Air permeability method :- Air permeability apparatus (Blaine type) is used to determine the fineness of cements, pozzolanas and other powdery materials. It use ‘Specific area’ method. Air content method :- This method covers the determination of the air content of freshly mixed concrete. Le chatetior method :- It used to determine the soundness of cement. Vicat’s apparatus :- Vicat apparatus is designed to determine the initial and final setting time of cement.