Abstract: A fire-resistant partition wall includes wall studs and first and second walls each including gypsum boards with vertical and lateral joints. The wall studs are on the back side of the vertical joints. A joint base member is provided at the lateral joints. The gypsum boards, the joint base member, and the wall studs are not screwed with a common screw, and (a) the gypsum boards are screwed to only the wall studs and are not screwed to the joint base member, and the joint base member is fixed to the lateral joint position by being inserted between the gypsum boards and the wall studs, or (b) the gypsum boards are screwed to the wall studs and to the joint base member with different screws, and the joint base member is fixed to the lateral joint position by being inserted between the gypsum boards and the wall studs.

Abstract: A fire-resistant partition wall includes wall studs and first and second walls each including gypsum boards with vertical and lateral joints. The wall studs are on the back side of the vertical joints. A joint base member is provided at the lateral joints. The gypsum boards, the joint base member, and the wall studs are not screwed with a common screw, and (a) the gypsum boards are screwed to only the wall studs and are not screwed to the joint base member, and the joint base member is fixed to the lateral joint position by being inserted between the gypsum boards and the wall studs, or (b) the gypsum boards are screwed to the wall studs and to the joint base member with different screws, and the joint base member is fixed to the lateral joint position by being inserted between the gypsum boards and the wall studs.

Abstract: Provided is an insolubilizing material for a specific toxic substance useful for insolubilizing a heavy metal or the like conducted by applying the insolubilizing material for a specific toxic substance to soil or on the surface of the soil. The insolubilizing material, for a specific toxic substance, is used in a manner so that soil does not reach a strongly alkaline region of a pH of 11 or more. The insolubilizing material for a specific toxic substance comprises an amorphous aluminum compound or a derivative thereof as a main component. The insolubilizing material functions as a solidifying material. The insolubilizing material also comprises gypsum obtained by adding and mixing, to the gypsum, the amorphous aluminum compound or the derivative thereof in a range from 0.5 to 60 mass parts relative to 100 mass parts of the gypsum. A method for improving soil using the insolubilizing material is also disclosed.

Abstract: Provided is a practically valuable and economically excellent insolubilizing material for a specific toxic substance: that is useful for insolubilizing treatment for a heavy metal or the like conducted by applying the insolubilizing material for a specific toxic substance to soil or on the surface of the soil; that is capable of effectively insolubilizing and immobilizing the heavy metal or the like; that is capable of making treated matter neutral so as to be reusable and environment-friendly; and moreover that is capable of imparting strength to the treated matter as necessary; and with which the heavy metal or the like is not re-eluted even when the treated matter is exposed to an environment under a neutral condition or an acidic condition.

Abstract: The present invention intends to provide a practically valuable insolubilizing material for a designated hazardous substance (a heavy metal or the like) and an insolubilization method using the insolubilizing material for a designated hazardous substance, the insolubilizing material and method: making it possible to conduct treatment in a neutral region from start to finish to effectively insolubilize and immobilize a heavy metal or the like, which is contained in soil and the vicinity of the surface of the soil and which has adverse effects on health, by adding the insolubilizing material to the soil to mix with the soil, or spraying the insolubilizing material on the soil; and making the treated matter reusable, environmentally friendly, and neutral without fail.

Abstract: The purpose of the present invention is to provide a gypsum fertilizer for blueberries and a method for suppressing blueberry abscission that can suppress abscission of blueberry fruits without adversely affecting the growth of the blueberry fruits, and not only increases the crop yield but also eliminates the need for frequently collecting fallen fruits, thus yielding a major practical effect. The purpose is achieved by a gypsum fertilizer for blueberries containing gypsum having a BSA specific surface area of 15000 cm2/g or less as a main component, and a method for suppressing blueberry abscission using the gypsum fertilizer.

Abstract: The present invention intends to provide a practically valuable insolubilizing material for a designated hazardous substance (a heavy metal or the like) and an insolubilization method using the insolubilizing material for a designated hazardous substance, the insolubilizing material and method: making it possible to conduct treatment in a neutral region from start to finish to effectively insolubilize and immobilize a heavy metal or the like, which is contained in soil and the vicinity of the surface of the soil and which has adverse effects on health, by adding the insolubilizing material to the soil to mix with the soil, or spraying the insolubilizing material on the soil; and making the treated matter reusable, environmentally friendly, and neutral without fail.

Abstract: The present invention provides: a composition for treating debris in order to separate earth and sand from the debris that contains the earth and sand adhered thereto, the composition containing 0.1 to 10 mass parts of a polymer flocculant relative to 100 mass parts of gypsum, in which the gypsum has a BSA specific surface area of 15000 cm2/g or less, and the polymer flocculant takes a form of a powder containing 95% or more of particles having a particle size of 200 ?m or less; and a method for treating debris including a treatment step of adding 10 to 100 kg of the gypsum and 0.01 to 10 kg of the polymer flocculant to 1 m3 of the debris containing earth and sand adhered thereto, and then kneading the resultant mixture, and a separation step of separating a kneaded product obtained in the treatment step into the debris and the earth and sand adhered to the debris.

Abstract: An object of the present invention is to provide a high-expansion gypsum composition in which the expansion coefficient of a general purpose dental gypsum material or the like is simply and effectively improved to such an extent that has never been achieved with conventional technologies without using any special material by adding an inexpensive additive even in a small addition amount, and furthermore another object of the present invention is to provide a high-expansion gypsum composition the setting expansion coefficient of which is appropriately controlled so that the contraction of a resin to be used can be precisely dealt with, the high-expansion gypsum composition being useful for manufacturing a reproduction model to be used in manufacturing a “non-clasp denture” having no problem in, for example, occlusion (adaptability).

Abstract: An object of the present invention is to provide a high-expansion gypsum composition in which the expansion coefficient of a general purpose dental gypsum material or the like is simply and effectively improved to such an extent that has never been achieved with conventional technologies without using any special material by adding an inexpensive additive even in a small addition amount, and furthermore another object of the present invention is to provide a high-expansion gypsum composition the setting expansion coefficient of which is appropriately controlled so that the contraction of a resin to be used can be precisely dealt with, the high-expansion gypsum composition being useful for manufacturing a reproduction model to be used in manufacturing a “non-clasp denture” having no problem in, for example, occlusion (adaptability).

Abstract: Provided is a practically valuable and economically excellent insolubilizing material for a specific toxic substance: that is useful for insolubilizing treatment for a heavy metal or the like conducted by applying the insolubilizing material for a specific toxic substance to soil or on the surface of the soil; that is capable of effectively insolubilizing and immobilizing the heavy metal or the like; that is capable of making treated matter neutral so as to be reusable and environment-friendly; and moreover that is capable of imparting strength to the treated matter as necessary; and with which the heavy metal or the like is not re-eluted even when the treated matter is exposed to an environment under a neutral condition or an acidic condition.