Fired board paving leave about 0.5cm of cement layer can be.

In the plate test paving, after the plate test paving qualified, turn over the plate, check the mortar bonding layer is flat, dense. Add mortar, pour a layer of water-cement ratio of 0.5 or so on the cement mortar layer of plain cement slurry.

Fire burnt slabs, as the name suggests, is a piece of stone slabs that are molded only after being burnt by fire, and these slabs that have been burnt by fire have an uneven surface, forming characteristic patterns.