▎ 摘　　要

NOVELTY - Graphene/oxide composite powder-modified cement comprises graphene/ferroferric oxide composite powder, foaming polystyrene and silicate cement, where graphene/ferroferric oxide composite powder is modified-absorbing cement powder. The filling rate of foaming polystyrene is 40-70 vol.%. The diameter of foaming polystyrene is 2-6 millimeter. The volume content of graphene/oxide composite powder is 2-5 wt.%. The mass ratio of graphene/oxide composite powder and modified cement is (2:1)-(1:2). USE - Graphene/oxide composite powder-modified cement. ADVANTAGE - The graphene/oxide composite powder-modified cement is having microwave frequency range of 8-18 gigaHertz and full absorption above -14.2 decibel and has enhanced absorption performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for foaming of surface modified polystyrene, which involves: (A) cleaning expandable polystyrene surface by using inorganic solvent; (B) mixing expandable polystyrene grain with surface; (C) diluting polymer binder polyvinyl alcohol by water; (D) stirring uniformly and pouring cleaned expandable polystyrene, surface particles and coupling agent; and (E) soaking and drying to obtain foaming of surface modified polystyrene.