Patent ID: 6251316
Filing Date: 2001-06-26
Classification: C04B

Abstract:
A method of providing a solid article of clay foam to be used in building, including the steps of:a) providing baked clay which has been ground to form clay particles;b) providing a water solution of a salt of silicic acid;c) mixing the clay particles and the water solution to form a fluid mass;d) dividing the fluid mass into a first portion and a second portion and placing each portion in a separate first and second container, respectively;e) adding formaldehyde to the first portion in the first container in an amount of 5-15% by weight of the first portion and thoroughly stirring;f) adding hydrogen peroxide to the second portion in the second container in an amount of about of 5-15% by weight of the second portion and thoroughly stirring;g) sucking the fluid mass in the first and second containers into a sealed vacuum reactor and mixing thoroughly to form a reaction mixture wherein the silicic acid salt is caused to harden and gel thus forming a porous, solid mass; andh) transferring the porous, solid mass to a mold to dry, thus forming the desired clay foam solid article.