聚脲颗粒混凝土静动态力学性能

Static and Dynamic Mechanical Properties of Polyurea Particle Concrete

摘要:

本文探究聚脲颗粒掺量、聚脲颗粒粒径对混凝土静动态力学性能的影响，设置橡胶颗粒混凝土和普通混凝土为对照组，对试件进行准静态抗压试验、静态抗折试验以及动态抗冲击试验。结果表明：聚脲颗粒混凝土抗压强度明显高于橡胶颗粒混凝土；聚脲颗粒的掺入能明显提高混凝土的韧性；当颗粒掺量为10%时，峰值应变集中在4‰-6‰之间，这时聚脲颗粒混凝土具有更佳的韧性和延展性；颗粒粒径为1-3mm的聚脲颗粒混凝土展现出较为优异的耗能特性。。

Abstract:

This article explores the effects of polyurea particle content and particle size on the static and dynamic mechanical properties of concrete. Rubber particle concrete and ordinary concrete are set as control groups, and quasi-static compressive tests, static bending tests, and dynamic impact tests are conducted on the test specimens. The results show that the compressive strength of polyurea particle concrete is significantly higher than that of rubber particle concrete; the incorporation of polyurea particles can significantly improve the toughness of concrete; when the particle content is 10%, the peak strain is concentrated between 4‰ and 6‰, at which point polyurea particle concrete exhibits better toughness and ductility; polyurea particle concrete with a particle size of 1-3mm exhibits superior energy dissipation characteristics.