To explore the impact of cyclic compression on fatigue damage in concrete with varying iron tailings sand content,we conducted mixture performance assessments and variable-amplitude cyclic compression tests on iron tailings sand concrete.Our findings reveal that the water absorption of iron tailings sand concrete surpasses that of ordinary concrete,escalating with dosage increments.Below a 40％iron tailings sand content,concrete exhibits en-hanced fluidity and maintains a pumpable state in terms of pressure bleeding rate.The stress-strain curve of iron tailings sand concrete during cyclic compression transitions from dense to sparse,with deformation levels lower than those of ordinary concrete.Near failure,the loading deformation modulus experiences a sudden decline.Total input energy and elastic strain energy exhibit accelerated growth rates with increasing cyclic compression times,while dis-sipation energy shows a gradual increase followed by a rapid surge.
关键词
铁尾矿砂/混凝土/拌合物性能/变幅循环压缩
Key words
iron tailings sand/concrete/mixture performance/variable-amplitude cyclic compression
维普
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