▎ 摘　　要

NOVELTY - A sulfur magnesium cement-based composite material comprises graphene, nano-material dispersing agent, antifoaming agent, superfine silica gel powder, starch, magnesium sulfate solution and burned magnesium oxide (MgO) powder. The graphene is present at 0.02-2 mass% of the light-burned magnesium oxide powder. The mass ratio of graphene, nano-material dispersing agent, antifoaming agent, superfine silica gel powder, and starch is 1:(0.005-0.05):(0.002-0.01):(0.003-0.03):(0.02-0.3). USE - Sulfur magnesium cement-based composite material. ADVANTAGE - The sulfur magnesium cement-based composite material has high tensile strength, excellent durability and reliability, simple and easy preparation method, and low cost, and is energy-saving and environment-friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation of sulfur magnesium cement-based composite material comprising dispersing the graphite, nano-material dispersing agent, superfine silica gel powder and starch, mixing them uniformly, adding in the magnesium sulfate solution, dispersing to obtain the mixed solution; and mixing the mixed solution, defoaming agent and light-burned magnesium oxide powder and stirring uniformly, pouring into a mold, demolding for 12-36 hours, and curing to obtain the product.