OPTIMAL CALIBRATION AND EMPIRICAL LIKELIHOOD METHODS IN SURVEY SAMPLING

An additive to cement based materials to render the materials self-leveling upon being mixed with water and applied as a coating upon a floor substrate. The additive comprises a formaldehyde based resin, preferably melamine formaldehyde, and a water retention agent, preferably xanthan gum alone, hydroxyethyl cellulose alone, or a combination thereof.