| 摘要 |
PURPOSE: Provided is a method for manufacturing gravels with high strength, waterproofness and low cost by using yellow earth and waste oil. CONSTITUTION: The gravels applied to bricks and walls are manufactured by mixing yellow earth, fired waste gypsum and gypsum in a ratio of 8 : 1 : 1, adding waste oil until small lumps form, solidifying, and putting the lumps in and out the cement water several times. Also, the gravels applied to interiors are manufactured by mixing yellow earth and fired waste gypsum in a ratio of 8 : 2, adding waste oil until small lumps form, solidifying, and putting the lumps in and out the gypsum water several times.
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