Hydrophobic Cement:

The hydrophobic cement contains admixtures that decrease the wetting ability of cement grains. The hydrophobic admixtures such as oxidized petrolatum, acidol, etc. form a thin film around cement grains. When water is added to hydrophobic cement, the absorption films are torn off the surface and they do not in any way prevent the normal hardening of cement. Within initial stage the gain in strength is less as hydrophobic films on cement grains prevent the interaction with water. The strength of hydrophobic cement after 28 days is equal to that of OPC.

The below given are the uses of hydrophobic cement:

(a)        It is used within the structures whereas high frost resistance or water resistance is required.

(b)       It is used within humid places where storage of OPC causes deterioration in the quality of cement.