Research Progress on Fiber Reinforced Magnesium Phosphate Cement Composites
YANG Zhenghong1,2, LIU Sijia2, WU Kai1,2, YU Long1,2,*, PAN Feng3
1 Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education, Shanghai 201804, China 2 School of Materials Science and Engineering, Tongji University, Shanghai 201804, China 3 Shanghai Construction No. 5(Group) Co., Ltd., Shanghai 200063, China
Abstract: Magnesium phosphate cement(MPC) is a new kind of inorganic cementitious material formed by through-solution acid-based reactions between dead-burned magnesium oxide and soluble phosphate with high strength at an early stage. MPC has the advantages of rapid strength development, low alkalinity and superior adhesive strength. However, due to the microstructure and crystal phases volume fraction, MPC is typically brittle and easy to crack, which greatly limits its application. Fiber reinforced magnesium phosphate cement composites(FRMPC), which enhances toughness through fiber reinforcement, has attracted much attention. In this paper, the compressive, tensile and flexural strength of FRMPC are systematically introduced. Combining with the characteristics of hydrated MPC, the toughening mechanism of fiber through bridging and interface action is analyzed. The main application methods of FRMPC are summarized. Based on recent research progress of fiber reinforced cement-based composites, this review also puts forward the development trend of FRMPC in proportion design, testing method and mechanism research.
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