What is Blaine fineness?
the fineness of powdered materials such as cement and pozzolans, expressed as surface area per unit mass usually in square meters per kilogram, determined by the Blaine apparatus. (See also specific surface.)
What is Blaine method?
Blaine’s method is based on the fact that the air permeability of a packed bed of particles is proportional to their fineness and therefore the SSA. The value measured during testing is the time required to pass a certain volume of air through a packed bed of solids with given size and porosity.
How is Blaine measured?
The Blaine Fineness Apparatus is used in measuring the fineness of Portland cement in accordance with ASTM and AASHTO standards. The fineness is measured in terms of the specific area of cement expressed as total surface area in square centimeters per gram.
What liquid is Blaine apparatus?
MA-13 Blaine Air Permeability Manometer Fluid is a non-mercury red spirit indicating fluid used with the MA-10 Blaine Air Permeability Apparatus in determining the fineness of Portland Cement. The 8oz (240ml) bottle is available as a refill.
Which apparatus is used for fineness?
Fineness of cement is tested in two ways : (a) By sieving. (b) By determination of specific surface (total surface area of all the particles in one gram of cement) by air-permeability apparatus. Expressed as cm2/gm or m2/kg. Generally Blaine Air permeability apparatus is used.
What is Blaine No?
The softness of mineral is usually expressed by the specific surface defined as the total surface area of particles in cm2 per gram or m2 per kg cement, which is known as “Blaine number” [6-8]. This method can be used to measure the softness degree of various materials, including iron [6].
What is Blaine test?
Blaine Air Permeability Apparatus is used for determining the fineness of Portland Cement measures the specific surface area of fine materials in square centimeters per gram of test sample. By using this apparatus, a quantity of air is drawn through a bed of definite porosity.
What is the maximum value of fineness of cement?
Result: The standard value of fineness of cement should have fineness less than 10 % or fineness of cement should not be more than 10% as per IS Recommendations.