外力离析对C60自密实混凝土性能的影响

Effect of External Segregation on the Properties of C60 Self-Compacting Concrete

外力离析会导致自密实混凝土的粗骨料体积含量发生显著改变。通过调整C60自密实混凝土的粗骨料体积含量,模拟不同程度外力离析后的拌合物,研究其关键性能变化规律。研究结果表明,骨料体积含量的变化不仅会对自密实混凝土的流动性与强度产生负面影响,同时还会因其体积稳定性差异而导致开裂风险。

Concrete disintegration caused by external force may change the content of coarse aggregate significantly.In this paper,the coarse aggregate content of C60 self-compacting concrete was adjusted to simulate the concrete mixtures with different degrees of disintegration caused by external force.And the key properties of these mixtures were studied.The study shows that the content of coarse aggregate not only affects the fluidity and strength of the self-compacting concrete negatively,but also increases the cracking risk due to the discrepancy of volume stability.Also,root cause and hazard in practical engineering of concrete disintegration caused by external force were analyzed in this paper.