▎ 摘　　要

NOVELTY - Preparation of graphene-modified glass fiber involves mixing water and glass fiber, adding alkaline solution, adjusting pH to 8-9, uniformly dispersing, filtering glass fiber, drying, adding obtained pretreated glass fiber to an active agent-containing graphene dispersion having pH of 6-7, and filtering obtained graphene-modified glass fiber dispersion. USE - Preparation of graphene-modified glass fiber used for preparing sulfate-resistant graphene concrete composite material (all claimed). ADVANTAGE - The method enables preparation of graphene-modified glass fiber with high strength and flexibility, and large surface area. The graphene-modified glass fiber provides sulfate-resistant graphene concrete composite material with high toughness. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) sulfate-resistant graphene concrete composite material, which comprises 120-280 kg/m3 cement, 40-50 kg/m3 fly ash, 40-80 kg/m3 fumed silica, 450-900 kg/m3 coarse aggregate, 60-130 kg/m3 sand, 15-60 kg/m3 nano-silica, 25-60 kg/m3 graphene-modified glass fiber, 0.5-8 kg/m3 water reducing agent and 100-180 kg/m3 water; and (2) preparation of sulfate-resistant graphene concrete composite material.