Construction and maintenance of real stone paint plastering layer of external wall [Constructionist must see]

1 Surface treatment

Dust cleaning of the base surface -> water in advance-soak the base surface with water -> drop the pulp and pull the hair -> standard curing for one week -> dry (more than one week) -> water the base surface one day in advance- >Plaster mortar construction——>cut joints or reserve expansion joints——>standard maintenance for one week——>dry for more than one month

2About the thickness of the mortar

The suitability of the plastering layer mortar is generally divided into two passes, the first pass is about 3mm, and the total thickness is about 7mm.

3About smashing and pulling hair

After the pouring body or masonry is completed, the grout should be thrown as soon as possible, so that the sufficient drying time can generate sufficient strength.

4About maintenance

After the construction of the plaster layer, if the moisture loss is too fast, cracks are easy to occur, especially when its strength is not fully formed.
These cracks greatly damage the tensile strength of the plaster layer and damage the plaster layer.
Waterproof and anti-permeability, which will also lead to the increase of drying shrinkage and damp expansion of the plaster layer in the rainy season and high humidity conditions.
Therefore, the maintenance work is very important to prevent the pouring concrete and the plaster layer mortar from cracking.
At the same time, Keeping the moisture in the plastering mortar can also speed up the formation of the initial strength of the plastering mortar .
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5About the one-month drying period of mortar

The hollowing phenomenon that may occur in the plastering mortar layer within 40 days will have an obvious manifestation.
Whether it is a slight or serious hollowing phenomenon, it should be knocked out and re-construction.
The temporary slight hollowing phenomenon will continue to develop in the future.
Severe hollowing phenomenon.
If the cracks on the plastering surface reach 2 per square meter, it indicates that there are serious errors in the plastering construction.
At this time, we should consider adding an elastic anti-cracking buffer layer to the synthetic resin imitation curtain wall system; at the same time, the cause of the cracks should be investigated.
If the cracks will continue to develop, consider increasing the thickness of the elastic buffer layer.
If necessary, knock off the plastering layer, and lay steel mesh (ф4-8, mesh center distance 160mm*160mm-180mm) to the edge of the grid.

If the imitation curtain wall is constructed within a short time after the plastering layer mortar construction is completed, the condition of the base surface will not be grasped, and the construction will be very blind.

6 Mixing ratio of plastering mortar

Generally 1:23; generally use ordinary cement no less than 425.

When constructing imitation curtain wall effect, lime mortar or cement-lime mixed mortar cannot be used as plastering material.

Portland cement and ordinary Portland cement are suitable.