Research On Regeneration Performance Of Self-compacting Concrete Filled Steel Tube Used In Rocking Column

Self compacting concrete without vibration can realize dense reinforcement under its own weight, which can meet the needs of the construction of concrete filled steel tube not vibrating, such as marine platform swing structure. Demolition of buildings and failure, will produce construction waste, construction waste recycling on the formation of recycled aggregate, high performance of recycled aggregate of recycled concrete, is conducive to environmental protection, reduce costs, and can improve the performance of concrete construction. This paper focuses on the research of high-quality recycled coarse aggregate in different proportions(0, 40%, 70%,100%) instead of natural aggregate, effect of different cementitious material system for high performance concrete workability, mechanical properties and durability of. At the same time apply self- compacting recycled concrete to steel concrete swing column, carrying out the bending and shear performance experiment.In order to ensure the regeneration performance of self compacting concrete,especially the capability to meet the construction requirements, the test through the use of slag, fly ash and polycarboxylate superplasticizer and other components,according to the preparation of C50 strength grade recycled coarse aggregate concrete with different content, experiment of recycled self compacted concrete compressive strength of recycled aggregate quantity. Some conclusions on the analysis of the test results obtained for the reutilization of waste concrete to provide research basis.Taking into account the needs of their own rocking wall structure stiffness is large, so a concrete column, which uses high-strength steel and high strength concrete development of high-strength steel concrete rocking column. In this paper,CFST swing column has been carried on the three point bending test, study the flexural and shear properties.