Here is a great way to get rid of those pesky weeds that grow in your brick patio. The best part is you don't have to use harsh chemicals and you can get a great upper body workout at the same time :)
Here are my crazy jungle weeds
Throw sand on them. I'd say, the more you put the easier it will be.
Now push the brick across until the weeds are gone!
In the end sweep it all up and your done. Hope this helps :)