Abstract This study investigated characteristics of a calcium aluminate cement modified with a phosphate (CAP) by changing an amount and concentration of mixing solution with sodium polyphosphate. When the amount of mixing solution was increased with a constant amount of sodium polyphosphate, an enhanced consumption of monocalcium aluminate was observed compared with gehlenite in calcium aluminate cement. Formation of gibbsite, Al(OH)3, was also increased as a hydration product in the CAP and a reduction of water in the amorphous gel phase. When the amount of mixing solution was increased with a constant concentration of sodium polyphosphate, the enhanced consumption of monocalcium aluminate was not observed. Neither gibbsite nor any other crystalline hydration products were identified in this series. In addition, unreacted sodium polyphosphate remained in the system. The increased formation of gibbsite and the possible reduction of water from the amorphous gel phase appears to contribute to the improvement of the microstructure in the products.

中文翻译：

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混合液对聚磷酸钠改性铝酸钙水泥特性的影响

摘要 本研究通过改变与多聚磷酸钠混合溶液的量和浓度，研究了用磷酸盐 (CAP) 改性的铝酸钙水泥的特性。当混合溶液的量与恒定量的多磷酸钠一起增加时，与铝酸钙水泥中的钙黄长石相比，观察到铝酸一钙的消耗量增加。三水铝石Al(OH)3 的形成也作为CAP 中的水合产物和无定形凝胶相中水的减少而增加。当多聚磷酸钠浓度恒定而增加混合溶液量时，未观察到铝酸一钙消耗量的增加。在该系列中未发现三水铝石或任何其他结晶水合产物。此外，未反应的多聚磷酸钠留在系统中。三水铝石形成的增加和无定形凝胶相中水的可能减少似乎有助于改善产品的微观结构。