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Self-compacting concrete since its birth in the 1980s , because of its excellent performance has been very wide range of applications . Practical engineering , ease of construction , often than actually needed more liquidity , it will reduce the strength of the concrete , and will increase the cost . The reasons for this situation is that the concrete is a mixture of a variety of materials , various components affect its strength and performance , through testing, analysis can be carried out on the influence of various factors . However , the test is often time-consuming , and control of the test conditions is a tough job , often leads to the deviation of the test results . Numerical simulation method can well control the influencing factors , to study the role of a single factor for each component of the performance of self-compacting concrete . This article using commercial software FLOW-3D computational fluid dynamics to study the performance of self - compacting concrete work . Will be seen as self-compacting concrete mixture evenly single fluid , its constitutive relation Bingham model , rheological properties are controlled by the two parameters of the yield stress and plastic viscosity . By the slump test , the L - type instrument test and numerical simulation of the U- box test , and combined with the appropriate test to examine the water-cement ratio , sand ratio and superplasticizer three factors on the performance of self - compacting concrete work . By choosing a reasonable yield stress and plastic viscosity two rheological parameters , the numerical simulation results in good agreement with the experimental results . Also , numerical methods can also be the process of development of flow test describe intuitively , consider the components and test conditions (such as the influence of friction on the wall surface of the instrument , and the reinforced grid , etc. ) can be integrated on the working performance of . The comparative analysis of the numerical results with the experimental results can be found in the changes of the water -cement ratio , sand ratio , superplasticizer , and other factors will lead to the change of the performance of self-compacting concrete , rheological parameters and these factors also exist relationship . Numerical simulation can greatly reduce pilot workload and save manpower, material and financial resources , combined with the test , you can more easily study the performance of self-compacting concrete .
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