Dynamic Properties of Magnesium Oxychloride-Titanium Gypsum Mineral Material after Freeze-thaw Cycles

(TG) composite material is a new type of green and energy-saving
material. To reveal the uniaxial compressive strength and impact
dynamic properties of MOC-TG composite material after multiple
freeze-thaw cycles, an electromagnetic-driven Hopkinson bar
impact test and a microcomputer-controlled electro-hydraulic servo
universal testing machine were used to analyze the strength
variation characteristics of MOC composite material with 30% TG
after 0, 10, 20, 30, and 40 freeze-thaw cycles. Results show that
with the increase in the number of freeze-thaw cycles, both the
dynamic impact strength and uniaxial compressive strength of the
MOC-TG composite material first increase and then decrease. The
ductility of MOC is significantly improved after the addition of TG,
and the MOC-TG composite material exhibits good frost resistance.
The conclusions obtained in this study can provide a reference for
improving the frost-thaw damage resistance of MOC-TG and its
strength characteristics after multiple freeze-thaw cycles.