Your typical meu pan is made with clean sand, portland cement and water. That’s it! Nor magic!
Don’t consider adding anything else. The basic recipe is 5 parts sand to 1part portland cement — 5:1. Some professionals prefer a richer mix of 4:1, but I’ve found that ratio hard to mix and spread. Too much cement and the mortar tends to clump as you mix it. Other pros advocate a 6:1 or even a 7:1 recipe. I think 5:1 can be considered the median of the industry. I think it’s ideal. Richer or leaner mixes do the job, though, so don’t panic if your mud is not “ideal.”
Properly smoothed and sloped, this pan is great for your tile floor. You should coat the pan with an elastomeric product like Red Gard or Dragon Shield for water proofing. Adhere the tile with THINSET.