| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of recycling defective roof tile disposed as a defective product due to the dimensional accuracy, the deformation, firing unevenness, incorporation of foreign substances in the ceramic roof tile production process as concrete aggregate by properly crushing the defective roof tile. SOLUTION: The defective roof tile having small water absorption in the defective roof tile of the industrial waste discharged from a roof tile plant is crushed to have small sharp or projecting parts and to have a rounded shape, adjusted to have a fixed particle diameter and used as the concrete aggregate. A lightweight concrete product easily transported and worked, free from receiving freeze damage and having excellent wear resistance and weather resistance is obtained. COPYRIGHT: (C)2008,JPO&INPIT
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