Regeneration Of Concrete Filled Steel Tubular Short Column Bearing Performance Analysis

With the rapid development of Chinese economic, accelerated pace of urban construction, new construction and maintenance of old buildings, the demolition process produces large amounts of waste concrete. How to deal with these abandoned concrete, to become a pressing issue. Recycled concrete technology as green concrete, implementation, resources, environmental sustainability one of the main measures are increasing people's attention. Because of structural performance of recycled concrete as compared with ordinary concrete structure was significantly lower, hindering the recycled concrete in structural engineering applications. In this regard, in a comprehensive analysis of domestic and international research on the basis of the combined structure of recycled concrete used to form a composite structure of steel recycled concrete. The paper in steel recycled concrete structure made a comprehensive system of research.The thesis includes 6 chapters. The main contents in brief are following:Chapter 1 the introduction, expounds this topic research of purpose and meaning, reviews the development course of recycled concrete to domestic and international steel tube of recycled concrete research development level to review, analyses the development process of recycled concrete the deficiencies and the problems faced.Chapter 2 mainly introduces the basic characteristics of recycled concrete and regeneration aggregate. Including recycled concrete compressive strength, tensile strength and influence of recycled concrete intensity factors. Regeneration aggregate apparent density, bulk density, bibulous rate and improve the performance of the method, etc.Chapter 3 recycled concrete of orthogonal experiment and mechanical properties of research.. Orthogonal test, analysis of the replace the amount of recycled aggregate, super plasticizer dosage, preparation of fly ash on the new recycled aggregate concrete, and identifies the optimal level combination of three factors. The best combination of three factors for the 50% of recycled aggregate materials, 10% of super plasticizer,8% of fly ash.Chapter 4 Steel tube regeneration self-compacting concrete axial compressive short column test through experiment, analysis knowable steel tube regeneration self-compacting concrete in some of the component is structure can applied.Chapter 5 recycled concrete of feasibility analysis. Economically and technically the feasibility analysis, in the current conditions promotion use recycled aggregate, need government industry policy support and the national laws and regulations safeguard.Chapter 6 summarizes the thesis and poses the problems for further research.