What is a tile grout ingredients?
If the question is "WHAT" is
Cement, Sand, water & if you want color then some Pigments
It depends on the type of tile you have. If the tile is unglazed and porous (as mostly all travertine is) then you will need to seal the tile before you grout it so that the grout does not soak into the tile and cause it to become dull. Follow the manufacturers recommendation for the tile that you have.
The obvious answer is sanded grout has sand. But the in depth answer has many differences. Sanded grout which is the most common, can be used in a grout joint from 1/8" to 1/2" (and larger but check the grout). Sanded grout scratches many tile like glass. Non sanded grout can only be used on joints 1/8" or less. Non sanded grout is typically seen on marble and granite tile, many wall tile, and all…
You should only use a mild soap and water solution for cleaning grout on floor tile. If it was properly sealed this should work fine. If it was not sealed and the dirt has worked its way down into the grout, you can either use a grout renew which is sort of like a paint for grout, or you will have to have the grout replaced.