矿物掺合料对磷酸镁水泥性能影响及机理研究现状

磷酸镁水泥(MPC)，具有快硬、早强等优点，应用于道路抢修、重金属固化等领域，但其存在凝结时间过快、耐久性差等缺陷。通过矿物掺合料对MPC进行改性，延缓其凝结时间、改善其耐久性的同时，实现了工业废渣的循环再利用。本工作综述了粉煤灰、矿渣、偏高岭土、硅灰等矿物掺合料对MPC流动度、凝结时间、力学性能、耐久性的影响，并对矿物掺合料改性磷酸镁水泥的机理进行了分析探讨。鉴于目前矿物掺合料改性磷酸镁水泥研究中存在的问题，并结合实际应用需求，对MPC改性研究及其发展方向进行了展望，为矿物掺合料改性MPC研究提供相关依据。

Research status of mineral admixtures on properties and mechanism of magnesium phosphate cement

Magnesium phosphate cement (MPC), a new kind of inorganic cementing material, has some special performances such as rapid setting, fast hardening, and low drying shrinkage, etc. It has been widely used in the fields of repair and rehabilitation of civil structures, dental and bone restoration, stabilization of toxic matter or radioactive waste and treatment of wastewater. However, MPC faces some challenges, including high cost, potentially high energy consumption and high heat releasing, etc. For the sustainable development of MPC, it is urgent to address the above problems. In MPC system, the addition of mineral admixtures can not only decrease the preparation cost, but also greatly improve the setting behavior, mechanical properties, water resistance, etc. Based on various research documents on MPC and mineral admixtures, the influence of mineral admixtures such as fly ash, slag, metakaolin and silica fume on the fluidity, setting time, mechanical properties and durability of MPC were discussed. Then, the modification mechanism of MPC with mineral admixtures was also summarized. Finally, the advantages and disadvantages of MPC modified by mineral admixtures were pointed out, and the research direction of MPC modification was prospected according to the actual application requirements.