classification of aggregates, sand | 3rd sem | lecture,fineness modulus of aggregate (sieve analysis) it is a numerical index, which gives a general idea about the coarseness ( mean size of aggregates) it doesn’t provide any information regarding particle size distribution in the sample of aggregates. it is calculated by using the formula as : fineness modulus = cumulative % retained on each sieve / 100.classification of aggregate - classification based on size,the fine aggregates can be classified as coarse, medium and fine sands based on the fineness modulus. fine sand - fineness modulus of 2.2 to 2.6. medium sand - fineness modulus of 2.67 to 2.9. coarse sand - fineness modulus of 2.91 to 3.2. according to particle size distribution, is: 383 -1970 has divided the fine aggregate in to 4 grading zones..
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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.
fineness modulus of sand (fine aggregate) is an index number which represents the mean size of the particles in sand. it is calculated by performing sieve analysis with standard sieves . the cumulative percentage retained on each sieve is added and subtracted by
what is fineness modulus of aggregate? the fineness modulus of aggregate is simply a measurement of the average size of the aggregate. it can be calculated with the help of different sizes of the sieve. now, let us see some numerical examples to calculate the fineness modulus of aggregate.
fineness modulus of grading of aggregate. fineness modulus is an empirical factor computed from the sieve analysis. it is defined as the sum of the cumulative percentages retained on the sieves of the standard series ranging from 80mm to 150microns and dividing the sum by 100.
example calculation of fm of fine aggregate order by phone: 800.444.1508 / 740.548.7298 • order online: www.globalgilson.com test sieve sieve opening
fineness modulus (fm) of aggregate is an inde number used to indicate the average size of particles in aggergates . the fm is found as sum of cumulative % (c%) of the masses of aggregate retained on a set of is sieves ( 80 mm ,40 mm,20 mm,10 mm,4.75 mm,2.36 mm,1.18 mm,600 micron,300 micron,and 150 micron.) and divided by one hundred . mathmatically,
the fineness modulus is used in us practice and is a measure of the grading of fine aggregates. it can be calculated from a sieve analysis by adding the cumulative percentages of fine aggregates retained on the following sieve sizes; 0.15mm, 0.30mm, 0.60mm, 1.18mm, 2.36mm and 4.75m. this value is then divided by 100 to give the fineness modulus.
surface area ∝ 1/(fineness modulus) larger value of fm is preferred for fine aggregates. for a good fine aggregate, the fm should be between 2.3 and 3.1 (astm range for fine aggregates). a fm of 4 can be interpreted to means that the fourth sieve from bottom i.e. sieve no. 16 is the average size of the aggregate particles in the given sample.
fineness modulus is an empirical factor obtained by adding the cumulative percentages of aggregate retained on each of the standard sieves ranging from 4.75 mm to 150 micron and dividing this sum by anarbitrary number 100. finess modulus, fm = (total of cumulative percentage of passing (%) /
fineness modulus. fineness modulus is an empirical factor obtained by adding the cumulative percentages of aggregate retained on each of the standard sieves ranging from 80 mm to 150 micron and dividing this sum by 100. fineness modulus is generally used to get an idea of how coarse or fine the aggregate is.
based on the practical experience, the fineness modulus of fine aggregate should be between 2 to 3.5 and of coarse aggregate between 3.5 to 8. usually, the fineness modulus is calculated for fine aggregate rather than for coarse aggregate.
excel sheet for sieve analysis of aggregate and to calculate fineness modulus. for any type of mix proportioning sieve analysis results and fineness modulus is required. here is the excel sheet which includes calculations of fineness modulus. hope it will consume less
empirical factor called the fineness modulus is, often used as an index of the fineness of aggregate, a very important factor when making selection for a source/type of fine aggregates. the fineness modulus is computed from screen analysis data by adding the cumulative percentages of aggregate retained on each of a specified series of sieves, and dividing the sum by 100.
what is fineness modulus of aggregate? fineness modulus is an empirical factor obtained by adding the cumulative percentages of aggregate retained on each of the standard sieves ranging from 80 mm to 150 micron and dividing this sum by 100.
what is fineness modulus?? fineness modulus are ready index of coarseness or fineness of the material. it is also defined as an empirical factor obtained by adding the cumulative percentage of aggregate retained on each of the standard sieves ranging from 80mm to 150micron and dividing the sum by an arbitrary number 100.
fine aggregate gradation • fineness modulus (fm) should be between 2.3 and 3.1 • fm is empirical # determined by dividing the sum of percent retained on a standard series of sieves by 100 (no. 4, 8, 16, 30, 50, 100) • coarser fine aggregate has a higher fm sieve percent passing 3/8 in 100 no. 4 95-100 no. 8 80-100 no. 16 50-85
1) sieves - for coarse aggregates 15 in. x 23 in. or 14 in. x 14 in. screens are recommended with sieve designations 2 in., 1 1/2 in., 1 in., 3/4 in., 1/2 in., 3/8 in., no. 4, no.8 and pan. for fine aggregates 8 in. round sieves are standard with sieve designations 3/8 in., no. 4,
fineness modulus is generally used to get an idea of how coarse or fine the aggregate is. more fineness modulus value indicates that the aggregate is coarser and small value of fineness modulus indicates that the aggregate is finer. fineness modulus of
the fineness modulus (fm) of aggregates can be an intimidating term, but it’s just an empirical value that describes the average size of particles in a sample of aggregate. this factor provides a basis to select estimated proportions for concrete mix design, but its real influence is not always understood.
fineness modulus of fine aggregate txdot designation: tex-402-a effective date: august 1999 1. scope 1.1 this method determines the fineness modulus of concrete fine aggregate used in evaluation of natural and manufactured sands for portland cement concrete. 1.2 the values given in parentheses (if provided) are not standard and may not be exact
the fineness modulus of fine aggregate is in the range of. a. 2.0 to 3.5. b. 3.5 to 5.0. c. 5.0 to 7.0. d. 6.0 to 8.5. answer: option a.
let “ x ” is the percentage of fine aggregate to be combined with coarse aggregate. x can be calculated using the formula given below. x = [ (f2-f)/ (f-f1)]*100. where, f1 = fineness modulus value of fine aggregate. f2 = fineness modulus value of coarse aggregate. f = fineness modulus value of combined aggregate.
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
for fine aggregate, natural sand was used, having a maximum size of 4.75 mm. its specific gravity was 2.72, conforming to zone-iii, and having a fineness modulus of 2.313. coarse aggregates used in this study were of 10 mm nominal size, having a specific gravity of 2.72.