High-ductility magnesium phosphate cement-based rapid repairing material and preparation method thereof

The invention relates to the field of novel building materials, in particular to a high-ductility magnesium phosphate cement-based rapid repairing material and a preparation method thereof. The rapid repairing material is prepared from the following raw materials in parts by mass: 330 to 893 parts of magnesium oxide, 99 to 372 parts of ammonium dihydrogen phosphate, 82 to 360 parts of retarder, 124 to 744 parts of fly ash, 248 to 496 parts of fine aggregate, 153 to 440 parts of water and 13 to 26 parts of fiber. The high-ductility magnesium phosphate cement-based rapid repair material prepared by the invention integrates rapid hardening, high strength and high ductility, obviously improves the defects of poor tensile deformation resistance and the like of common magnesium phosphate cement, can be used in the field of rapid repair of road and bridge deck concrete pavement layers, reduces traffic blocking time, opens traffic as soon as possible, and improves the repair efficiency. And moreover, the cracking ris