How is fineness of cement calculated?
Fineness = (W2/W1) * 100 Then, calculate the percentage of Weight of cement–retained on Sieve. Repeat this procedure with three different samples of cement and average the values for accurate results.
Why 90 micron sieve is used in fineness of cement?
The weight of cement whose particles size greater than 90 microns is determined and the percentage of residue retained cement particle on 90 micron sieve are calculated. This is known as Fineness of cement. We know that cement hydrates when cement is mixed with the water and a thin layer are formed around the particle.
Is code for fineness test of cement?
FINENESS OF CEMENT BY DRY SIEVING (IS:4031-Part 1-1996)
What is the size of fineness of cement?
Fineness of Cement is measured by sieving cement on standard sieve. The proportion of cement of which the cement particle sizes are greater than the 90 micron is determined.
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.
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 fineness limit?
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 is fineness modulus formula?
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. 50), 600-μm (No. 30), 1.18-mm (No.
What is a good fineness modulus?
Values of Fineness Modulus of Sand 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.
How many mesh is cement?
The percentage residue left on screen of 90 micron sieve is called Fineness of cement. Same procedure can be adopted for marble powder.
Which equipment is used to test the fineness of cement?
Fineness test is performed on the Blaine apparatus. It is practically a manometer in the U-tube form. One arm of the manometer is provided at the top with a conical socket to form an airtight fit with the conical surface of the cell.