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A light weight formed body used for building materials, heat-insulating materials, furnitures, backing materials and the like, and a method for producing the same. In the light weight formed body and in the manufacturing method thereof, the principal material is a surface-reformed slag of which the

A light weight formed body used for building materials, heat-insulating materials, furnitures, backing materials and the like, and a method for producing the same. In the light weight formed body and in the manufacturing method thereof, the principal material is a surface-reformed slag of which the reforming involves reforming through the dissolution reaction and the hydration reaction of glass and the reforming through dehydration of the surface-reformed slag above mentioned under heating, and one or more of a polymer dispersion, a reinforcing fiber, a coagulant, a light weight aggregate, a thickener, a dispersing agent, a pigment, a synthetic pulp, a needle- to fiber-shaped calcium silicate hydrate and a hydraulic gypsum are further used together with the above principal material.

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A light weight formed body having a bulk specific gravity of 0.2 to 1 g/cm3 and which can be cut, scraped and nailed comprising a (i) powder having a BET surface area of 100-140 m2/g produced by reforming a glassy blast furnace slag powder with an alkali aqueous solution through a dissolution reacti

A light weight formed body having a bulk specific gravity of 0.2 to 1 g/cm3 and which can be cut, scraped and nailed comprising a (i) powder having a BET surface area of 100-140 m2/g produced by reforming a glassy blast furnace slag powder with an alkali aqueous solution through a dissolution reaction and a hydration reaction of glass or comprising a (ii) powder having a BET surface area of 100-140 m2/g produced by reforming a glassy blast furnace slag powder with an alkali aqueous solution through a dissolution reaction and a hydration reaction of glass and then dehydrating with heating, and comprising a polymer dispersion, wherein the light weight formed body comprises 3 to 20% of the polymer dispersion as ratio by weight of solid matter to the powder produced by reforming the glassy blast furnace slag powder, 2 to 10% of glass fiber as ratio by weight to the powder produced by reforming the glassy blast furnace slag powder and 0.05 to 0.2 part of a cationic polymer coagulant by weight per 1 part by weight to the solid matter of the polymer dispersion. The process for producing a light weight formed body having a bulk specific gravity of 0.2 to 1 g/cm3 and which can be cut, scraped, and nailed, which light weight formed body comprises a (i) powder having a BET surface area of 100-140 m2/g produced by reforming a glassy blast furnace slag powder with an alkali aqueous solution through a dissolution reaction and a hydration reaction of glass or comprises a (ii) powder having a BET surface area of 100-140 m2/g produced by reforming a glassy blast furnace slag powder with an alkali aqueous solution through a dissolution reaction and a hydration reaction of glass and then dehydrating with heating, and comprises a polymer dispersion, and wherein the light weight formed body comprises 3 to 20% of the polymer dispersion as ratio by weight of solid matter to the powder produced by reforming the glassy blast furnace slag powder, 2 to 10% of glass fiber as ratio by weight to the powder produced by reforming the glassy blast furnace slag powder and 0.05 to 0.2 part of a cationic polymer coagulant by weight per 1 part by weight to the solid matter of the polymer dispersion, which process comprises: (a) adding the polymer dispersion, the glass fiber, and water to the powder produced by reforming the glassy blast furnace slag powder; (b) kneading; (c) further adding the cationic polymer coagulant; (d) forming the light weight formed body by press dehydration; and (e) drying.