Blocking Mechanism Study of Self-Compacting Concrete Based on Discrete Element Method

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Zhang, Xuan^1 ; Li, Zhida^1 ; Zhang, Zhihua^1

School of Transportation, Wuhan University of Technology, Wuhan

430063, China^1

关键词: Blocking mechanisms;    Channel sections;    Correction coefficients;    Discrete element modeling;    Filling capacity;    Particle simulations;    Passing ability;    Self compactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012090/pdf
DOI  :  10.1088/1757-899X/269/1/012090

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to study the influence factors of blocking mechanism of Self-Compaction Concrete (SCC), Roussel's granular blocking model was verified and extended by establishing the discrete element model of SCC. The influence of different parameters on the filling capacity and blocking mechanism of SCC were also investigated. The results showed that: it was feasible to simulate the blocking mechanism of SCC by using Discrete Element Method (DEM). The passing ability of pebble aggregate was superior to the gravel aggregate and the passing ability of hexahedron particles was bigger than tetrahedron particles, while the tetrahedron particle simulation results were closer to the actual situation. The flow of SCC as another significant factor affected the passing ability that with the flow increased, the passing ability increased. The correction coefficient λ of the steel arrangement (channel section shape) and flow rate γ in the block model were introduced that the value of λ was 0.90-0.95 and the maximum casting rate was 7.8 L/min.