It's common to use recycled concrete as controlled fill, but it is crushed to about 3/4". You can use the brick too, but it must be crushed as well. Otherwise you risk future settlement.
Recycled concrete is not generally recommended where there is a high water table because the concrete will...
This rig has no plug & the stem is not water tight, so ground water enters it to the table elevation +/-. Both the driller and the engineer on site said that they did not see evidence that the soil "ran" up the stem when they advanced the spoon for the spt, indicating that the soil was not...