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HIGH-STRENGTH CONCRETE AND PRODUCTION METHOD OF CONCRETE MEMBER
PROBLEM TO BE SOLVED: To provide a high-strength concrete which secures good constructability, flowability and ease of kneading/mixing and furthermore enables a concrete member having a compression strength of nearly 300 N/mmto be constructed, and to provide a production method of a concrete member.SOLUTION: There is provided the high-strength concrete that contains a concrete mixed body and steel fiber. The concrete mixed body is obtained by mixing; low heat cement added to cement in an amount in the range of 240 to 290 L per 1 mof the concrete mixed body; fly ash added to the cement in an amount in the range of 25 to 80 L per 1 mof the concrete mixed body; silica stone powder added to the cement in an amount in the range of 40 to 90 L per 1 mof the concrete mixed body; silica fume added to the cement in an amount in the range of 70 to 100 L per 1 mof the concrete mixed body; fine aggregate added to the cement in an amount in the range of 180 to 290 L per 1 mof the concrete mixed body, coarse aggregate added to the cement in an amount in the range of 90 to 120 L per 1 mof the concrete mixed body; and water added to the cement in such a way that weight ratio of the water to a binding material containing the low heat cement and the fly ash or containing the silica stone powder and the silica fume is 11 to 13%. The steel fiber is added to the concrete mixed body in such a way that the volume ratio of the steel fiber to the concrete mixed body is 0.5 to 2% in terms of the volume of the steel fiber to the total volume of the steel fiber and of the concrete mixed body, a volume ratio of the silica stone powder to the total volume of the fly ash and the silica stone powder being 0.35 to 0.75.SELECTED DRAWING: None
【課題】良好な施工性・流動性・練り混ぜ性能を確保しつつ、圧縮強度が略３００Ｎ／ｍｍ２であるコンクリート部材を構築することを可能とした高強度コンクリートおよびコンクリート部材の製造方法を提供する。【解決手段】１ｍ３当たり２４０〜２９０Ｌの範囲内で添加された低熱セメントと、２５〜８０Ｌの範囲内で添加されたフライアッシュと、４０〜９０Lの範囲内で添加された珪石粉と、７０〜１００Ｌの範囲内で添加されたシリカフュームと、１８０〜２９０Ｌの範囲内で添加された細骨材と、９０〜１２０Ｌの範囲内で添加された粗骨材と、低熱セメントとフライアッシュまたは珪石粉とシリカフュームとを含む結合材に対する重量比が１１〜１３％となるように添加された水と、を混合してなるコンクリート混合体と、コンクリート混合体に対して外割りの容積比で０．５〜２％となるように添加された鋼繊維とが含まれ、前記フライアッシュおよび前記珪石粉の総量に対する前記珪石粉の容積比が０．３５〜０．７５である。【選択図】なし
HIGH-STRENGTH CONCRETE AND PRODUCTION METHOD OF CONCRETE MEMBER
PROBLEM TO BE SOLVED: To provide a high-strength concrete which secures good constructability, flowability and ease of kneading/mixing and furthermore enables a concrete member having a compression strength of nearly 300 N/mmto be constructed, and to provide a production method of a concrete member.SOLUTION: There is provided the high-strength concrete that contains a concrete mixed body and steel fiber. The concrete mixed body is obtained by mixing; low heat cement added to cement in an amount in the range of 240 to 290 L per 1 mof the concrete mixed body; fly ash added to the cement in an amount in the range of 25 to 80 L per 1 mof the concrete mixed body; silica stone powder added to the cement in an amount in the range of 40 to 90 L per 1 mof the concrete mixed body; silica fume added to the cement in an amount in the range of 70 to 100 L per 1 mof the concrete mixed body; fine aggregate added to the cement in an amount in the range of 180 to 290 L per 1 mof the concrete mixed body, coarse aggregate added to the cement in an amount in the range of 90 to 120 L per 1 mof the concrete mixed body; and water added to the cement in such a way that weight ratio of the water to a binding material containing the low heat cement and the fly ash or containing the silica stone powder and the silica fume is 11 to 13%. The steel fiber is added to the concrete mixed body in such a way that the volume ratio of the steel fiber to the concrete mixed body is 0.5 to 2% in terms of the volume of the steel fiber to the total volume of the steel fiber and of the concrete mixed body, a volume ratio of the silica stone powder to the total volume of the fly ash and the silica stone powder being 0.35 to 0.75.SELECTED DRAWING: None
【課題】良好な施工性・流動性・練り混ぜ性能を確保しつつ、圧縮強度が略３００Ｎ／ｍｍ２であるコンクリート部材を構築することを可能とした高強度コンクリートおよびコンクリート部材の製造方法を提供する。【解決手段】１ｍ３当たり２４０〜２９０Ｌの範囲内で添加された低熱セメントと、２５〜８０Ｌの範囲内で添加されたフライアッシュと、４０〜９０Lの範囲内で添加された珪石粉と、７０〜１００Ｌの範囲内で添加されたシリカフュームと、１８０〜２９０Ｌの範囲内で添加された細骨材と、９０〜１２０Ｌの範囲内で添加された粗骨材と、低熱セメントとフライアッシュまたは珪石粉とシリカフュームとを含む結合材に対する重量比が１１〜１３％となるように添加された水と、を混合してなるコンクリート混合体と、コンクリート混合体に対して外割りの容積比で０．５〜２％となるように添加された鋼繊維とが含まれ、前記フライアッシュおよび前記珪石粉の総量に対する前記珪石粉の容積比が０．３５〜０．７５である。【選択図】なし
HIGH-STRENGTH CONCRETE AND PRODUCTION METHOD OF CONCRETE MEMBER
高強度コンクリートおよびコンクリート部材の製造方法
YAMAMOTO YOSHIKI (author) / OTA TAKASHI (author) / NAMIKI SATORU (author)
2016-03-07
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
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