▎ 摘　　要

NOVELTY - A cementitious composite binder composition comprises greater than or equal to 99 wt.% binder based on the total weight of the composition; and greater than or equal to 0.001 wt.% carbon based nanomaterial based on the total weight of the composition; where the composite made from the composition has (a) a compressive strength of greater than or equal to 15% greater than a compressive strength of the same composite made without the carbon based nanomaterial; and/or (b) a tensile strength of greater than or equal to 15% greater than a tensile strength of the same composite made without the carbon based nanomaterial. USE - A cementitious composite binder composition used for making a composite and concrete composite (all claimed). ADVANTAGE - The cementitious composites have improved properties such as higher compressive strength, tensile strength, Young's modulus, durability, thermal and/or electrical conductivity, a lower shrinkage and/or a modified viscosity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) making a composite which involves mixing a reaction mixture comprising (a) a dry cement or concrete ingredients and (b) a dispersion of sheared carbon based nanomaterial and water; and curing the mixture to form a composite; and (2) making a concrete composite having increased strength which involves mixing (a) a dry concrete ingredient comprising a sheared carbon based nanomaterial and (b) water; an (c) aggregates; and curing the mixture to form a concrete composite.