PURPOSE: To efficiently heat both of a recycled aggregate and a new aggregate by supplying the recycled aggregate in the inner cylinder of double cylinders and the new aggregate in an outer cylinder and relatively varying the exhausting quantity of heating gas fed from one end part by the inner and outer cylinders to heat.
CONSTITUTION: At the same time of feeding a new aggregate and a recycled aggregate respectively in a tilting outer cylinder 1 and an inner cylinder 10 provided concentrically, heating gas is introduced from the heating means 9 of a burner, etc. Then, after heating the new aggregate and the recycled aggregate respectively at prescribed temperatures by respectively adjusting the openings of dampers 23 and 24, both of the aggregates are discharged by a discharging manifolds 6 and 7 and mixed by a mixer to obtain a plied timber. Thus, in addition to an advantage of being capable of efficiently heating both of the aggregates, combustion and deterioration of the asphalt components of the recycled aggregate can be prevented.
KOIKE HIDEYUKI
YOSHINO KENJI
ATOMACHI TOMOHIRO
YAMABE IKUMASA
OMIYA KAZUKI
MIYAZAKI ICHIRO
NIPPON HODO