Method of producing cement panels reinforced with fibers

Abstract

A cement panel reinforced with fibers comprising a base plate composed predominantly of inorganic fibers and a cement, an inner waterproof layer of a synthetic resin formed on a surface of the base plate, a coloring material layer composed predominantly of a cement and a pigment and formed on the inner waterproof layer, and a surface waterproof layer of a synthetic resin formed on the coloring material layer. The synthetic resin of the inner waterproof layer, having penetrated into both the base plate and the coloring material layer and solidified, gives a fastener effect, bonding them together. Also disclosed is a method of producing such cement panels comprising the steps of preparing a base plate material from a mixture consisting predominantly of inorganic fibers and a cement, applying a liquid synthetic resin composition to a surface of the base plate material which has started to solidify but is still in a soft state to form an inner waterproof layer thereon, applying a coloring material composed predominently of a cement and a pigment to the inner waterproof layer to form a coloring material layer thereon, pressing the resulting base plate material, and shaping the pressed material, whereby the liquid synthetic resin composition is caused to penetrate into both the base plate material and the coloring material layer. The panels obtained have high freeze-thaw resistance.