There’s no way this is cheaper than concrete. Unless it’s subsidized in some way — perhaps people paying a premium for the bricks to meet some ‘green’ building

There’s no way this is cheaper than concrete. Unless it’s subsidized in some way — perhaps people paying a premium for the bricks to meet some ‘green’ building standard — this isn’t a viable business. Who knows, though? Maybe the lower weight makes it attractive. You could probably accomplish the same green goals and make more money by shredding the plastic and mixing it with ordinary concrete... so you wouldn’t have to use as much aggregate or sand... because we all know how expensive aggregate and sand are... right? Scratching head...