Fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. It is calculated by performing sieve analysis with standard sieves. The cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fine aggregate.

fineness modulus of aggregate – what, why & how - civilblog.org In Todays world, Fineness modulus is not used for getting idea about fineness on material. it is also omitted from IS Code. More ever this value wont make any sense as it can get manipulated easily and it can show sand as fine but in reality its a coarse and vice a …

CRD-C104-80 Method of Calculation of the Fineness Modulus of Aggregate. 2 METHOD OF CALCULATION OF THE FINENESS MODULUS OF AGGREGATE Fineness Coarse aggregate … means of keeping quality history data on uniformity of particle-size … CHAPTER 2 SIEVE ANALYSIS AND FINENESS MODULUS Sampling. the aggregates, or water demand of the aggregate.

In the present investigations, the effect of Fineness Modulus of sand has been investigated. The Fine aggregate (Sand) taken is Yamuna river sand and coarse aggregate taken is Dolomite limestone in crushed form. It has been sorted in several categories starting the Fineness Modulus …

Fine aggregate FM's in the upper end of the spectrum, closer to 3.0, have been noted to produce concrete with good strength and workability in mixes with high cement contents. Once the fineness modulus of the fine aggregate is known, it can be used to select proportions of coarse aggregate.

Jul 11, 2015· 5 COMMON FIELD TESTS ON AGGREGATE TO CHECK ITS QUALITY ... For coarse aggregate 2 kg sample is adequate and for fine aggregate 0.5 kg sample is adequate. ... 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 ...

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 time in case of repetitive calculations. Excel Sheet For Sieve Analysis Of Aggregate And To Calculate Fineness Modulus- engineeringcivil.com

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.

Find the fineness modulus of fine and coarse aggregate for which the sieve analysis is given in the following Table Surface Index of Aggregate: In order to get good workability of mix, the importance of a good grading of coarse and fine aggregate already has been discussed.

Oct 01, 2016· 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.

Oct 03, 2018· Fineness Modulus is an indication grading of particle size. More the value of FM more coarser the aggregate is. Now because density vary with particle size, and also the void spaces inside the concrete is a function of aggregate size, it is very i...

Coarse aggregate is used to describe particles larger than 4.75 mm, and the term fine aggregate is used for particles smaller than 4.75mm. Fine aggregates contain particles in the size range 75 µm to 4.75 mm, and coarse aggregates from 4.75 to about 40 mm, except for mass concrete which may contain particles up to 150 mm.

Sep 01, 2014· Fineness Modulus of Sand Why to Determine Fineness Modulus? 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 different type of sand is as per ...

Fineness modulus estimates the proportions of aggregate in construction materials. Aggregate is inert granular material such as sand, gravel or crushed stone used to form concrete. The fineness modulus number affects the workability and finish of concrete. Before calculating fineness modulus, lab technicians pour aggregate onto sieves. Fineness ...

4.2. Based on Fineness Modulus: The fineness modulus is also considered as the indication of quality of aggregate. According to IS recommendations the aggregate should posses the F.M to the range of 2.6 to 3.2. Greater than 3.2 should be rejected. The Classification of sand based on Fineness modulus …

Find the fineness modulus of fine and coarse aggregate for which the sieve analysis is given in the following Table 4.25. Surface Index of Aggregate: In order to get good workability of mix, the importance of a good grading of coarse and fine aggregate already has been discussed.

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.The sieve sizes are 0.15 mm, 0.3 mm, 0.6 mm, 1.18 mm, 2.36 mm, 4.75 mm, 9.5 mm, 19.0 mm, 38.1 mm and larger increasing in the ratio of 2:1.

SIEVE ANALYSIS AND FINENESS MODULUS Sampling Since the reason for sampling aggregates is to determine the gradation (particle size) of the aggregate, it is necessary that they be sampled correctly. The results of testing will re" ect the condition and characteristics of the aggregate …

Jun 02, 2012· The sand is good if its fineness modulus is in the range of 2.3 to 3.1. The sand with fineness modulus less than this will be called fine sand which is not good for use. The sand with fineness modulus greater than this will be called coarse sand, which is again not good for use.

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 100 gives the value of fineness ...

The proportions between coarse and fine aggregates will change based on the unique characteristics of each aggregate, the placement method, and the finish desired. The dividing line between fine and coarse aggregate is the 3/8-inch sieve. The fineness modulus (FM) is an index of the fineness of an aggregate.

The gradation, fineness modulus and mortar strengths were determined for all sands. Angularity was evaluated using a new National Aggregate Association (NAA) flow test. The NAA uncompacted void values are significantly affected by the percent of crushed particles and are a good measure of fine aggregate angularity.

Significance and Use A method of selecting mixture proportions Fineness = 9(100) - 156 = 900 - 156 for concrete based on the fineness modulus of the Modulus 100 100 combined fine and coarse aggregate was proposed Fineness by Abrams in 1918.

If it does vary by more than 0.2, changes in the mix proportions are needed to provide the same workability. Have your ready mix supplier check the fineness modulus of the fine aggregate currently used in the concrete mix, and then compare it to the fineness modulus for the mix design.

281.0 = 2.81 = Fineness Modulus 100 Coarse Aggregate Gradation Coarse aggregate shall be limestone, dolomite, gravel or air cooled blast furnace slag and meet the gradation requirements of a No. 8 coarse aggregate or a QA coarse aggregate with a designated gradation from the Certified Aggregate Producer. Also, the coarse aggregate is required to

I always give the example of coffee making for mix design. If you make one cup of coffee, assume 85% is milk then remaining 15% is coffee water and sugar If coffee water is thick, and the milk is thick you get good coffee. You can compare coffee w...

For aggregates used in PCC, another common gradation description for fine aggregate is the fineness modulus. It is described in ASTM C 125 and is a single number used to describe a gradation curve. It is defined as: The larger the fineness modulus, the more coarse the aggregate.

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 ...

Fineness modulus defines the size of the of the aggregates on concrete mix design. There area some limits on it though. If you have high modulus of fineness, the tendency of mixture is to have ...

2 METHOD OF CALCULATION OF THE FINENESS MODULUS OF AGGREGATE Fineness Coarse aggregate Fineness = 9(100) - 156 = 900 - 156 Modulus 100 100 = 7.44 Combined Coarse and Fine 65:35 Modulus Fineness = 9(100) - 302 = 900 - 302 Modulus 100 100 = 5.98 5. Significance and Use A method of selecting mixture proportions for concrete based on the fineness ...

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