The Electrical Conductivity of Fluoroanhydrite Compositions Modified at the Nanoscale Level with Carbon Black

The electrical conductivity of fluoroanhydrite compositions modified with different amounts of ultrafine soot was studied. The optimal ratio of additive and binder was determined in terms of both electrical conductivity and compressive strength. The research results have showed that the addition of ultrafine carbon black in the amount of 7 % by the binder mass had a significant influence on the mechanical properties of the composition as well as its electrical conductivity. The strength of the samples with 7 % of ultrafine carbon black decreased up to 23.9 MPa at the age of 14 days whereas the reference sample strength was 40.1 MPa. At the same time the electrical resistance of the modified samples was 99.65 Ω at the age of 14 days whereas the electrical resistance of the reference samples reached 128.1 kΩ. The developed fluoroanhydrite composition was modified at the nanoscale level with carbon black and it can be used as material for the antistatic and grounding conductive flooring.