This is a proposed technique where we can produce a robust and water proof bricks. Results can be achieved by mixing coal slimes and coal fines with the combination of lime and cement then followed by mixing of charge at respective grinding of its ingredients to make and build the secondary associates of different sizes like:-
6 to 5 mm / 6 to 8 percent; 5 to 1mm / 43 to 45 percent; 1 to 0.5mm, 18 to 20percent; 0.5 to 0.1 mm/ 28 to 30percent; and less than 0 to 1 mm/0.7 to 1.1 percent.

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