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A platform for research: civil engineering, architecture and urbanism
SALT DAMAGE COUNTERMEASURE CONCRETE HARDENED BODY AND METHOD FOR PRODUCING THE SAME
PROBLEM TO BE SOLVED: To provide a salt damage countermeasure hardened body having chloride infiltration suppression effect and crack resistance and whole surface is densified, and a method for producing the same.SOLUTION: Provided is a salt damage countermeasure concrete hardened body obtained by subjecting a concrete hardened body using a binder made of low heat portland cement and/or middle heat cement of 65 to 90 pts., a calcium ferroaluminate compound of 3 to 20 pts. and an expansion material of 5 to 15 pts. to carbonization curing and whose surface is densified. Also provided is a salt damage countermeasure concrete hardened body in which the expansion material, in 100 pts. of the total of free lime and calcium alumino ferrite, includes the free lime in the ratio of 50 to 90 pts. and the calcium alumino ferrite in the ratio of 10 to 50 pts. Also provided is a salt damage countermeasure concrete hardened body in which the expansion material, in 100 pts. of the total of free lime, calcium alumino ferrite and anhydrous gypsum, includes free lime in the ratio of 30 to 70 pts., calcium alumino ferrite in the ratio of 20 to 60 pts. and the anhydrous gypsum in the ratio of 30 pts. or less. Also provided is a method for producing salt damage countermeasure concrete carbonized and cured on and after the material age 21 day after concrete placing. Also provided is a salt damage suppression method for reinforced-concrete using any salt damage countermeasure concrete.SELECTED DRAWING: None
【課題】塩化物浸透抑制効果とひび割れ抵抗性を有する、表層を緻密化した塩害対策コンクリート硬化体およびその製造方法を提供する。【解決手段】低熱ポルトランドセメント及び／又は中庸熱セメントを65〜90部、カルシウムフェロアルミネート化合物を３〜20部、膨張材を５〜15部からなる結合材を用いたコンクリート硬化体を炭酸化養生して、表層を緻密化した塩害対策コンクリート硬化体、膨張材が、遊離石灰およびカルシウムアルミノフェライトの合計100部中、遊離石灰を50〜90部、カルシウムアルミノフェライトを10〜50部の割合で含有してなる塩害対策コンクリート硬化体、膨張材が、遊離石灰、カルシウムアルミノフェライト、及び無水石膏の合計100部中、遊離石灰を30〜70部、カルシウムアルミノフェライトを20〜60部、無水石膏を30部以下の割合で含有する塩害対策コンクリート硬化体、コンクリート打設後、材齢21日以降に炭酸化養生する塩害対策コンクリートの製造方法、いずれかの塩害対策コンクリートを用いた鉄筋コンクリートの塩害抑制方法である。【選択図】なし
SALT DAMAGE COUNTERMEASURE CONCRETE HARDENED BODY AND METHOD FOR PRODUCING THE SAME
PROBLEM TO BE SOLVED: To provide a salt damage countermeasure hardened body having chloride infiltration suppression effect and crack resistance and whole surface is densified, and a method for producing the same.SOLUTION: Provided is a salt damage countermeasure concrete hardened body obtained by subjecting a concrete hardened body using a binder made of low heat portland cement and/or middle heat cement of 65 to 90 pts., a calcium ferroaluminate compound of 3 to 20 pts. and an expansion material of 5 to 15 pts. to carbonization curing and whose surface is densified. Also provided is a salt damage countermeasure concrete hardened body in which the expansion material, in 100 pts. of the total of free lime and calcium alumino ferrite, includes the free lime in the ratio of 50 to 90 pts. and the calcium alumino ferrite in the ratio of 10 to 50 pts. Also provided is a salt damage countermeasure concrete hardened body in which the expansion material, in 100 pts. of the total of free lime, calcium alumino ferrite and anhydrous gypsum, includes free lime in the ratio of 30 to 70 pts., calcium alumino ferrite in the ratio of 20 to 60 pts. and the anhydrous gypsum in the ratio of 30 pts. or less. Also provided is a method for producing salt damage countermeasure concrete carbonized and cured on and after the material age 21 day after concrete placing. Also provided is a salt damage suppression method for reinforced-concrete using any salt damage countermeasure concrete.SELECTED DRAWING: None
【課題】塩化物浸透抑制効果とひび割れ抵抗性を有する、表層を緻密化した塩害対策コンクリート硬化体およびその製造方法を提供する。【解決手段】低熱ポルトランドセメント及び／又は中庸熱セメントを65〜90部、カルシウムフェロアルミネート化合物を３〜20部、膨張材を５〜15部からなる結合材を用いたコンクリート硬化体を炭酸化養生して、表層を緻密化した塩害対策コンクリート硬化体、膨張材が、遊離石灰およびカルシウムアルミノフェライトの合計100部中、遊離石灰を50〜90部、カルシウムアルミノフェライトを10〜50部の割合で含有してなる塩害対策コンクリート硬化体、膨張材が、遊離石灰、カルシウムアルミノフェライト、及び無水石膏の合計100部中、遊離石灰を30〜70部、カルシウムアルミノフェライトを20〜60部、無水石膏を30部以下の割合で含有する塩害対策コンクリート硬化体、コンクリート打設後、材齢21日以降に炭酸化養生する塩害対策コンクリートの製造方法、いずれかの塩害対策コンクリートを用いた鉄筋コンクリートの塩害抑制方法である。【選択図】なし
SALT DAMAGE COUNTERMEASURE CONCRETE HARDENED BODY AND METHOD FOR PRODUCING THE SAME
塩害対策コンクリート硬化体およびその製造方法
SAKAI ETSURO (author) / MORIOKA MINORU (author) / HIGUCHI TAKAYUKI (author) / USHIRO MASATAKA (author)
2017-02-16
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
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