Fineness Modulus of Sand • The fineness modulus is calculated from the particle size distribution of the fine aggregate • Values for sand suitable for concrete should range between 2.3 and 3.1 • Values can't differ by more than 0.2 • Coarse sand has a higher FM than fine sand • The FM influences the bulk volume of coarse aggregate

Get More3.1.2—Fineness modulus 3.1.3—Maximum size and nominal maximum size 3.1.4—Significance of aggregate grading 3.1.5—Permissible variations in grading 3.2—Specific gravity (relative density) 3.2.1—Definition 3.2.2—Determination of specific gravity 3.2.3—Significance of specific gravity 3.2.4—Absolute volume calculations

Get MoreFineness modulus of sand is an index arrived based on the particle size analysis and then dividing the sum of the cumulative percentage of particles retained on the sieves by 100. it is important to note that higher the fineness modulus, higher is the coarser portion of the sand.

Get Morecloser to rounded river sand. Another issue associated with river sand is that of obtaining required grading with a fineness modulus (FM) of 2.4 to 3.1. Generally FM of 2.2 to 2.6, 2.6 to 2.9 and 2.9 to 3.2 indicates that the sand is fine, medium and coarse confirming to …

Get More· highest values of fineness modulus are used instead of those with lowest values of fineness modulus. 2.2.2 In Table 2, the fineness modulii of fine aggregate has been taken as 1.26 ( fine sand ) for leaner mixes and 2.87 ( coarse sand ) for richer mixes, for computing the constants.

Get MoreDec 30, 2018· The Fineness Modulus is used to describe sand gradations with a single number. This video gives a detailed explanation of how to calculate the Fineness Modu...

Get MoreThe following is a list of recommended minimum sizes of composite samples to be used as a guide when collecting samples. MATERIAL SAMPLE SIZE No. 2 coarse aggregate 220 lb No. 5 coarse aggregate 110 lb No. 8 coarse aggregate 55 lb No. 9 coarse aggregate 35 lb No. 11 & No. 12 coarse aggregate 25 lb No. 43 coarse aggregate 110 lb

Get MoreThe fineness modulus (FM) is a useful value for indicating the re l a - t i v e fineness of a sand. FM is de-fined as the sum of the cumulative p e r centages retained on each of a s e r ies of standard sieves divided by 100. Higher values of FM indicate coarser sands. Pumpability of a mix g e n e r ally improves with a decre a s e

Get MoreApr 06, 2017· Grain Size Analysis. For the assessment of the particle size distribution of the specified fine aggregate and for determination of the fineness modulus, the effective size and uniformly coefficient. Fine aggregate refers to the sand which is basically utilized in mortars. Coarse aggregate is the broken stone which is utilized in concrete.

Get More2.1 The values used in computing fineness modulus shall be obtained by tests conducted in accordance with CRD-C 103. 3. Range of Values 3.1 The same value of fineness modulus may be obtained from several different particle-size distributions. In general a small value indicated a fine material while a large value indicates a coarse material.

Get MoreThe value of fineness modulus is higher for coarser aggregates and lower for finer aggregates. For the aggregates generally used, the range of fineness modulus is as below: Fine Aggregate 2.0 to 3.5. Coarse Aggregate 5.5 to 8.0. All-in-aggregate 3.5 to 6.5. Further, the range of fineness modulus for various categories of sand is as below:

Get MoreFM values plotted in a control chart provide a simple check of consistency of aggregate production. Table 2 is a typical control chart from an aggregate production facility. ASTM C33 recommends that sand be rejected or the mixture design be adjusted, if the FM varies more than 0.2.

Get MoreSignificance 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. This method is not widely used = 7.44 today but the concept of being able to describe Modulus particle ...

Get MoreFineness 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 a coarser and small value of fineness modulus indicates that the aggregate is finer. Fineness modulus of …

Get MoreJun 24, 2015· But in case of fully saturated sand the water films are broken and the volume becomes equal to that of dry sand. 9. 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.

Get MoreThe values of compressive strengths of mortar specimens issued from natural sands mortars vary from 18 to 27 MPa and increase with the fineness modulus. SB3 sand (FM=3.1) and SG5 sand (FM=2.2 ...

