Abstract
Recycled concrete aggregate filled tubes (RCFT) is one of the composite columns that has a good potential to be applied in the construction. A polyvinyl chloride (PVC) is utilised as the column skin and it is filled with recycled concrete aggregate (RCA). This concept has evolved from the use of concrete filled tubular members. This study demonstrates the experimental investigation of RCFT acting as columns in compression incorporating varies percentages of RCA. The size of RCFT employed in this study is 300 mm in length and 150 mm in diameter. The ultimate compressive load are determined in this study and compared with the theoretical values. Axial shortening in the RCFT specimens are also investigated. It is observed that the experimental ultimate compressive load, Nexp, is higher than theoretical ultimate compressive load, Ntheo, as per EC4. Lower percentage of RCA resulted in the increment of ultimate compressive load. From this study, the RCFT shows a good potential to be utilised as a composite column system especially in structure with low load bearing capacity.
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