Study on flexural resistance and hydration mechanism of magnesium phosphate cement

Based on a large number of research data at home and abroad, this paper designed an experiment to complete the research on the mechanical properties and durability of magnesium phosphate cement by the ratio of magnesium phosphorus, fly ash content and pH value. On this basis, the effects of curing methods and different concentrations of hydrochloric acid on hydration products of magnesium phosphate cement were studied, and the mechanism of action was analyzed. Finally, when the M/P ratio was 4, with the increase of curing time, the strength of MPC increases gradually. When M/P is greater than 4, the flexural strength of MPC all shows a certain degree of shrinkage. In addition, fly ash can reduce the shrinkage of magnesium phosphate cement-based materials; The content of K-type struvite (KM g PO 4 ꞏ6H 2 O) in MPC can be increased under acid curing (pH=2) and water curing conditions.