EXPERIMENTAL EVALUATION OF MECHANICAL PROPERTIES OF MPC AS REPAIR MATERIAL OF BALLASTLESS TRACK BASE PLATE
In this research,magnesium phosphate cement(MPC)is treated as maintenance material to study the effect of repair thickness(20 mm,35 mm,50 mm)on the mechanical properties of the composite members ac-cording to the different damage degree of the base slab concrete of ballastless track of high-speed railway.The test results show that when the repair thickness is 20 mm,the ultimate bearing capacity of 2 h reaches 87.57%of the bearing capacity of the whole cast-in-place member.With the increase of the repair thickness,the ultimate bearing capacity of the composite member gradually decreases.When the repair thickness is 50 mm,the ultimate bearing capacity of the composite member decreases by 16.64%compared with that of the composite member with the re-pair thickness of 20 mm.At the same time,through the numerical simulation results,the numerical outcomes are in accordance with the experiment results.
magnesium phosphate cementmaintenance materialmechanical propertyfinite element software
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