Please help me check if there are any problems with the formula of anti-crack plaster. Please give me some advice.

[Luis]

PO425 cement 350 kg,
40-70 sand 250 kg,
70-100 mesh sand 400 kg,
redispersible polymer powder 4 kg,
cellulose ether 2 kg,
wood fiber2 kg,
short fiber 1.5 kg,
starch ether 0.4 kg, 2488 1 kg.

The sand used is 70-100 mesh and 650 kilograms in second formula. Could you please help me find out what needs to be improved?

 

[Scott Kaplan]

If all use 70-100 mesh sand, will there be any possibility of cracking later?

 

[Cassie]

This formula is really a bit complicated, just redispersible polymer powder, cellulose ether, and wood fiber.

 

[Ankur]

Cement 350, sand 640, cellulose ether 2.5kg, propylene 1kg, redispersible polymer powder 8kg. Here is the simple and cost-effective formula.

 

[Johnson]

cellulose ether 2.5 is too small.

 

[Rony]

The formula is not a big problem. Whether the cellulose ether is enough and whether it cracks or not extensively impacts the raw materials, environment, substrate, and construction in the later stage. Just fine-tune the details later.

 

[Roy]

Either no redispersible polymer powder is added or more is added. 4 kilograms is meaningless.

 

[Alex]

There is no big problem with this recipe.

If you want to make small adjustments, you can use redispersible polymer powder 6 if you don’t mind.

The lower limit of cellulose is 2 kilograms of high-purity products, and it is recommended to have 2.5 in hot weather.

 

[Allen]

When the weather gets cold, reduce or even eliminate the wood. The purity of the cellulose is no problem. Even 2 kilograms will be fine this autumn.