| 摘要 |
Conductive cement-based compositions exhibiting both good electrical conductivity and mechanical strength have been obtained by ensuring proper dispersion of conductive phase within the composition. The content of the ingredients depends on the preparation method, for instance conventional mixing or slurry infiltration, and on the type of the composition, i.e. conductive paste, mortar or concrete. The broad content ranges of the conductive composition are: a cement binder, a conductive phase consisting of one or more of the following: conductive fibers in the amount from 0 to 15 % by volume of the composition; conductive particles in the amount from 0 to 80 % by volume of the composition; water, at the weight ratio relative to cement binder from 0.2 to 0.75, fine aggregates at the weight ratio relative to cement binder from 0.0 to 2.0, and coarse aggregates at the weight ratio relative to cement binder from 0.0 to 2.0, conventional additives or admixtures, and optionally a dispersant. Exemplary compositions obtained according to the invention have a 28-day d.c. resistivity of 0.46-43 OMEGA cm and 28-day compressive strength of 35-71 MPa. |
