Abstract: A sheet gasket comprising a swelling sheet, a non-swelling layer laminated on the swelling sheet, and an adhesive layer coated on the surface of the non-swelling layer. This gasket is adapted to be inserted between flanges having different coefficients of thermal expansion, with the adhesive layer adhered to one of the flanges and the exposed swelling sheet adjacent to the other flange.

Abstract: A novel process for producing a non-combustible gypsum board and a non-combustible laminated gypsum board having superior practical physical properties, smoothly and efficiently is provided, which process is characterized by preparing a mixture consisting of a powdery gypsum consisting of 50 to 95 parts by weight of a hydrating gypsum and 5 to 50 parts by weight of gypsum dihydrate, a definite amount of fibers and a definite amount of a caking retarder and a necessary amount of water; molding the mixture before the hydrating gypsum is hydrated; and setting and drying the resulting molded material.

Abstract: A method for covering sodium conveying piping in a fast breeder reactor which makes use of metallic sodium as a coolant material is described herein, which method consists of the steps of preparing a covering material by mixing a raw material having sodium resistance and silicate or phosphate under a wet condition and after press-shaping said mixture drying the shaped mixture, and covering the sodium conveying piping with said covering material, whereby dispersion of leaked metallic sodium from the piping can be prevented.