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Axi-symmetric simulation of the slump flow test for self-compacting concrete

机译:自密实混凝土坍落度试验的轴对称模拟

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One of the main obstacles for further development of self-compacting concrete (SCC) is to relate the fresh concrete properties, form geometry, reinforcement configuration, and casting technique to the form filling ability. Simulation of the filling ability might provide a tool in obtaining this goal. For simulation according to a continuum mechanical approach, the rheological properties are required. However, in connection with on-site jobs, it is only possible to characterise the flow properties or workability according to simple empirical test methods, and among the most popular is the slump flow test. This paper presents a numerical axi-symmetric approach for simulation of the slump flow test. Simulations are compared to experimental test results on the rheological properties and slump flow. Former rheological investigations on SCC indicate a non-Newtonian behaviour according to the Bingham model.
机译:自密实混凝土(SCC)进一步发展的主要障碍之一是将新拌混凝土的性能,模板的几何形状,配筋配置和浇筑技术与模板的填充能力相关联。填充能力的仿真可能会提供实现此目标的工具。为了根据连续机械方法进行仿真,需要流变性能。但是,对于现场作业,只能根据简单的经验测试方法来表征流动特性或可加工性,其中最流行的是坍落流动测试。本文提出了一种数值轴对称方法来模拟坍落度流动试验。将模拟与流变特性和坍落度的实验测试结果进行比较。根据Bingham模型,以前对SCC进行的流变研究表明存在非牛顿行为。

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