Abstract The mixing solution of wollastonite-based brushite cement is a phosphoric acid solution containing metallic cations and borax. This work complements a previous study devoted to the influence of the H3PO4 concentration, Ca/P and liquid-to-solid (l/s) ratios on the setting and hardening process of the binder by providing new insight into the role of aluminum and boron. Boron retards the setting and decreases the heat released during the process. It also contributes to reduce the macroporosity of the hardened material but yields to poor compressive strength. With aluminum in the mixing solution, the mechanical properties are greatly improved thanks to the precipitation of an amorphous aluminophosphate which increases the density of the cement matrix. But aluminum alone leads to fast setting. A joint addition of boron and aluminum to the mixing solution makes it possible to get a material with optimized properties both in fresh and hardened states.

中文翻译：

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了解硅灰石基透钙磷石水泥的凝结硬化过程。第 2 部分：混合溶液中硼和铝浓度的影响

摘要 硅灰石基透钙磷石水泥的混合溶液是一种含有金属阳离子和硼砂的磷酸溶液。这项工作通过对铝和硼的作用提供新的见解，补充了先前的研究，该研究致力于 H3PO4 浓度、Ca/P 和液固 (l/s) 比对粘合剂凝固和硬化过程的影响. 硼延缓凝固并减少过程中释放的热量。它还有助于降低硬化材料的大孔隙率，但会导致抗压强度较差。在混合溶液中加入铝，由于无定形铝磷酸盐的沉淀增加了水泥基体的密度，机械性能大大提高。但铝本身会导致快速凝固。