Cementitious compositions containing shredded polystyrene aggregate.

摘要

Fireproofing compositions comprise a hydratable cementitious binder and shredded polystyrene aggregate characterised in that the shredded polystyrene has a particle size distribution such that a range of about 0 to about 20 percent by weight of the particles is retained by a sieve having a hole size of 1.679mm and a maximum of about 40 percent by weight of the particles passes through a sieve having a hole size of 0.594mm and is retained by a sieve having a hole size of 0.0432mm. On addition of water, the compositions form settable, sprayable slurries which are capable of spray application to steel structural members and adhere to the member in the slurried state and after setting to provide fire and heat protection.