Get More⇒ The aggregate impact value of the aggregate used in. building concrete is less than 45 road pavement concrete is less than 30 runway concrete is less than 30 all the above. ⇒ C.R.R.I. charts are used to obtain a relatioship between strength of concrete and. water cement ratio workability grading of aggregate fineness modulus

Get MoreFeb 14, 2020· So, the Lawrencepur sand lies in the category of medium coarse sand; The value of fineness modulus is between 2.5 and 3.1, hence it is good fine aggregate; The graphs of the gradation curve are intersecting because the material is not well graded.

Get MoreThe 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.

Get MoreSep 01, 2014· 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 versa.

Get MoreAs fineness modulus of sand changes from 2.0 to 2.5 there is an increase in compressive strength from 43.07 to 49.00 MPa. i.e. strength increases by 14%. On the other hand by increasing Fineness Modulus from 2.5 to 3, Compressive strength increases from 49.00 to …

Get MoreJan 20, 2020· The sum of this cumulative percentage divided by 100 is the fineness modulus of the fine aggregate. The percentage by weight of the total fine aggregate passing through each of the sieves is calculated. These are plotted against the particle sizes using a …

Get MoreJul 30 2016What Is Fineness Modulus of Sand 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 modulus.

Get MoreAccording to the fineness modulus (MX), the specifications of machine-made sand can be divided into 4 types: coarse, medium, fine and extra fine: 1. Coarse Sand: the fineness modulus is 3.7-3.1, and the content of particles larger than 0.5mm exceeds 50% of the total weight, and the average particle size is …

Get MoreFineness 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. When all particles in a sample are coarser then say 600µm, the ...

Get More2.1.1 JVuttrral Sand - Fine aggregate resulting from the natural disinteg- ration of rock and which has been deposited by streams or glacial agencies. 2.1.2 Crushed Stone Sand - Fine aggregate produced by crushing hard stone. 2.1.3 Crushed Grace1 Sand - line aggregate produced by crushing natural gravel. .

Get MoreFineness 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. Type of sand Fineness modulus range Fine sand 2.2 – 2.6 Medium sand 2.6 – 2.9 Coarse sand 2.9 – 3.2

Get MoreFineness 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 modulus. Get Price.

Get MoreFineness Modulus of Fine Aggregate. Fine aggregates is the sand used in mortars. The size of the fine aggregate is limited to maximum 4.75mm beyond which it is known as coarse aggregates. Fineness modulus is only a numerical index of fineness that gives some idea about the mean size of the articles in the entire body of concrete.

Get MoreA comparison of three maximum size gradings of sand-gravel and sand-crushed stone mixtures in concrete has revealed that for each type and size of coarse aggregate a constant value for fineness modulus will be obtained for any workable mixture from lean to rich, if the cement is included in the modulus figures.

Get MoreThe original sample must be reduced to a test sample size which falls within the minimum and maximum weight in the following table. WEIGHT OF TEST SAMPLE AGGREGATE SIZE MINIMUM MAXIMUM 68,000 g 90,700 g No.2 11,300 g --- No.5, No. 8, and No. 91 6000 g 8000 g No. 9 4000 g 6000 g No. 11 2000 g --- No. 12 1000 g --

Get MoreFINENESS MODULUS (FM) - The fineness modulus (FM) is a factor obtained by adding the percentages of material in a sample of aggregate that is retained on each of the following sieves: #100, #50, #30, #16, #8, #4, 3/8", ¾", 1 ½", 3", 6". The result is divided by 100 to arrive at the fineness modulus. For conventional concrete the ...

Get MoreTo find fineness modulus of coarse aggregate we need sieve sizes of 80mm, 40mm, 20mm, 10mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm and 0.15mm. …

Get Moreb) As per the grading given in Table 1, the fineness modulus of sand could vary from I.2 to 2.2. However, it is preferable to have minimum fineness modulus of l-4 in case of crushed stone sands and crushed gravel sands and a F. M of 1 5 in case of naturally occurring sands. Hence,

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