Magnesium Phosphate Cement Properties and Applications
Summary
Magnesium phosphate cements (MPCs) encompass a class of chemically bonded materials formed by the acid–base reaction between magnesium oxide or hydroxide and phosphate sources such as potassium dihydrogen phosphate. These cements rapidly develop high early strength, low permeability and strong adhesion to a variety of substrates, making them particularly suited to rapid repair of infrastructure, road maintenance and specialised civil applications. The principal binder phase, struvite-K, imparts a dense microstructure with reduced capillary porosity, while the chemistry can be tuned through the choice of additives, retarders and fillers to control setting time, mechanical performance and durability. Beyond conventional repair uses, MPC formulations have been explored for immobilisation of hazardous and radioactive waste, bone cements in biomedical engineering and eco-friendly composites. The versatility of MPCs derives from their adjustable hydration dynamics, compatibility with supplementary materials such as fly ash and slag, and resilience under aggressive environmental conditions including elevated temperatures and aqueous immersion.
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Magnesium Phosphate Cement Properties and Applications publication trend
The graph below shows the total number of articles in magnesium phosphate cement properties and applications across all publications each year (not limited to Nature Index journals).
Technical terms
Struvite-K: Magnesium potassium phosphate hexahydrate (MgKPO4·6H2O), the principal crystalline binder phase in MPCs.
Hydration: The chemical process by which phosphate and magnesium sources react to form cementitious products, releasing or absorbing heat.
Molar ratio (M/P): The proportion of magnesium to phosphate ions, a key parameter governing reaction kinetics and phase assemblages.
Porosity: The volume fraction of void spaces within the hardened cement, influencing mechanical strength and transport properties.
Efflorescence: The deposition of soluble salts on the surface during drying, which can be mitigated by cement chemistry adjustments.
References
- Magnesia-Based Cements: A Journey of 150 Years, and Cements for the Future?. Chemical Reviews (2016).
- Characterisation of magnesium potassium phosphate cements blended with fly ash and ground granulated blast furnace slag. Cement and Concrete Research (2015).
- Fractal Analysis on Pore Structure and Modeling of Hydration of Magnesium Phosphate Cement Paste. Fractal and Fractional (2022).
- Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of Concrete. Advances in Materials Science and Engineering (2016).
- Early age hydration and application of blended magnesium potassium phosphate cements for reduced corrosion of reactive metals. Cement and Concrete Research (2021).
- Preparation and characterization of a degradable magnesium phosphate bone cement. Regenerative Biomaterials (2016).
- Study on an Improved Phosphate Cement Binder for the Development of Fiber-Reinforced Inorganic Polymer Composites. Polymers (2014).
- Characterization of and Structural Insight into Struvite-K, MgKPO4·6H2O, an Analogue of Struvite. Inorganic Chemistry (2020).
- Influence of aluminum sulfate on properties and hydration of magnesium potassium phosphate cements. Cement and Concrete Research (2022).
- Magnesium Potassium Phosphate Compound for Immobilization of Radioactive Waste Containing Actinide and Rare Earth Elements. Materials (2018).
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