Chen Aijiu, Han Xiaoyan, Wang Zhihao, Guo Tengteng
School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhenzhou 450045, China.
School of Water Conservancy, North China University of Water Resources and Electric Power, Zhenzhou 450045, China.
Materials (Basel). 2021 Apr 24;14(9):2183. doi: 10.3390/ma14092183.
Recycling scrap tyres as alternative aggregates of concrete is an innovative option. To clarify the dynamic properties of the pretreated rubberized concrete with some cumulative damage, the natural frequency, flexural dynamic stiffness, and damping ratio of the specimens under incremental stress level were investigated in this paper. The results indicated that the pretreatment of rubber particles improved the strength, ductility, and crack resistance of the rubberized concrete. The reduction of the flexural dynamic stiffness was clarified with the increase of concrete stress level. The addition of the pretreated rubber particles enhanced the concrete energy dissipation capacity during the destruction, and the specimen dissipated more energy with the increase of rubber content before its failure.
将废旧轮胎作为混凝土的替代骨料进行回收利用是一种创新选择。为了阐明具有一定累积损伤的预处理橡胶混凝土的动力特性，本文研究了在增量应力水平下试件的固有频率、弯曲动刚度和阻尼比。结果表明，橡胶颗粒的预处理提高了橡胶混凝土的强度、延性和抗裂性。随着混凝土应力水平的提高，弯曲动刚度降低。添加预处理橡胶颗粒提高了混凝土破坏过程中的能量耗散能力，试件在破坏前随着橡胶含量的增加耗散更多能量。
