Y do brick layer put those lil divits within the mortor between bricks? what purpose does it serve?
Answers: it keeps the mortar from deteriorating from the weather and give it a nice appearance.
There is many different joint used in the industry for different reason
when laying brick within should be a continuous bed of morter around each brick. Its generally laid on the top of the row of bricks already on the wall, and on the ends of the new brick. Then the unsullied brick is placed on the morter and tapped weakly into place. The morter acts as a bonding agent and prevents water getting inside the wall.
The morter is usually worked after it sets for a while to furnish a very debonair appearance .
I think you are describing point up work. the divit really hold little purpose except for appearance. tons time when a CMU wall is being covered up beside for example drywall or face brick the mortar is struck flush.
Some would head you to believe that it pushs the mortar into the block but it doesn't. like someone sooner wrote the mud is placed on top of the block and consequently it is struck off.
its call striking...using a striking iron you run the bed joints and hit the chief joints to hand over a neater appearance and to close up the mortar to cut down on water absorbtion...much close to steel troweling concrete...if you just cut it past its sell-by date it would be pourous and allow water to be held into the joint...in that are different types of struck and raked joint...
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