| 摘要 |
PROBLEM TO BE SOLVED: To provide an air permeable wall in which flame or ash is not externally leaked without simply clogging with the ash by providing sufficient fire resistance, heat resistance, strength against contact with high temperature atmosphere, and satisfactory air passing performance even under any severe conditions. SOLUTION: The air permeable wall for a combustion equipment obtained by kneading and molding cement and water with aggregate comprises 300 to 600 pts.wt. of the aggregate and 25 to 40 pts.wt. of water per 100 pts.wt. of cement in such a manner that the aggregate having a particle size of 2 to 20mm contains 90% or more to the overall aggregate. |
