| 摘要 |
PROBLEM TO BE SOLVED: To obtain an aggregate for an asphalt mixture obtained by efficiently recycling a waste of a polyester fiber-based composite material by heating and kneading the waste of a specific fiber structure at a specified temperature, extruding the kneaded fiber structure in a specific condition and granulating the extruded product. SOLUTION: Used clothes 1 which are waste of a fiber structure composed of a polyester fiber-based composite material comprising (A) a polyester fiber and (B) a natural fiber are loaded in a hopper 2, and sent out to a screw-type heating extruder 3. The sent out materials are heated and kneaded at the temperature higher than the melting point of the component A by the screw-type heating extruder 3 to melt the component A and carbonize and degrade the component B so as to be divided into small powdery materials, so as to form a state in which the degraded and dispersed component B is included in the melted polyester resin. The mixed materials in the state is extruded so as to form a diameter for the objective aggregate size and cut and granulated to the aggregate size to provide the objective aggregate 5 for an asphalt mixture.
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