Abstract: An experimental investigation into the compressive strength, the flexural strength and the water resistance of magnesium phosphate cement (MPC) mortar reinforced by glass fiber was conducted. Four fiber volume fractions of 1.5%, 2.5%, 3%, 3.5% were designed for the experiments. The microstructure, mechanical and water resistance properties of fiber-reinforced MPCs were evaluated with respect to the variance in the fiber volume fraction. The results showed that the glass fibers had more pronounced effects on the flexural strength compared to compressive strength. The optimum volume fraction of glass fiber was reported at 2.5%. Furthermore, the effect of glass fiber on the water resistance of MPC was discussed, and a “reserving” method to resist the strength loss by water was provided. In addition, a possible explanation of the fiber reinforcement mechanism which is in agreement with the experimental results was proposed.
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2017, Vol. 31 
