Influence of mixing solution on characteristics of calcium aluminate cement modified with sodium polyphosphate
Influence of mixing solution on characteristics of calcium aluminate cement modified with sodium polyphosphate
复制标题
DOI：
10.1016/j.cemconres.2019.105951
复制
发表时间：
2020-02-01
影响因子：
11.4
通讯作者：
Kinoshita, Hajime
中科院分区：
文献类型：
--
作者：
Irisawa, Keita;Garcia-Lodeiro, Ines;Kinoshita, Hajime
本研究通过改变聚磷酸钠混合溶液的量和浓度，研究了磷酸盐改性铝酸钙水泥（CAP）的特性。当增加混合溶液的量而聚磷酸钠的量恒定时，与铝酸钙水泥中的钙黄长石相比，观察到铝酸一钙的消耗增加。三水铝石 Al(OH)(3) 的形成也作为 CAP 中的水合产物而增加，并且无定形凝胶相中的水减少。当多聚磷酸钠浓度恒定的情况下增加混合溶液的量时，没有观察到铝酸一钙的消耗增加。该系列中未发现三水铝石或任何其他结晶水合产物。另外，未反应的聚磷酸钠残留在系统中。三水铝石形成的增加以及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。
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.