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过程工程学报 ›› 2021, Vol. 21 ›› Issue (6): 629-638.DOI: 10.12034/j.issn.1009-606X.220157

• 综述 • 上一篇    下一篇

矿物掺合料对磷酸镁水泥性能影响及机理研究现状

马越1,周新涛1,黄静2,罗中秋1*,符义忠1,母维宏1,王路星1,邵周军1   

  1. 1. 昆明理工大学化学工程学院,云南 昆明 650500 2. 西昌学院,四川 西昌 615000
  • 收稿日期:2020-05-21 修回日期:2020-07-11 出版日期:2021-06-28 发布日期:2021-06-28
  • 通讯作者: 罗中秋 luozhongq@yeah.net
  • 基金资助:
    国家自然科学基金地区基金;国家自然科学基金地区基金

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

Yue MA1, Xintao ZHOU1, Jing HUANG2, Zhongqiu LUO1*, Yizhong FU1, Weihong MU1, Luxing WANG1, Zhoujun SHAO1   

  1. 1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China 2. Xichang University, Xichang, Sichuan 615000, China
  • Received:2020-05-21 Revised:2020-07-11 Online:2021-06-28 Published:2021-06-28

摘要: 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。

关键词: 磷酸镁水泥, 矿物掺合料, 可操作性, 力学性能, 耐久性, 改性机理

Abstract: 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.

Key words: magnesium phosphate cement, mineral admixtures, operability, mechanical properties, durability, modification mechanism