| 摘要 |
<p>PROBLEM TO BE SOLVED: To recycle defective ALC that is disposed as a waist by preventing the ALC panels from forming large cavities and removing dents and/or cavities on the panel faces and recycling the defective ALC that is disposed, as the product qualities such as compression strength are maintained, and provide the production process for ALC panels having excellent productivity and economy. SOLUTION: In the production of ALC panels that uses siliceous raw material, calcareous raw material and the process-repeated raw material are used as main materials, while an aluminum powder is used as a foaming agent, the ALC crushed powder in the process-repeated raw material is formulated instead of a part of the siliceous material in an amount of 15-25 wt.% in the inner percentage based on the whole solid materials or in an amount of 15-25 wt.% in the outer percentage based on the other whole raw materials and the water ratio of the slurry is set to 0.65±0.02. The aluminum powder is prepared by the dry process.</p> |
