But off ash gas can make the mortar more compaction and be propitious to the early strength of mortar.
烟气灰能使水泥砂浆的密实性提高，对水泥砂浆的早期强度有利。
2
As a kind of new type green material that saves energy, gas concrete block is apt to produce swelling, cracking or dropping. When it USES common mortar as plaster material.