Push-Out Test on Bond Property of Micro-Expansive Concrete-Filled Steel Tube Columns
The shrinkage/expansion behavior and bond carrying capacities of 4 short, micro-expansive concrete-filled steel tube (MCFST) and 3 short, conventional concrete-filled steel tube (CFST) columns were experimentally investigated. The results indicate that pre-stress is produced in the core concrete under the confined by the steel tube. Both expansive agent and water cement ratio have important influence on expansive behaviors of MCFST. The current work also indicates that the MCFST columns have higher bond strength than conventional CFST columns and this recommends a new method to improve the bond strength of composite structures.
K. C. Xu et al., "Push-Out Test on Bond Property of Micro-Expansive Concrete-Filled Steel Tube Columns", Advanced Materials Research, Vols. 163-167, pp. 610-614, 2011