Why fineness test of cement is done?

Why fineness test of cement is done?

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.

How is fineness modulus of cement calculated?

The Fineness modulus of cement is an empirical figure obtained by adding the total percentage of the sample of an aggregate retained on each of a specified series of sieves, and dividing the sum by 100. The proportion of cement of which the grain sizes are larger than the specified mesh size is thus determined.

Which sieve is used for fineness test of cement?

Fineness test on cement can be determined by using 75 microns sieve.

What machine measures the fineness of cement?

Appartus used for fineness test of cement is 90µm IS Sieve, Weight Balance having capacity 10mg to 100g, Nylon or pure bristle brush and sieve shaking machine (optional).

What is meant by fineness of cement?

Fineness of cement is another quality control parameter that experts keep in check of at the laboratory. The size of the particles of OPC impact the surface area and the heat of hydration. I’ve already explained the definition in my previous article on different physical properties of cement.

What is FM value?

The Fineness Modulus (FM) is an empirical figure obtained by adding the total percentage of the sample of an aggregate retained on each of a specified series of sieves, and dividing the sum by 100. Sieves sizes are: 150-μm (No. 100), 300-μm (No.

Which apparatus is used for fineness?

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.

Is sieve 90 micron?

All Answers (5) 90 micron sieve is having aperture size 90 micron. To determine fineness of cement 100 gram of cement is taken on sieve screen and sieving operation is done carefully without pressing cement particles on screen. After sieving, the coarser particle left on screen is called residue.

What is sieve analysis test?

A sieve analysis (or gradation test) is a practice or procedure used in civil engineering and chemical engineering to assess the particle size distribution (also called gradation) of a granular material by allowing the material to pass through a series of sieves of progressively smaller mesh size and weighing the …

What is the range of fineness modulus?

Fineness modulus of fine aggregate varies from 2.0 to 3.5mm. Fine aggregate having fineness modulus more than 3.2 should not considered as fine aggregate. Various values of fineness modulus for different sands are detailed below.

How many types of cement tests are there?

8 Types of Tests on Cement to Check the Quality.

What is the most important test on cement?

The most important quality tests on cement which are carried out in the laboratory are:

• Fineness Test.
• Consistency Test.
• Setting time Test.
• Soundness Test.
• Strength Test.
• Heat of Hydration Test.
• Specific Gravity Test.

What is sieve size?

Sieve sizes refers to a range of particulate diameter classifications based on the fraction of solid grains present in a material or metal sample. Sieve size analysis is used to carefully confirm the granular profile of protective material applied to a metal’s surface to safeguard it against corrosion.

What is ASTM sieve number?

ASTM Test Sieves come in several diameters: 3in (76mm), 6in (152mm), 8in (203mm), 10in (254mm), 12in (305mm), and 18in (457mm) and full or half-height frames with different sieve sizes for a wide range of particle sizes. 12in Sieves also have an option for an Intermediate Height Frame.

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.