Asphalt Composition

摘要

An asphalt composition containing 0.5 parts by mass or more and 20 parts by mass or less of a block copolymer and 100 parts by mass of an asphalt; the block copolymer comprising a polymer block (A) mainly comprising a vinyl aromatic monomer unit, and a copolymer block (B) containing a conjugated diene monomer unit and a vinyl aromatic monomer unit.

主权项

1. An asphalt composition, comprising
0.5 parts by mass or more and 20 parts by mass or less of a block copolymer, and 100 parts by mass of an asphalt; wherein the block copolymer comprises a polymer block (A) mainly comprising a vinyl aromatic monomer unit, and a copolymer block (B) comprising a conjugated diene monomer unit and a vinyl aromatic monomer unit; the content of the vinyl aromatic monomer unit in the block copolymer being 20% by mass or more and 60% by mass or less; wherein a content of the polymer block (A) in the block copolymer is 10% by mass or more and 40% by mass or less; wherein a hydrogenation rate of a double bond in the conjugated diene monomer unit of the block copolymer is 40% or more and 100% or less; and wherein the asphalt has a colloidal index ((a saturate fraction content+an asphaltene fraction content)/(a resin fraction content+an aromatic fraction content)) of 0.30 or more and 0.54 or less, and a saturate fraction content of 11% by mass or less.