1. What are the requirements for plastering mortar?

Answer: Plastering mortar is required to have good workability and be easy to spread into a uniform and smooth thin layer for easy construction. It should also have high adhesion. The mortar layer should be able to bond firmly to the bottom surface. It will not crack or fall off for a long time. It is in a humid environment or in a position susceptible to external forces (such as the ground, wall skirts, etc.). It should also have high water resistance and strength.

2. What are the main functions of ordinary plastering mortar?

Answer: The function of ordinary plastering mortar is mainly to protect the wall and the ground from erosion by wind, rain and harmful impurities. Improve moisture resistance, corrosion resistance, weathering resistance, and increase durability. At the same time, it can make the building achieve a smooth, clean and beautiful surface.

3. What is plastering mortar? According to the different architectural functions of it, what categories can it be divided into?

Answer: All mortars applied to the surface of buildings or building components are collectively referred to as plastering mortar.
According to the different functions of the plastering mortar, it can be divided into ordinary plastering mortar, decorative mortar and plastering mortar with certain special functions (such as waterproof mortar, insulation mortar, sound-absorbing mortar, acid-resistant mortar, etc.).

4. How many layers are usually divided into for ordinary plastering mortar? What are the different functions and requirements of each layer of mortar?

Answer: Ordinary plastering mortar is usually divided into two or three layers for construction. The requirements of each layer of mortar are different, so the mortar selected for each layer is also different.
Generally, the bottom mortar plays the role of bonding the base layer. The mortar is required to have good workability and high bonding strength. Therefore, the water retention of the bottom mortar should be good. Otherwise, the moisture is easily absorbed by the base material and affects the bonding strength of the mortar.
A rough surface of the base is conducive to bonding with the mortar.
The middle layer of plastering is mainly for leveling, and sometimes it can be omitted. The surface plastering is mainly for flatness and beauty, so fine sand should be selected.

5. How should the bottom plastering be used for brick walls, lath walls or lath ceilings, concrete walls, etc., as well as places that are prone to collision or moisture?

Answer: For the bottom plastering of brick walls, lime mortar is mostly used.
For the bottom plastering of lath walls or lath ceilings, mixed mortar or lime mortar is mostly used.
For the bottom plastering of concrete walls, beams, columns, top plates, etc., mixed mortar, hemp lime mortar or paper tendon lime mortar is mostly used.