Electrically conductive building material containing pulverized fuel ash or fly ash derivatives

摘要

An electrically conductive building material comprises a binder and an aggregate, wherein the material further comprises a high carbon content particulate material or a high iron content particulate material or a mixture of these particulate materials. The high carbon particulate material contains greater than 25% carbon by weight and may be a derivative of pulverized fuel ash or fly ash, with the optional addition of calcined petroleum coke. The material shields against electromagnetic radiation and may be used to line an electromagnetically screened room 1. The electrically conductive material has a wide range of other applications including: covering the surface of an alarm system being electrically integrated into the alarm system; a leak detection mechanism comprising a vessel covered at least in part with the material; and a slug repellant pot, trough or paving slab.