Environmental reasons for cracks in external wall insulation mortar
Deformation caused by deformation of wall structure: uneven spacing of the foundation is too large, and the distance between the wall and the corner of the brick wall is not increased, the door and window openings are too large, and the deformation joint is improperly set, which makes the wall strong, rigid and stable. Deformation of the structure causes structural deformation cracks, resulting in cracking of the mortar layer.
The role of polycarboxylate superplasticizer in mortar and concrete
The water reducing agent can mainly improve the strength of the mortar. It is an admixture with water reducing and reinforcing effects without affecting the construction workability of the mortar and concrete. Polycarboxylate water reducing agent is a new type of high performance water reducing agent developed in recent years, which has excellent water reducing rate, fluidity and permeability. The strength of the cement mortar is obviously enhanced, but the production process is complicated and the price is slightly higher than other water reducing agents. The water reducing agent has many functions, and is divided into an air-inducing type water reducing agent (a water reducing agent which also acts as a bleed air),