Research Progress of Magnesium Phosphate Cement Repair Material

Magnesium phosphate cement (MPC) is produced by the hydration reaction of magnesium oxide and phosphate, which is a new type of cementitious material combined by chemical bonding, and has a short setting time and high early strength while reducing the amount of CO2 emission, and has a broad prospect in the airport runway, tunnels, mines, and other civil buildings and national defense projects such as emergency repair. However, the hydration speed of magnesium phosphate cement is extremely fast, and the setting time is very short, resulting in some engineering construction can not be carried out. In view of the problems demanded by magnesium phosphate cement in engineering applications, the preparation and hydration process of magnesium phosphate cement was studied by using the method of literature review, focusing on the research of setting time, mechanical properties, durability and volume stability of magnesium phosphate cement, and the related problems were reviewed and discussed.