Plastering mortar is always low strength?

Wall plastering mortar has low strength, insufficient markings, sanding and powder removal, hollowing and cracking, unevenness.

In fact, when encountering such a problem, those construction parties who depend on plastering for food are more anxious than the owners!

However, these phenomena may not be as serious as you think if they are just superficial.

Desand and powder on the wall, of course, is caused by the low strength of the plastering mortar and insufficient markings

(It should be noted here: distinguish whether the wall mortar cracks or the main wall cracks? The main wall cracks are not included in this list)

As mentioned above, the low strength of wall plastering mortar will cause the wall to lose sand and powder

How to solve the hollowing and cracking of the wall mortar layer?

It causes hollow cracking of the mortar layer.

Hollowing of the mortar layer generally refers to the delamination phenomenon caused by the weak bonding between the base layer of the wall and the plastering mortar layer, or the lack of compactness of the plastering mortar

Repair method:

(1) Clean the floating sand and ash on the surface of the wall, mix the sand-cleaned wall de-sanding repair solution evenly, and then spray it on the wall to make the wall fully moist, preferably not to run away, moderate or severe de-sanding The plastering wall is sprayed for the second time after 30 minutes interval (the interval for the absorption of material to penetrate too fast is 10-20 minutes, the specific on-site test shall prevail)

(2) For long-term weathering, cement failure in the plastering mortar (or too low cement content), or excessive sand and soil content, such problems will affect the effect of the plastering layer.
This type of wall requires Remove the old plaster layer and re-plaster
.

Special solutions: insufficient marking of cement walls, poor hardness of plastered walls, increased wall hardness, sand and dust on walls, sand and sand on walls, sand and sand in rough houses, improved marking of cement walls, plastered walls inside and outside Change the strength of cement mortar.
The strength of cement mortar is not up to standard, and the wall is soft and sand is dropped.
Increase the strength density.
The mark of cement mortar is not low.
Solve the problem of sand and powder on the wall, sand and sand on the wall, and water on the wall.
The sand is sanded, the wall is rubbed to remove the ash and sand, the old wall is renovated, and the wall is empty and peeling
.