GYPSUM-BASED MATERIAL FOR PREVENTING FIRE SPREAD DURING ELECTRIC CABLE FIRES

摘要

P AN EFFICIENT BARRIER CAN BE CONSTRUCTED AGAINST THE SPREAD OF FIRE BY COMBUSTION OF INSULATORS OF ELECTRICAL CABLES THROUGH WALLS OR PLACES IN TUBES OR WIRE GUIDANCE CHANNELS FLOWING IN THE OPENING, OR FROM PLACE IN PLACE IN THE CHANNEL, A WET PSEUDOPLASTIC MORTAR, FORMED BY INCORPORATING WATER INTO A GYPSUM COMPOSITION, A MIXTURE OF INERT FILLERS COMPRISING INFUSORY EARTH AND A LIGHT EXPANDED AGGREGATE SUCH AS PERLITE OR VERMICULITE , AND VERY SMALL PROPORTIONS OF GLYCERIN, BORIC ACID AND A CORROSION INHIBITOR, THE BARRIER CONSTITUTED AFTER TAKING AND DRYING OF THE MORTAR IS FLAME RETARDANT AND HAVING A SUFFICIENTLY LOW COMPRESSION RESISTANCE TO BE ABLE TO REMOVE REMOVAL OR MAINTENANCE WITHOUT DAMAGING THE CABLES. /P