What is the frost and lime explosion of fired common bricks?
The impact of lime spalling on brick masonry is very great. The light affects the appearance and shortens the service life, and the weight of the masonry will be reduced or even destroyed. The larger the lime particles in the bricks, the more the content of bricks, the more influence on the strength of the brick masonry.
When frost covered bricks are used in damp parts of buildings, the dissolution and crystallization expansion of a large number of salts will cause the surface of brick masonry to become pulverized and flaking, and the internal porosity will increase and the frost resistance will decrease significantly.
Frosting refers to the soluble salts (such as sodium sulfate) in the raw material of clay, and the salting out phenomenon produced on the brick surface with the evaporation of water in the bricks, usually white powder, often forms floc like spots on the surface of the bricks.
The raw material of brick contains soluble salt. During the process of using brick, salt (usually white powder) is produced on the brick surface with the evaporation of water. This is called "Pan frost".Brick raw materials containing limestone, brick is roasting limestone into lime brick in calcination will, for the time of burnt lime limestone, the limestone will absorb the moisture in the brick, digestion and volume expansion, resulting in destruction of brick expansion, this phenomenon is called lime burst.
