A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
REINFORCEMENT METHOD FOR EXISTING BRIDGE PIER, MANUFACTURING METHOD FOR REINFORCED BRIDGE PIER, POLYMER CEMENT MORTAR, AND REINFORCED BRIDGE PIER
PROBLEM TO BE SOLVED: To enable bridge pier reinforcement while securing sufficient strength and durability, at low cost and through a simple process.SOLUTION: A reinforcement method for an existing plain concrete bridge pier includes: a first step in which a reinforcing bar is arranged around an existing bridge pier; a second step following the first step in which the existing bridge pier and the reinforcing bar are covered by polymer cement mortar made by mixing a polymer cement composition with water, the polymer cement composition including cement, a fine aggregate, a fluidizing agent, and a re-emulsified powdery resin; and a third step following the second step in which the polymer cement mortar is cured to make a cured mortar body. The polymer cement composition contains the fine aggregate of 80 to 130 parts by mass and the re-emulsified powdery resin of 0.2 to 2.6 parts by mass blended in the cement of 100 parts by mass. Compression strength of the cured mortar body at the age of 28 days, measured as provided in the JIS A 1108, is 75 N/mmor more.SELECTED DRAWING: Figure 1
【課題】十分な強度及び耐久性を確保しつつ、低コストで簡便な施工を実現する。【解決手段】無筋コンクリート製の既存橋脚を補強するための補強方法は、既存橋脚の周りに補強鉄筋を配筋する第１の工程と、第１の工程の後、セメント、細骨材、流動化剤、及び再乳化形粉末樹脂を含有するポリマーセメント組成物と水とを混合してなるポリマーセメントモルタルによって既存橋脚及び補強鉄筋を覆う第２の工程と、第２の工程の後に、ポリマーセメントモルタルを硬化してモルタル硬化体とする第３の工程とを含む。ポリマーセメント組成物は、セメント１００質量部に対して、細骨材を８０質量部〜１３０質量部、及び再乳化形粉末樹脂を０．２質量部〜２．６質量部含有する。ＪＩＳ Ａ １１０８に基づいて測定されるモルタル硬化体の材齢２８日における圧縮強度は７５Ｎ／ｍｍ２以上である。【選択図】図１
REINFORCEMENT METHOD FOR EXISTING BRIDGE PIER, MANUFACTURING METHOD FOR REINFORCED BRIDGE PIER, POLYMER CEMENT MORTAR, AND REINFORCED BRIDGE PIER
PROBLEM TO BE SOLVED: To enable bridge pier reinforcement while securing sufficient strength and durability, at low cost and through a simple process.SOLUTION: A reinforcement method for an existing plain concrete bridge pier includes: a first step in which a reinforcing bar is arranged around an existing bridge pier; a second step following the first step in which the existing bridge pier and the reinforcing bar are covered by polymer cement mortar made by mixing a polymer cement composition with water, the polymer cement composition including cement, a fine aggregate, a fluidizing agent, and a re-emulsified powdery resin; and a third step following the second step in which the polymer cement mortar is cured to make a cured mortar body. The polymer cement composition contains the fine aggregate of 80 to 130 parts by mass and the re-emulsified powdery resin of 0.2 to 2.6 parts by mass blended in the cement of 100 parts by mass. Compression strength of the cured mortar body at the age of 28 days, measured as provided in the JIS A 1108, is 75 N/mmor more.SELECTED DRAWING: Figure 1
【課題】十分な強度及び耐久性を確保しつつ、低コストで簡便な施工を実現する。【解決手段】無筋コンクリート製の既存橋脚を補強するための補強方法は、既存橋脚の周りに補強鉄筋を配筋する第１の工程と、第１の工程の後、セメント、細骨材、流動化剤、及び再乳化形粉末樹脂を含有するポリマーセメント組成物と水とを混合してなるポリマーセメントモルタルによって既存橋脚及び補強鉄筋を覆う第２の工程と、第２の工程の後に、ポリマーセメントモルタルを硬化してモルタル硬化体とする第３の工程とを含む。ポリマーセメント組成物は、セメント１００質量部に対して、細骨材を８０質量部〜１３０質量部、及び再乳化形粉末樹脂を０．２質量部〜２．６質量部含有する。ＪＩＳ Ａ １１０８に基づいて測定されるモルタル硬化体の材齢２８日における圧縮強度は７５Ｎ／ｍｍ２以上である。【選択図】図１
REINFORCEMENT METHOD FOR EXISTING BRIDGE PIER, MANUFACTURING METHOD FOR REINFORCED BRIDGE PIER, POLYMER CEMENT MORTAR, AND REINFORCED BRIDGE PIER
既存橋脚の補強方法、補強橋脚の製造方法、ポリマーセメントモルタル、及び補強橋脚
KAWAMOTO TAKANORI (author) / HIROTSU KAZUO (author)
2016-06-30
Patent
Electronic Resource
Japanese
| European Patent Office | 2016