To provide an asphalt composition having excellent flow resistance and abrasion resistance, namely an asphalt-modifying material capable of improving the durability of paved roads.
This asphalt-modifying material is characterized by comprising waste plastics thermally treated and purified in a solvent. When the waste plastics are thermally treated and purified in the solvent, for example, paper in the waste plastics is thermally decomposed, and aluminum foils are precipitated and separated. Thereby, the foreign matters in the waste plastics can be removed, and it can be prevented that the foreign matters disturb the adhesion of the modified asphalt to aggregates in the asphalt to lower the mutual binding of the aggregates. Thus, the asphalt-modifying material suitable for obtaining an asphalt composition having excellent flow resistance and abrasion resistance, namely an asphalt composition capable of improving the durability of paved roads, can be provided at a lower cost than those of conventional modifying materials.
ANYASHIKI TAKASHI
ARIYAMA TATSURO
MIYAZAWA KUNIO
