Axial compressive behavior of seawater sea-sand recycled aggregate concrete-filled double-skin non-corrosive tubular columns with square cross-section

2021 ◽  
Vol 167 ◽  
pp. 108213
Author(s):  
Pengda Li ◽  
Yingwu Zhou ◽  
Tianqi Yang ◽  
Qiaofei Yang ◽  
Feng Xing
Keyword(s):  
Cross Section ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Compressive Behavior ◽  
Aggregate Concrete ◽  
Tubular Columns ◽  
Sea Sand ◽  
Double Skin

Experimental Assessment of Stainless and Carbon Steel Double‐Skin Tubular Stub Columns Filled with Recycled Aggregate Concrete

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 764-771
Author(s):  
Deborah S. Castanheira ◽  
Luciano R. O. de Lima ◽  
Pedro C. G. da S. Vellasco ◽  
Katherine A. Cashell ◽  
Leroy Gardner
Keyword(s):  
Carbon Steel ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Experimental Assessment ◽  
Aggregate Concrete ◽  
Double Skin ◽  
Stub Columns

scholarly journals Compressive performance of 50 MPa strength concrete-filled square and circular tube (CFT) columns using recycled aggregate

2018 ◽  
Author(s):  
Sung-Mo Choi ◽  
Won Ho Choi ◽  
Kangseok Lee ◽  
Jae-Yong Ryoo ◽  
Sunhee Kim ◽  
...  
Keyword(s):  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Steel Pipe ◽  
Strength Development ◽  
Fine Aggregate ◽  
Mixing Ratio ◽  
Compressive Behavior ◽  
Aggregate Concrete ◽  
Cft Column

Recycled aggregate is an environmentally self-sustainable solution that can reduce construction waste and replace natural aggregates. However, there is a disadvantage in concrete such as initial strength drop and long-term strength development. Therefore, the interaction effect of the two materials can be expected by filling the cyclic aggregate concrete in the CFT column. In order to develop a concrete with compressive strength of 50 MPa as a recycled aggregate, we carried out a mixing experiment and fabricated 18 specimens to confirm the compressive behavior of a RCFT (Recycled Concrete Filled Tube) column that can be applied to actual buildings. Variable is the shape and thickness of steel pipe, concrete strength and mixing ratio, and coarse aggregate and fine aggregate are all used as recycled aggregate. The optimum mixing ratio for recycled aggregate concrete to be filled in the CFT filled steel pipe was found through three concrete preliminary mixing experiments. In addition, the compression test of the RCFT column was carried out to observe and analyze the buckling shape of the CFT column. Based on the analysis of the buckling configuration and the experimental data, the load-displacement curves of the specimens were drawn and the compressive behavior was analyzed. 

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