tile adhesive

PO42.5 Cement 400 40--70mesh sand 500 70--140mesh sand 100 Redispersible Polymer powder 9kg PVA2488 plus 1kg No starch ether added Calcium formate 3kg HPMC 200,000 viscosity 3 kg

The customer requires swimming pool tile adhesive without saltpetering. The formula given by the manufacturer is to add a moisture repellent to the ordinary tile adhesive formula. Is it helpful?

Formula is like below(unit:kg) 425 cement:350, calcium carbonate powder:50, 40~70 mesh sand：350， 70~140 mesh sand：250， Wacker 5044n：12， HPMC 4W：3， starch ether：0.3, water reducing agent:0.3, Calcium Formate:0.3

I bought tile adhesive for home decoration. After stirring, the surface of the slurry became densely packed and began to shrink like defoaming. Has anyone ever encountered this problem? Who knows the reason? I appreciate.

For mixing tile adhesive, is the finer the sand, the better? Will the wall with tile adhesive crack if the customer adds additional cement?

425 350 90 mesh 600, stone powder 50, Wacker 6, 150,000 cellulose 2, starch ether 0.5, wood calcium carbonate 1, the sand is dolomite machine-made sand. I put the soaked bricks on for twelve hours, and the bricks can still be peeled off. The grout inside has not dried. Please give me some advice.

What is the role of calcium formate in tile adhesive?

How to increase the open time of tile adhesive to 30 minutes?

Cement 280，coal ash 70， graded sand 635， cellulose ether 2.5 Starch ether 0.5， early strength agent 4， redispersible polymer powder 8 Water addition 24.5%， temperature 27℃， humidity 55% The formula is as above: the original strength is 1.5, the freeze-thaw strength is 1.0, but the open time is...