▎ 摘　　要

NOVELTY - Modification of pulverized coal ash comprises grinding pulverized coal ash, dry ball milling, and sieving; dispersing in water, ultrasonically stirring, and dispersing; dissolving graphene oxide in water for ultrasonic stirring to obtain graphene oxide liquid; mixing pulverized coal ash liquid with 2/3 graphene oxide liquid, adjusting pH to alkaline, ultrasonically stirring, mixing with silane coupling agent, and stir-reacting at 60-70degreesC for 5-8 hours; and adding nano-silicon dioxide, stirring, adding with triethanolamine and remaining graphene oxide liquid, stirring, vacuum filtering, and drying. USE - The method is used for modifying pulverized coal ash in cement, concrete, mortar and other building material additive. ADVANTAGE - The method improves the performance of the fly ash, improves the application of the concrete early strength is low, and removes the redundant silane coupling agent. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for modified pulverized coal ash.