采用粉煤灰、聚丙烯颗粒改性混凝土，探究了单掺和复掺粉煤灰和塑料颗粒废料对混凝土力学和耐久性能的影响。结果表明：适量单掺粉煤灰对晚期混凝土的力学性能没有明显影响，适量掺入粉煤灰会改善混凝土晚期的耐久性能。单掺聚丙烯塑料颗粒降低了混凝土的力学性能、耐久性能。适量复掺粉煤灰和聚丙烯颗粒可以有效改善混凝土晚期的力学性能和耐久性能。复掺体系中，总掺量在30%的情况下，粉煤灰和聚丙烯颗粒的质量比为1∶1时，混凝土的力学性能和耐久性能等综合性能较优。

The effects of single and compound fly ash and plastic waste on the mechanics and durability of concrete modified with fly ash and polypropylene particles are studied. The results show that the appropriate amount of fly ash has no obvious effect on the mechanical properties of concrete at late age, and the appropriate amount of fly ash can improve the durability of concrete at late age. Single-doped polypropylene plastic particles reduce the mechanical properties and durability of concrete. The mechanical properties and durability of concrete in the late stage can be effectively improved by adding fly ash and polypropylene particles in appropriate amount. When the mass ratio of fly ash and polypropylene particles is 1∶1, the mechanical properties and durability of concrete are better under the condition that the total content is 30%.