Ordinary plastering mortar is the largest amount of plastering mortar used in construction projects. Its function is mainly to protect the wall and the ground from the wind and rain and harmful impurities, improve the moisture, corrosion and weather resistance, increase the durability; at the same time, the building can achieve a smooth, clean and beautiful surface.
The plastering mortar is usually divided into two or three layers for construction. The mortar requirements vary from layer to layer, so the mortar used for each layer is different. Generally, the bottom mortar acts as a bonding base layer, and the mortar should have good workability and high adhesion. Therefore, the water retention of the bottom mortar is better, otherwise the moisture is easily absorbed by the base material and affects the adhesion of the mortar. The rough surface of the base layer is beneficial to the bonding with the mortar. The middle plaster is mainly for leveling, and sometimes it can be omitted. The surface plastering is mainly for the sake of smoothness and beauty, so fine sand is used.
Used for the bottom layer plastering of brick walls, mostly with lime mortar; for the bottom layer plastering of slat wall or slat roof, mixed mortar or lime mortar; for concrete wall, beam, column, roof and other bottom screed multi-purpose mixed mortar, hemp Knife lime slurry or paper gluten lime slurry.
In areas that are prone to collision or humidity, cement mortar should be used. Such as wall skirts, skirting boards, floors, canopies, window sills, pools, wells, etc., generally use 1:2.5 cement mortar.
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