What is Blaine in cement?

1. n. [Drilling Fluids] The particle size or fineness of a cement in cm2/g or m2/kg, usually determined from air permeability tests using a device known as a Blaine permeameter. Fineness affects the hydration rate (setting) and the requirements for the amounts of water, retarder, and dispersant.

What is unit of Blaine?

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 fineness 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.

How is Blaine of cement calculated?

FINENESS OF CEMENT BY BLAINES AIR PERMEABILITY METHOD (IS-4031-PART-2)

  1. Measuring instruments.
  2. V = (M1-M2)/D,
  3. i.e. W = (1-e)ρV.
  4. or W = 0.500ρV.
  5. IS:4031(Part-2):1996-Method of physical tests for hydraulic cement(Determination of fineness by Blaine air permeability method)

What is Blaine value?

The Blaine value is a standardized measure for the degree of fine grinding of cement . It is stated as the specific surface area (cm 2 / g) determined in a laboratory using the Blaine device . Standard Portland cement CEM I 32.5 has a Blaine value of approximately 3000 to 3500.

Is code for Blaine apparatus?

Blaine Air Permeability Apparatus: Conforming to IS 5516 (1996).

What is Blaine number?

A Blaine number is the surface area-based parameter that is quantified with the use of the air permeability method. The technique is well-established in the cement industry. However, it has several widely recognized and important limitations.

Which unit is used to measure fineness of cement in Blaine apparatus?

An automatic Blaine apparatus is a piece of equipment that is used to measure how fine powdery products are such as cement. The fineness is measured and expressed as total surface area in square centimeters per gram.

What is cement fineness?

The fineness of cement has an important bearing on the rate of hydration and hence on the rate of gain of strength and also on the rate of evolution of heat. Finer cement offers a greater surface area for hydration and hence faster the development of strength. The fineness of grinding has increased over the years.

What is Blain in iron ore?

Optimum Blaine fineness of iron ore in the range of 1700–2250 cm2/g is usually used for good quality pellet making. However, when a material of high Blaine fineness is produced after beneficiation and there is no option to control the fineness, the pellet making from high Blaine fineness ore becomes obligatory.

Why steel is used in RCC?

It is because the two materials bond together very well with no slippage and thus act together as one unit in resisting the applied loads, apart from few other important properties of steel. The tensile strength of steel is approximately equal to 100 – 140 times the tensile strength of plain concrete mix.