| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide lightweight artificial aggregate having a low density. SOLUTION: This artificial aggregate is produced by blending a siliceous raw material with a calcareous raw material (or followed by crushing the mixture), by adding water to the mixture to form slurry, by casting the slurry into formwork to cure it, by cutting or breaking raw cake in the lengthy direction while extruding with meshed knives, which is cured into a semiplastic state in the formwork, by rolling its pieces and by subjecting them to high pressure steam curing. It is possible that the mixture is mixed with calcium sulfate in a content of 0.5-10 wt.% in terms of CaSO4 and a blowing agent, that cement as a calcareous raw material and calcium oxide and/or calcium hydroxide are added in contents of 1-50 wt.% and 1-50 wt.% in terms of CaO respectively and that coating with a surface characteristics modifier is performed in rolling treatment. The absolute dry specific gravity of the artificial aggregate is 0.5-1.5.</p> |
