摘   要：为了利用聚甲醛（POM）纤维的性能优势，并促进其在纤维混凝土领域的推广与应用，研究了POM纤维和PP纤维对混凝土新拌性能、塑性抗开裂性能、力学性能、体积稳定性和耐久性能的影响规律。结果表明，掺入POM纤维虽降低了混凝土的新拌性能、抗压强度和干燥收缩变形，但却有效提高了砂浆的塑性抗开裂能力、混凝土的劈裂抗拉强度和耐久性能。与PP纤维相比，当POM纤维和PP纤维的掺量相同时，掺加POM纤维的混凝土具有更为优异的新拌性能、塑性抗开裂能力、抗压强度、劈裂抗拉强度、抗氯离子渗透性能、抗碳化能力和抗冻性能。
Abstract: In order to use the advantages of polyoxymethylene (POM) fiber and promote its application in the field of fiber reinforced concrete, the effects of POM fiber and polypropylene (PP) fiber on the workability, anti-plastic-cracking property, mechanical performance, volume stability and durability of concrete are  investigated. The experimental results showed that the inclusion of POM fiber can reduce the workability, compressive strength and drying shrinkage of concrete, but can improve the anti-plastic-cracking property, split tensile strength and durability of concrete. Compared to PP fiber, POM fiber reinforced concrete has better workability, anti-plastic-cracking capacity, compressive strength, split tensile strength and resistance to chloride ion permeability, carbonation and frost when the content of POM and PP fiber are the same.