PURPOSE: To efficiently supply aggregate by storing aggregates heat-dried with a drier in storing bottles by grain diameter and replenishing aggregate of a gain diameter according to its using ratio.

CONSTITUTION: Aggregates 1a to 1d stored by each kind are heat-dried with a drier 5, a screened with an oscillating screen 8 and stored in aggregate storing bottles 9a to 9d by the grain diameter. When a stored quantity becomes small by paying out of the aggregates from the bottles 9a to 9d, the change of a weight is detected by a load cell, the aggregate cutting out quantity of respective aggregate hoppers 1a to 1d is calculated by adding grain size distribution obtained by analyzing in advance and the aggregates are cut off accordingly.