Incorporating polyoxymethylene(POM)fibers into concrete,by designing ordinary concrete and POM fiber concrete with strength grades of C25 to C50,the study investigates the impact of POM fibers on the mixing properties,impact resistance,permeability resistance,freeze-thaw resistance,and compressive strength of concrete with different strength grades.The results indicate that the incorporation of POM fibers has negligible impact on the workability of the concrete mix.The addition of POM fibers significantly enhances the abrasion resistance of concrete,with the highest increase observed in C50 concrete,reaching 142.5％.The inclusion of POM fibers does not affect the permeability grade of concrete,but it does increase the average height of water penetration.After 200 freeze-thaw cycles,the mass loss of POM fiber-reinforced concrete specimens is notably improved,indicating that POM fibers can enhance the toughness and crack resistance of concrete,effectively mitigating the damage caused by freeze expansion.Incorporating POM fibers can enhance the compressive strength of concrete,with the most significant effect observed in C40 concrete,where the 7,28 d compressive strengths are increased by 8％,10％,respectively,compared to ordinary concrete.
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