This morning, we created a jig to help us slice up concrete blocks using our large mains powered angle grinder fitted with a diamond coated cutting blade. We put several chunks of timber and OSB pieces together, to form a fence with a ruler attached to it, plus a right-angle flat surface using a piece of plywood to guide the machine at close to 90degree as possible.
Block-cutting-jig-1
Block-cutting-jig-2
The angle grinder and the blade was able to cut fairly easily through just over half way through the 100mm thick concrete block and just turning the block over, we could slice quite neatly a block to a given size.