针对聚丙烯粗合成纤维与水泥基体界面粘结性能差的问题，采用聚丙烯酰胺溶液对其进行浸泡处理，并通过纤维拔出试验、显微硬度测试、X 射线衍射分析和扫描电镜分析等，分析了聚丙烯酰胺对粗合成纤维/基体界面性能的影响． 结果表明:经聚丙烯酰胺处理后，纤维/基体界面粘结性能提高，纤维拔出曲线更为饱满，脱粘现象延后，并且随着聚丙烯酰胺处理液中聚丙烯酰胺含量的增大，其效果更为明显;处理后的界面区 CH 晶体减少，界面显微硬度增大，过渡层厚度变薄，CH、C-S-H 和 AFt 交织生长，水化产物结构致密度提高，纤维与水泥基体界面薄弱区明显得到改善．

In order to overcome the poor bond performance of macro-synthetic polypropylene fiber/cement matrix，macro-synthetic polypropylene fiber was soaked in polyacrylamide solution，and fiber pullout test，microhardness test，X-ray diffraction analysis and scanning electron microscopy analysis were subsequently carried out to evaluate the effect of polyacrylamide on the interfacial properties of fiber/cement matrix． The results show that fiber/matrix interfacial bond properties improve due to the treatment with polyacrylamide solution; for instance，the fiber pullout curve becomes fuller and the interfacial debond postpones． Moreover，significant improvement can be observed with the increase of polyacrylamide content in the solution． It is also found from microanalysis that the treatment results in a decrease of CH crystal in the interfacial region，an increase of interface microhardness，a thinner transition lay-er as well as a densified hydration products structure with alternate CH，C-S-H and AFt． Thus，the weak area be-tween the fiber and the cement matrix improves significantly．