Magnesia (MgO) Production and Characterization, and Its Influence on the Performance of Cementitious Materials: A Review.
Magnesia (MgO) Production and Characterization, and Its Influence on the Performance of Cementitious Materials: A Review.
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DOI：
10.3390/ma13214752
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发表时间：
2020-10-23
期刊：
影响因子：
--
通讯作者：
Jorge B
中科院分区：
文献类型：
--
作者：
José N;Ahmed H;Miguel B;Luís E;Jorge B
本文综述了氧化镁的特性及其在胶凝材料中的应用。它从MgO的生产工艺、煅烧温度、反应性和物理性质的表征开始。建立了不同MgO特性之间的关系。研究了MgO掺入量对胶凝材料性能的影响。本文讨论了用氧化镁配制的水泥净浆、砂浆和混凝土混合料的力学强度和耐久性。MgO-水泥混合物的研究性能包括抗压强度、抗折强度、抗拉强度、弹性模量、吸水率、孔隙率、碳化、氯离子渗透、收缩、膨胀和水化程度。此外，MgO水泥混合物的微观分析也进行了评估。总结不同研究的结果，可以得出结论，MgO掺入胶凝材料的机械强度和收缩，并增加孔隙率，膨胀，碳化和氯离子迁移。然而，应该强调的是，所使用的特定MgO的性质（主要是煅烧温度、反应性和表面积）对所生产的胶凝材料的特性具有显著影响。
This paper presents a literature review concerning the characteristics of MgO (magnesium oxide or magnesia) and its application in cementitious materials. It starts with the characterization of MgO in terms of production processes, calcination temperatures, reactivity, and physical properties. Relationships between different MgO characteristics are established. Then, the influence of MgO incorporation on the properties of cementitious materials is investigated. The mechanical strength and durability behaviour of cement pastes, mortars and concrete mixes made with MgO are discussed. The studied properties of MgO–cement mixes include compressive strength, flexural strength, tensile strength, modulus of elasticity, water absorption, porosity, carbonation, chloride ion penetration, shrinkage, expansion, and hydration degree. In addition, microscopic analyses of MgO-cement mixes are also assessed. Summarizing the results of different studies, it is concluded that MgO incorporation in cementitious materials generally decreases the mechanical strength and shrinkage, and increases the porosity, expansion, carbonation and chloride ion migration. However, it should be emphasized that the properties of the specific MgO used (mainly the calcination temperature, the reactivity and the surface area) have a significant influence on the characteristics of the cementitious materials produced.
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影响因子：
3.4
作者：
Back, Martin;Bauer, Markus;Peiffer, Stefan
通讯作者：
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影响因子：
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作者：
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DOI：
10.3390/ma7086010
发表时间：
2014-08-21
期刊：
Materials (Basel, Switzerland)
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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作者：
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