High-modulus asphalt particle for road building and preparation method thereof

The invention relates to a high-modulus asphalt particle for road building and a preparation method thereof. The high-modulus asphalt particle comprises the following components in parts by mass: 40-80 parts of modified asphalt and 20-60 parts of filler, wherein the modified asphalt comprises the following raw materials in parts by mass: 10-20 parts of a polymer, 0.1-5 parts of an anti-aging agent, 2-4 parts of a thickener, 2-5 parts of a modifier, 1-3 parts of a crosslinking agent and 50-90 parts of matrix asphalt, wherein the matrix asphalt is one of Shell No. 70, Shell No.90, SK No. 70 and SK No. 90. Compared with the prior art, the preparation method is simple in process and low in cost, the waste utilization is achieved and the asphalt particle is suitable for industrial production; by the prepared high-modulus asphalt particle, the rutting resistance, low-temperature crack resistance, water damage resistance and aging resistance of asphalt concrete can be significantly improved and the service life of the asphalt pavement is prolonged; and the high-modulus asphalt particle is very safe and convenient to store and transport, is energy-saving and environment-friendly and has significant economic and social benefits.