Method of manufacturing autoclaved, cellular concrete...

B - Operations – Transporting – 28 – B

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B28B 1/50 (2006.01) B28B 15/00 (2006.01) C04B 18/06 (2006.01) C04B 28/18 (2006.01)

Patent

CA 2418011

A method of manufacturing autoclaved cellular concrete products using bottom ash, that uses the following steps: (1) selecting a suitable quantity of bottom ash; (2) processing the bottom ash into fine pellets to increase its overall surface area and expose silicate compounds located therein; (3) mixing the processed bottom ash with water to form a slurry; (4) mixing cement, lime and aluminum powder into the slurry to form calcium silicate crystals; (5) pouring the slurry into molds to form various construction components; (6) initially curing the slurry in the molds at room temperature and atmospheric pressure; and (7) curing the slurry in the molds using surface pressure, temperature, and steam to transform the calcium-silicate crystals into Tobermorite.

L'invention concerne un procédé de fabrication de produits de béton cellulaire traité à l'autoclave, qui repose sur l'utilisation de mâchefer. Le procédé consiste 1) à sélectionner une quantité adéquate de mâchefer, 2) à transformer le mâchefer en fins granules afin d'augmenter sa surface totale et d'exposer ses composés silicatés, 3) à mélanger le mâchefer transformé à de l'eau pour former une suspension épaisse, 4) à mélanger le béton, de la chaux et de la poudre d'aluminium dans la suspension pour former des cristaux de silicate de calcium, 5) à verser la suspension dans des moules pour former divers composants de construction, 6) à faire durcir dans un premier temps la suspension dans les moules à température et à pression atmosphérique ambiantes, et 7) à faire durcir la suspension dans les moules au moyen de la pression de surface, la température et la vapeur afin de transformer les cristaux de silicate de calcium en Tobermorite.

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