What is Blaine fineness?

What is Blaine fineness?

The fineness of a powdered material, such as cement, as determined by the Blaine apparatus; usually expressed as a surface area in square centimeters per gram.

What is Blaine size?

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.

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 in cement industry?

The Blaine of cement refers to the fineness of its particles and is expressed as (m2/kg) Low heat cement might would typically have a Blaine of 250 m2/kg while standard Portland cement (CEM42. 5) could have a Blaine in the range of 300–350 m2/kg and rapid hardening cement (CEM52.

Is the Blaine fineness test a true measure of cement fineness?

It is truth that the Blaine surface area method is not the best to determine fineness of others powders materials than Portland cements. This method was developed to measure cement fineness and the surface specific area is calculated taking into account the regular shapes of cement particles as a spherical shape.

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].

What is Blaine air permeability method?

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 Blain no?

What is cement fineness?

The fineness of cement is a measure of the size of particles of cement and is expressed in terms of the specific surface area of cement. The fineness of cement is measured as the % weight retained on a 90µm IS sieve over the total weight of the sample.

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.

How do you determine the fineness of cement by air permeability method?

Fineness of cement affects hydration rate hence the rate of strength gain. The smaller the particle size, the greater the surface area-to-volume ratio, and thus, the more area available for water-cement interaction per unit volume.

Why is the Blaine air permeability test important?

Conclusion: Blaine air permeability test of cement is important since it gives an idea of the size of smaller grains of the particles which play a major role in the process of hydration and strength development of the cement.

How is the fineness of a cement particle determined?

A Fineness of Cement is Measure of the size of Cement Particle, and it is described in terms of the specific surface area of Cement particle. The Fineness of cement can be Calculated by particle size analysis, by using the air permeability method, by using sedimentation method.

How to determine the fineness of cement by Wagners turbidimeter test?

Aim: To determine the fineness of cement by Wagner’s turbidimeter test. Apparatus: Beaker, kerosene, light bulb, photoelectric cell. Initially clean the beaker with a dry cloth. Then add kerosene in the beaker. Add cement in the beaker and stir it well. Due to which the turbidity of kerosene increases.