Abstract
The compaction mechanism was examined based on the vertical movements of each constituent material which were found by mix analysis test results of concrete in prismatic specimen during the vibration process. Both water cement ratio W//C and air content a were pointed out as the important internal composition factors influencing on mechanical properties, and the relation between a parameter (W/C+κ·a) and compressive strength was obtained. Furthermore, since the compaction degree could be evaluated by the parameter, this was applicable to compaction control as a quality characteristic. This was designated as compaction factor CF, and relations between CF and compacting conditions such as vibrator weight, vibrating frequency, amplitude and specimen size were examined.
