▎ 摘　　要

NOVELTY - Concrete material with electromagnetic wave absorption properties comprises 200-800 pts. wt. Portland cement, 15-20 pts. wt. dispersing agent, 3-7 pts. wt. graphene alkyne nano-material and 250-350 pts. wt. mixing water, where the particle diameter of the graphene alkyne nano-material is 200 nm-1 mu m, the dispersing agent is polyoxyethylene nonylphenyl ether and white waxy solid combined with its test performance indicators, the quality tolerance of the Portland cement is plus minus 1%, the quality tolerance of the dispersing agent is plus minus 0.5%, the quality tolerance of the graphene alkyne nano-material is plus minus 0.5% and the quality tolerance of the mixing water is plus minus 1%. USE - Used as concrete material with electromagnetic wave absorption properties. ADVANTAGE - The method is environmentally friendly and conducive to stealth effect; improves loss absorption performance; reduces reflectivity of incident electromagnetic waves and risk of electromagnetic information leakage. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the material, comprising (i) carrying out surface modification of graphene by polyoxyethylene nonylphenyl ether as dispersant, adding dispersing agent to mixing water and dissolving, adding graphene alkyne nano-material, and carrying out sonication to obtain uniformly dispersed graphite alkyne suspension, (ii) adding Portland cement to the mixing pot and mixing, homogenizing, adding the uniformly dispersed graphite alkyne suspension, stirring at high-speed for 120-150 seconds, stirring at low-speed for 80-100 seconds, and vibrating and compacting the stirred slurry casting mold, and (iii) placing the mold under standard curing conditions for 1 day and demolishing, further curing the sample at 20 plus minus 2 degrees C to the relative humidity of greater than or equal to 95% until the corresponding age and the absorbing performance is measured.