LOW THIXOTROPIC AUXILIARY AGENT, SOLUBLE BAG-SHAPED ARTICLE AND CEMENT COMPOSITION

PROBLEM TO BE SOLVED: To provide a low thixotropic auxiliary agent that helps produce a hardened cement body sound as a structural body by preventing stiffening of a cement composition kept in a static state resulting from flocking, agglomeration and sedimentation of cement particles therein, by improving its workability, and by preventing defective working of construction.SOLUTION: The low thixotropic auxiliary agent comprises a component (A): a polyalkylene glycol of a weight average molecular weight of 10,000 to 30,000 and a component (B): an oxycarboxylic acid compound, and satisfies a condition (1): component (A)/component (B)=98/2 to 10/90 and a condition (2): being powder of a maximum particle diameter equal to or less than 10 mm. The low thixotropic auxiliary agent further comprises a component (C): a polycarboxylic acid copolymer of 40 to 85 mass% of a monomer (I) represented by formula (1), 10 to 50 mass% of an unsaturated carboxylic acid monomer (II) and 0 to 10 mass% of a monomer (III) that can be copolymerized with the monomer (I) and/or the monomer (II), or a salt thereof.SELECTED DRAWING: None 【課題】静的状態で保持されたセメント組成物中のセメント粒子の近接、凝集及び沈降による強ばりを防ぎ、施工性の改善と、施工不良を抑制し、構造体として健全なセメント硬化体を得られる低チキソトロピー性助剤の提供。【解決手段】（Ａ）成分：重量平均分子量が１０，０００〜３０，０００のポリアルキレングリコールと、（Ｂ）成分：オキシカルボン酸系化合物とを含み、条件（１）（Ａ）成分／（Ｂ）成分＝９８／２〜１０／９０及び条件（２）最大粒径が１０ｍｍ以下の粉体であるを満たす、低チキソトロピー性助剤。更に、（Ｃ）成分として式（１）で表される単量体（Ｉ）４０〜８５質量％と不飽和カルボン酸系単量体（ＩＩ）１０〜５０質量％と単量体（Ｉ）及び／又は単量体（ＩＩ）と共重合可能な単量体（ＩＩＩ）０〜１０質量％との共重体であるポリカルボン酸系共重合体又はその塩を含む低チキソトロピー性助剤。【選択図】なし