Grog

Clay used for making bricks must be mixed with fine-grained inert material to prevent cracking during drying and firing. Normally, sand is used, but grog, crushed fired brick, can serve the same purpose. I crushed some of the leftover tiles that we made in April and mixed them into a test batch of clay. I don't think this is a viable option for all the bricks due to time constraints, but it is good to know that all the materials for the brick itself can come from the same site.