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.

What is Blaine air permeability apparatus?

Blaine Air Permeability Apparatus. 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 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 is Blaine number?

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].

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 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. Features: Used for testing in accordance with AASHTO and ASTM standards.

Why Vicat apparatus is used?

Vicat apparatus is generally used to determine the required quantity of water to produce a cement paste of normal or standard consistency. It is also used in the tests for initial setting time of cement or concrete and final setting time of cement or concrete.

What is Blaine No?

What is cement fineness?

The fineness of cement is a major factor influencing its rate of hydration since the reactions involved occur at its interface with water. The finer the cement particles and the greater its surface area, the faster is the rate of hydration and the greater is the proportion of the cement which reacts within the paste.

How do you calibrate a Blaine apparatus?

Make at least two determinations of the bulk volume of cement. Average the two (2) values. Use the average value as the volume of cell in future test. Record the temperature before the test and at the end of the test, place the thermometer in the vicinity of the determination.

How do you use Vicat apparatus?

Tap the mould to remove any bubbles of air. Place the mould along with the plate under the rod and plunger attached with the apparatus. Lower the plunger gradually till it touches the surface of the mould and then releases it quickly.