A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LONG-DISTANCE PUMPING METHOD AND CONCRETE STRUCTURE CONSTRUCTION METHOD
To provide a long-distance pumping method that hardly causes a material separation and a setting delay even in a pump construction with large pumping load in which a concrete composition is pumped by increasing a pressure of a pump.SOLUTION: In the long-distance pumping method according to the present invention, a pumping aid is added to a concrete composition containing at least water, cement, and aggregate, and is mixed and the concrete composition after mixing is pumped using a pump. The aggregate includes fine aggregate of 0.3 mm or less. The amount of cement and fine aggregate powder of 0.3 mm or less in the concrete composition is 550 kg/m3 or more. The pumping aid includes at least (A) a polycarboxylic acid dispersant having a polyether chain in the side chain, and (B) an oxycarboxylic acid or a salt thereof.SELECTED DRAWING: Figure 1
【課題】本発明は、コンクリート組成物をポンプの圧力を高めて圧送する圧送負荷の大きいポンプ施工でも材料分離を起こしにくく、凝結遅延が生じない長距離圧送方法を提供する。【解決手段】本発明に係る長距離圧送方法は、少なくとも水、セメント及び骨材を含むコンクリート組成物に圧送助剤を添加して混合し、混合後のコンクリート組成物をポンプにより圧送する。骨材は０．３ｍｍ以下の細骨材を含む。コンクリート組成物におけるセメント及び０．３ｍｍ以下の細骨材の粉体量が５５０ｋｇ／ｍ３以上である。圧送助剤は、（Ａ）側鎖にポリエーテル鎖を有するポリカルボン酸系分散剤と、（Ｂ）オキシカルボン酸又はその塩とを少なくとも含む。【選択図】図１
LONG-DISTANCE PUMPING METHOD AND CONCRETE STRUCTURE CONSTRUCTION METHOD
To provide a long-distance pumping method that hardly causes a material separation and a setting delay even in a pump construction with large pumping load in which a concrete composition is pumped by increasing a pressure of a pump.SOLUTION: In the long-distance pumping method according to the present invention, a pumping aid is added to a concrete composition containing at least water, cement, and aggregate, and is mixed and the concrete composition after mixing is pumped using a pump. The aggregate includes fine aggregate of 0.3 mm or less. The amount of cement and fine aggregate powder of 0.3 mm or less in the concrete composition is 550 kg/m3 or more. The pumping aid includes at least (A) a polycarboxylic acid dispersant having a polyether chain in the side chain, and (B) an oxycarboxylic acid or a salt thereof.SELECTED DRAWING: Figure 1
【課題】本発明は、コンクリート組成物をポンプの圧力を高めて圧送する圧送負荷の大きいポンプ施工でも材料分離を起こしにくく、凝結遅延が生じない長距離圧送方法を提供する。【解決手段】本発明に係る長距離圧送方法は、少なくとも水、セメント及び骨材を含むコンクリート組成物に圧送助剤を添加して混合し、混合後のコンクリート組成物をポンプにより圧送する。骨材は０．３ｍｍ以下の細骨材を含む。コンクリート組成物におけるセメント及び０．３ｍｍ以下の細骨材の粉体量が５５０ｋｇ／ｍ３以上である。圧送助剤は、（Ａ）側鎖にポリエーテル鎖を有するポリカルボン酸系分散剤と、（Ｂ）オキシカルボン酸又はその塩とを少なくとも含む。【選択図】図１
LONG-DISTANCE PUMPING METHOD AND CONCRETE STRUCTURE CONSTRUCTION METHOD
長距離圧送方法及びコンクリート構造物の構築方法
HAJI KOICHI (author) / SAWAMURA ATSUMI (author) / NAKANO HIRONORI (author) / MORIYA KENICHI (author) / SHIINA TAKAYOSHI (author) / TAKAGI YUSUKE (author) / YAMAMOTO TAISUKE (author) / SHINOHARA AKIRA (author) / SAKUE TOMIO (author) / KIDO KUNIYA (author)
2024-08-26
Patent
Electronic Resource
Japanese
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