通过聚丙烯纤维砂浆收缩实验,研究了砂的粗度、灰砂比、聚丙烯纤维特性等对纤维水泥砂浆塑性收缩性能的影响。结果表明,砂细度模数越大,灰砂比越低,在保证施工性前提下适当增加纤维体积掺量,增加纤维的长径比,水泥砂浆抗裂性能越好。 Through the shrinkage experiment of polypropylene fiber mortar, the effects of sand thickness, sand-sand ratio and polypropylene fiber properties on the plastic shrinkage of fiber cement mortar were studied. The results show that the larger the module of sand fineness is, the lower the ratio of sand to sand is, and the volumetric content of fiber is appropriately increased under the premise of ensuring the workability. The longer the aspect ratio of the fiber, the better the crack resistance of cement mortar.