通过聚丙烯纤维混凝土和砂浆早期塑性收缩性能试验 ,研究不同含量、不同长度的聚丙烯纤维对混凝土和砂浆早期塑性收缩性能的影响 .试验结果表明 ,短切乱向分布的聚丙烯纤维掺入混凝土和砂浆后 ,可以减少混凝土和砂浆浇筑后的水分散失 ,并有效控制混凝土和砂浆早期塑性收缩裂缝的发生 ,是提高混凝土和砂浆耐久性的有效途径之一 The influence of different content and different length of polypropylene fiber on the early plastic shrinkage of concrete and mortar was studied by polypropylene fiber concrete and early plastic shrinkage test of the mortar.The results showed that the short- And mortar can reduce the water loss after concrete and mortar pouring, and effectively control the early plastic shrinkage cracks of concrete and mortar, which is an effective way to improve the durability of concrete and mortar