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首页> 外文期刊>Cement & concrete composites >DEM simulation of SCC flow in L-Box set-up: Influence of coarse aggregate shape on SCC flowability
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DEM simulation of SCC flow in L-Box set-up: Influence of coarse aggregate shape on SCC flowability

机译：L字框设置中SCC流动的DEM仿真：粗骨料形状对SCC流动性的影响

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摘要

Coarse aggregate are one of the main components of self-compacting concrete (SCC) and the size, shape, and grading of coarse aggregate can lead to different characteristics of SCC. In this paper, the effect of needle-shaped coarse aggregate on SCC flowability is systematically investigated and presented. A new method is proposed to randomly generate SCC with arbitrary aggregate shape and grading. Aggregate shapes are determined and classified by calculating the shape descriptors of aggregate, and thereby, SCC meeting the calculation requirements is generated. Based on this new method of aggregate generation, the discrete element method (DEM) is used to simulate the SCC flow process in L-box test. By continuously adjusting the content of needle-shaped coarse aggregate, the impact of coarse aggregate shape on the SCC flowability is evaluated, and the acceptable range of needle-shaped coarse aggregate content is obtained, which has guiding significance for the actual selection of concrete coarse aggregate.
机译：粗骨料是自压力混凝土（SCC）的主要部件之一，粗骨料的尺寸，形状和分级可以导致SCC的不同特性。在本文中，系统地研究和呈现针状粗骨料对SCC流动性的影响。提出一种新方法以随机生成SCC，具有任意聚集形状和分级。通过计算聚合的形状描述符，从而确定聚合形状，从而生成SCC，SCC会出现计算要求。基于这种聚合生成的新方法，离散元素方法（DEM）用于模拟L字框测试中的SCC流程。通过连续调节针形粗骨料的含量，评估粗骨料形状对SCC流动性的影响，获得可接受的针状粗骨料含量，这对于实际选择混凝土粗的指导意义总计的。

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