Does it matter if there is no steel bar on the carbon residue used to fill the toilet?

At present, the backfill material is generally ceramsite, which has certain water absorption and low density. Because of its oval shape, there will be some sliding phenomenon between ceramics. If the steel wire mesh is not laid, the cement mortar will be directly applied to the ceramsite, and the cement mortar is likely to flow into the gaps between the ceramsites.