Please help with the mortar ratio in the polymer waterproof mortar formula

[William]

42.5 cement:310
40-70mesh sand: make up the remaining weight
0--140mesh sand:240
flyash:80
cellulose ether:7.5
viscosity:3
starch ether:1
wood fiber:2
Redispersible Polymer powder:15
antifoaming agent:2
moisture repellent:2-4
water reducing agent: based on the experiment test
PP fiber:2

 

[Johnson]

A very solid formula, I think there aren’t any problems.

 

[Shamil]

There is less cement but more cellulose; remove the starch ether.

 

[Chanliss]

I have never done such a formula for waterproof mortar, but it is not good enough—too many thickening purpose agents. Even though you add water reducing agent, it is not helpful since making it waterproof with such a small amount of Redispersible Polymer powder is difficult.

 

[Cassie]

Good formula; just gives a thought to flexibility. Construction, sagging, and crack resistance in the later stage are fine. Hydrophobic agents, starch ether, and antifoaming agents can use at the minimum amount.