Abstract
This paper describes the preparation of vibrating compaction of concretes by the use of artificial lightweight aggregates, especially the consolidation on a vibrating table for dry mixes. The effects of vibrating frequency, amplitude, acceleration and time on the compressive strength of concrete were investigated.
These test results are summarized as follows:-
(1) The use of a vibrating table is a more effective method for obtaining consolidation of lightweight concrete in thin sections than internal vibration.
(2) The frequency of 3000 to 5000vpm, the amplitude of 0.6 to 1.1mm and the acceleration of 5 to 10g concerning the vibrator table used for this study are found to be suitable for the compaction of lightweight concrete.
(3) The length of time taken in vibration on the table can be somewhat shortened for lightweight concrete, although the optimum condition of compaction is dependent on the shape of the aggregate that was used.
(4) When the internal vibrator of a rod type is used for lightweight concrete, vibration of higher frequency is preferred for efficiency. However, the distance between the pair of legs of the plug must be kept as close as possible.
