Abstract In this work, a novel structure of phosphated superplasticizer (PNH) prepared by Mannich reaction of polyetheramine, phosphorous acid and formaldehyde was reported. Results of cement paste test indicated that PNH superplasticizer exhibits excellent fluidity retention and retarding properties. The PNH superplasticizer also showed better clay tolerance than polycarboxylate superplasticizer (PCE), as the slump flow decreased by 7.20% and 18.22% when 0.5% and 1.0% of montmorillonite were added respectively, while the slump flows of PCE superplasticizer decreased by 29.18% and 67.81% respectively. Adsorption isotherms and conductivity measurements indicated that phosphate group with two negative charges can coordinate with more Ca2+, which enables its complexation and adsorption capacity much stronger than carboxylic group. Setting time analysis and isothermal calorimetry measurements demonstrated that PNH superplasticizer using phosphate as adsorption group has an obvious retarding ability as it could delay hydration process and reduce hydration heat. Although the phosphated superplasticizers showed a lower dispersion ability, comparing with PCE superplasticizer, the special structure and properties provide the potential to explore new kind of superplasticizers in the future. Graphical Abstract

中文翻译：

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新型结构磷化减水剂的合成及性能

摘要 本文报道了一种由聚醚胺、亚磷酸和甲醛的曼尼希反应制备的新型磷酸化高效减水剂（PNH）结构。水泥浆试验结果表明，PNH高效减水剂表现出优异的流动性和缓凝性能。PNH 减水剂还表现出比聚羧酸减水剂 (PCE) 更好的耐粘土性，因为当添加 0.5% 和 1.0% 的蒙脱石时，坍落度流率分别下降了 7.20% 和 18.22%，而 PCE 减水剂的坍落流率下降了 29.18% 和 18.22%。分别为 67.81%。吸附等温线和电导率测量表明，带有两个负电荷的磷酸基团可以与更多的Ca2+配位，使其络合和吸附能力远强于羧基。凝结时间分析和等温量热测量表明，以磷酸盐为吸附基团的PNH高效减水剂具有明显的缓凝能力，可以延缓水化过程，降低水化热。尽管磷酸化减水剂的分散能力较低，但与PCE减水剂相比，其特殊的结构和性能为未来探索新型减水剂提供了潜力。图形概要 这种特殊的结构和性能为未来探索新型减水剂提供了潜力。图形概要 这种特殊的结构和性能为未来探索新型减水剂提供了潜力。图形概要