To provide inorganic reinforcing material for filling a fireproof door frame, having excellent fluidity, quick drying property and lightweight property, easily filling up a hollow part of a door frame disposed in the periphery of a door board and hardening the same, and giving fireproof performance to the door frame.
This inorganic reinforcing material for filling up the fireproof door frame includes: cement mixed with hydraulic aluminates compound; aggregate; and aluminum powder. The viscosity in the lapse of twenty minutes after the hydrolytic start is 4 to 200 dPa s, the surface hardness in the lapse of one hour after the hydrolytic start is 1 MPa or higher, and preferably the absolute dry density after curing is 400 to 1,400 kg/m3. The hollow part of the door frame is filled up with the inorganic reinforcing material for filling up the fireproof door frame and the material is cured to obtain the fireproof door frame 2 produced in a factory and disposed in the periphery of the fireproof door board 1, lightweight and having excellent fireproof performance.
YAGI YOSHIKI
AONO YOSHIMICHI
