SHRINKAGE REDUCING AGENT FOR HYDRAULIC COMPOSITION, AND HYDRAULIC COMPOSITION: Fid-Bau Portal

SHRINKAGE REDUCING AGENT FOR HYDRAULIC COMPOSITION, AND HYDRAULIC COMPOSITION

BABA NAOKI / NAITO HIROKI / SUGANUMA YUKI / TAMAKI SHINJI

To provide a shrinkage reducing agent for a hydraulic composition, capable of suppressing a change in an air content in a subsequent batch of the hydraulic composition while providing shrinkage reducing properties in a hardened body of a hydraulic composition such as mortar and concrete.SOLUTION: A shrinkage reducing agent for a hydraulic composition comprises, as its constituent units: a compound (A) represented by general formula (1); and a copolymer (B) containing a monomer having an anionic group and an unsaturated hydrocarbon monomer.SELECTED DRAWING: None

【課題】モルタルやコンクリートなどの水硬性組成物の硬化体における収縮低減性を付与しつつ、続くバッチの水硬性組成物における空気量の変化を抑制することができる水硬性組成物用収縮低減剤を提供する。【解決手段】一般式（１）で示される化合物（Ａ）と、アニオン性基を有する単量体及び不飽和炭化水素系単量体を構成単位として含む共重合体（Ｂ）と、を含有することを特徴とする水硬性組成物用収縮低減剤。【選択図】なし

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