High-performance concrete material for anchoring area of expansion joint and preparation method of high-performance concrete material

The invention relates to the technical field of concrete, and particularly discloses a high-performance concrete material for an expansion joint anchoring area, which is prepared from the following raw materials in parts by weight: 45 to 50 parts of Portland cement, 15 to 20 parts of fine aggregate, 20 to 25 parts of coarse aggregate, 10 to 15 parts of modified lignin blended flaky boron nitride agent, 3 to 5 parts of sodium carboxymethyl cellulose, 2 to 4 parts of water reducing agent and 40 to 50 parts of water. According to the high-performance concrete material disclosed by the invention, Portland cement is matched with fine aggregate and coarse aggregate to be blended and optimized through sodium carboxymethyl cellulose and a water reducing agent, and meanwhile, the added modified lignin is blended with a flaky boron nitride agent to be dispersed into a matrix, so that the anti-seepage, anti-cracking and strength properties of the matrix are improved, and the coordination effect of the two is optimized;