Experimental study on reuse of recycled concrete aggregates for load-bearing components of building structures
- 172 Downloads
Recycled aggregates recovered from abandoned buildings or demolished concrete structures were reused to produce concrete columns as new building components. A quasi-static test on 10 recycled aggregate concrete filled steel tubular (RACFST) columns was carried out. The mechanical properties of RACFST columns in the study include failure mode, hysteretic loops, skeleton curves, stiffness deterioration curves and energy dissipation capacity. RACFST columns with different recycled aggregate replacement ratios were tested under constant axial load and cyclic lateral load. The seismic performance of the columns was analyzed. The experimental results indicate that concrete adding recycled aggregates does not reduce the lateral stiffness of the columns, and their energy dissipation capacity is nearly as good as that of natural aggregate concrete filled steel tubular columns. The usage of recycled aggregate concrete has little influence on the lateral load-bearing capacity and the stiffness deterioration of RACFST columns. The current calculation for natural aggregate concrete filled steel tubular columns to estimate the lateral load-bearing capacity of RACFST columns tends to be relatively conservative. The reuse of recycled aggregates for load-bearing components of building structures especially for concrete filled steel tubular columns is feasible.
KeywordsDemolished concrete structures Recycled aggregates Concrete filled steel tubular columns Mechanical property
This research was jointly funded by the National Natural Science Foundation of China (Project nos. 51278132, 11472084) and Science and Technology Planning Project of Guangzhou City (Project no. 201704030057). These foundations are greatly appreciated.
- 8.Konno K, Sato Y, Kakuta Y et al (1998) The property of recycled concrete column encased by steel tube subjected to axial compression. Trans Japan Concr Inst 19:231–238Google Scholar
- 18.Teng JG, Zhao JL, Yu T et al (2012) Recycling of coarsely-crushed concrete for use in FRP tubular columns. In: Proceedings of the First International Conference on Performance-Based and Life-Cycle Structural Engineering, 2012, pp 1389–1397Google Scholar
- 19.Liu F, Yan Y, Li LJ (2012) Experimental study on impact performance of recycled plastic reinforced concrete. In: Proceedings of the First International Conference on Performance-Based and Life-Cycle Structural Engineering 2012, pp 1409–1421Google Scholar
- 20.DG/TJ 08-2018-2007 (2007) Technical specification for application of recycled concrete. Shanghai (in Chinese)Google Scholar
- 21.DB34/T 1262-2010 (2010) Technical specification for concrete-filled steel tubular structures. Hefei (in Chinese)Google Scholar
- 22.JGJ101-96 (1996) Specification of testing methods for earthquake resistant building. China Architecture and Building Press, Beijing (in Chinese)Google Scholar
- 23.CECS 28:90 (1990) Design and construction specification for concrete-filled steel tubular structures. China Planning Press, Beijing (in Chinese)Google Scholar