In this study, the influence of aluminum nitrate on the hydration process of magnesium potassium phosphate (MKP) cement was investigated experimentally and through thermodynamic modelling using diluted systems with Mg/PO₄ molar ratio and water-to-cement ratio of 1 and 100 respectively. Three processes contributed to retard cement hydration: the acidic nature of aluminum nitrate which reduced the initial pH of the solution by two units, the early precipitation of a taranakite-like amorphous potassium aluminophosphate, which reduced the aqueous phosphate and potassium concentrations, and a salt effect due to the presence of soluble nitrate. Precipitation of potassium-containing magnesium phosphate hydrates, like Mg₂KH(PO₄)₂⋅15H₂O and K-struvite, was prohibited, whereas precipitation of newberyite and cattiite was delayed. Furthermore, the modelled phase development with ongoing cement hydration agreed rather well with the experimental findings.

在本研究中，使用 Mg/PO ₄摩尔比和水灰比分别为 1 和 100 的稀释体​​系，通过实验和热力学模型研究了硝酸铝对磷酸镁钾 (MKP) 水泥水化过程的影响. 三个过程有助于延缓水泥水化：硝酸铝的酸性使溶液的初始 pH 值降低两个单位，早期沉淀类似塔拉纳克石的无定形磷酸铝钾，降低了磷酸盐和钾的浓度，以及盐由于可溶性硝酸盐的存在。含钾磷酸镁水合物的沉淀，如 Mg ₂ KH(PO ₄ ) ₂ ⋅15H₂ O 和 K-鸟粪石被禁止，而新辉石和钙钛矿的沉淀被延迟。此外，模拟的水泥水化相发展与实验结果非常吻合。