Conductive cement-based compositions
US5447564A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1994 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Feb 16, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/94
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
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: PA0 a cement binder, PA0 a conductive phase consisting of one or more of the following: PA1 conductive fibers in the amount from 0 to 15% by volume of the composition; PA1 conductive particles in the amount from 0 to 80% by volume of the composition; PA0 water, at the weight ratio relative to cement binder from 0.2 to 0.75, PA0 fine agregates at the weight ratio relative to cement binder from 0.0 to 2.0, and PA0 coarse aggregates at the weight ratio relative to cement binder from 0.0 to 2.0, PA0 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.