After autoclaved sand-lime brick out of the kettle temperature, humidity reduction and carbonization, in the course of the general trend is the volume shrinkage. Shrinkage variation is: the first three days of the vessel after the maximum contraction, average value of daily shrink 0.019mm / m; 3 ~ 30 Day Average daily shrinkage is 0.005mm / m; 30 days later the average daily value of contraction 0.003mm / m; in about 60 days, light brick, the average daily value of less than contraction 0.001mm / m, until it is stable. ① frost resistance: refers to the ability to resist repeated freezing and thawing brick effect. Autoclaved sand-lime brick production if required to meet product standards, light brick, can withstand frost resistance test, autoclaved sand-lime brick frost resistance related to its own strength, light brick, high strength by frost Good. ② Water resistance: after effects include dry and wet cycles and changes in their strength when long-term immersion in water, the wet-dry cycle effects or long-term water autoclaved sand-lime brick compressive strength are on the rise. ③ water absorption: Compared with the sintered common brick, water absorption rate and Bricks close.