| 044422 Sub-grade block works
Sub-grade block works shall be built in class AA hollow block walls or class AA solid block walls and cement mortar only.
044423 Above grade walls.
Walls above grade shall be built in blocks of the class and cement or compo-mortar as indicated on drawings or in the bill of quantities. Walls shall be built with selected blocks. The horizontal and vertical joints of blocks shall be raked out to form adequate key for block work on which further finish is to be applied.
The joints for fair faced block work shall be raked out to a minimum depth of 10mm and prepared for cement pointing.
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