What are the sizes of ancient blue bricks?

The standard size of clay brick in China is 240× 1 15×53mm, and the mortar joint thickness of masonry is 8 ~ 10 mm, which is exactly 4 bricks long, mortar joint 1m, 8 bricks wide and mortar joint 1m,/kloc-0. The modulus is very good, so it is called "standard brick". 4×8× 16=5 12 (block). How many bricks per cubic meter are needed for masonry? 5 12 standard brick? (Mortar dosage: 1-0. 24×0。 1 15×0。 053×5 12=0。 748 cubic meters). The modulus and size of other bricks are also based on this idea.