料からの６価クロム等の溶出を効果的に抑制できるとともに、土木材料の適切な体積安定性を確保することができる土木材料用還元材を提供する。【解決手段】ＦｅＯ量が８質量％以上、Ｔ-Ｆｅ量が１０質量％以上、Ａｌ２Ｏ３量とＦｅ２Ｏ３量の合計が２０質量％未満、ＣａＯ／ＳｉＯ２（質量比）が１．０以上２．０未満の製鋼スラグ（Ａ）と、未エージングの高炉徐冷スラグ（Ｂ）とからなり、製鋼スラグ（Ａ）は、８０℃温水に１０日間浸漬した際の膨張率が１．５％以下であり、製鋼スラグ（Ａ）と高炉徐冷スラグ（Ｂ）の質量比が２０：８０〜８０：２０である。【選択図】図１
REDUCTION MATERIAL FOR CIVIL ENGINEERING MATERIAL
土木材料用還元材
TAKAHASHI KATSUNORI (author) / WATANABE KEIJI (author) / KUWAYAMA MICHIHIRO (author)
2015-10-08
Patent
Electronic Resource
Japanese
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