There is a possibility of a poor state of concrete compaction due to the segregation and interlocking of aggregate and paste, even if a self-compacting high-performance concrete is used for the reinforced concrete structural members. This paper presents the effects of the quality of compaction on the flexural behaviour of self-compacting high-performance concrete beams with three examples of different concrete filling conditions, that is, compaction. The first example of compaction specimen was soundly cast to obtain the perfect concrete filling condition. The second was cast in such a way that good concrete was filled between the longitudinal tensile reinforcement and the top, while poor concrete was intentionally poured below the tensile reinforcement to simulate the poor strength, workability and unsatisfactory compaction. The third was cast just as the second except that poorly compacted concrete was poured up to the neutral axis instead of just to the tensile reinforcement. Nine flexural tests were conducted on full-scale beam specimens. The performance of different states of compaction is discussed in terms of the flexural capacity, the load-displacement response, the failure pattern, the ductility and the crack control at service load levels. Test results demonstrate that the state of compaction has an insignificant effect on the ultimate flexural capacity whereas it has a great influence on the stiffness and ductility of structural members.
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)