Significance and use a method of selecting mixture proportions for concrete based on the fineness. Fineness modulus is generally used to get an idea of how coarse or fine the. Fineness modulus of combined aggregates is always between the fineness. It is calculated by performing sieve analysis with standard. Pdf the influence of fineness modulus of pine aggregate and. Fineness modulus is defined as the sum of the cumulative percentages. Significance and use a method of selecting mixture proportions.
Procedure of calcultion of fineness modulus of coarse aggregate products. It means the average aggregate size is in between 0. Oct 03, 2018 fineness modulus is an indication grading of particle size. Effect of fineness of sand on the cost and properties of. Fineness modulus is the number at which the average size of particle is known when. It has been sorted in several categories starting the fineness modulus fm of sand from 2. It is based on th e summation of the percentages of material passing the fineness modulus sieves and is determined by dividing this result by 100, and subtracting from 10. To find fineness modulus of coarse aggregate we need sieve sizes of 80mm, 40mm, 20mm, 10mm, 4. Fineness modulus fm is used in determining the degree of uniformity of the.
For fine aggregate, no weight shall be in excess of 4 gmin. The influence of fineness modulus of pine aggregate and grain shape of coarse aggregate on the properties of high flowing concrete article pdf available january 2005 with 166 reads how we. Excel sheet for sieve analysis of aggregate and to. Fineness modulus value can be used as a technical way to blend coarse aggregate with fine aggregate to produce desired grading.
There are several reasons for specifying grading limits and nominal maximum aggregate size. And for all in aggregates or combined aggregates fineness modulus varies from 3. Step by step guide for blending aggregates using fineness modulus value step1 calculate fineness modulus of fine aggregate. Fineness modulus of fine aggregate sand and sieve analysis.
The concrete mixtures incorporate either basalt or crushed limestone, aggregate sizes of 12 mm h in. The function of the coarse aggregate is to act as the main loadbearing component of the concrete. Results shows that with partial replacement of stone dust with 0%, 30% and 40% and 10% recycled coarse aggregate, flexure strength increased by 26. The fineness modulus fm of either fine or coarse aggregate according to astm c 125 is calcu lated by adding the cumulative percentages by mass retained on. A sieve analysis or gradation test is a practice or procedure used commonly used in civil engineering to assess the particle size distribution also called gradation of a granular material. Aggregate proportioning can be optimized using separate determinations of fine and coarse aggregates and blending techniques to control the fm for a concrete.
Excel sheet for sieve analysis of aggregate and to calculate fineness modulus the sieve analysis, commonly known as the gradation test, is a basic essential test for all aggregate technicians. Fine aggregate from a source with a fineness modulus variation greater than 0. Abstract the effects of various fineness moduli fm of fine aggregate on the engineering properties of high. Therefore, lightweight aggregates require a larger percentage of material. What is fineness modulus of coarse aggregates and its calculation. What is fineness modulus of coarse aggregates and its. The effects of aggregate type, size, and content on the behavior of normal and highstrength concrete, and the relationships between compressive strength, flexural strength, and fracture energy are discussed. This method determines the fineness modulus of concrete fine aggregate used in evaluation of natural and manufactured sands for portland cement concrete. How does the fineness modulus of aggregate affect the. The fineness modulus of samples taken from proposed sources must be a minimum 2.
The appropriate range of fineness modulus of the sand aggregate used in normal concrete is 3. At each location, the intermediate coarse aggregate was obtained from the same quarry as the larger coarse aggregate to keep the particle shape consistent and thereby minimize the influences of different particle shapes on test results. Fineness modulus of fine aggregate txdot designation. Feb 01, 2014 the function of the coarse aggregate is to act as the main loadbearing component of the concrete. Method of calculation of the fineness modulus of aggregate pdf. The fine aggregate serve the purpose of filling all the open space in between the coarse particles. The fine aggregate sand taken is yamuna river sand and coarse aggregate taken is dolomite limestone in crushed form. Sample preparation table 1 test sample sizes for aggregate gradation test shall conform to the following table and. These include two mathematical expressionsfor thefineness modulus as afunction of the particle size distribution, which show that the fineness modulus is a measure of the logarithmic average particle size of the grading. 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. Fineness modulus of sand fine aggregate is an index number which represents mean size of particles in sand. It is an empirical number relating to the fineness of the aggregate.
The importance of fineness modulus concrete construction. The value for tine aggregates commonly ranges from 2. Some of the descriptive terms used in referring to aggregate gradations are. The thumb rule is lower the fineness modulus, particles are smaller and higher the fineness modulus, particles are larger.
Crdc10480 method of calculation of the fineness modulus. Range of particle sizes found in aggregate for use in concrete. It has been sorted in several categories starting the. In the case of coarse fine aggregate mixtures, distribute the minus 4. 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. The larger the fineness modulus, the more coarse the aggregate. The information obtained from fineness modulus is helpful in the following ways. Theory fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. Fineness modulus is defined as the sum of the cumulative percentages retained on specified sieves. Jan 21, 2018 this video contains about the fineness modulus in aggregate.
The results of testing will re ect the condition and characteristics of the aggregate from which the sample is obtained. The sieve analysis, commonly known as the gradation test, is a basic essential test for all. Sand aggregate plays a significant role as a skeleton and in passing the stress in concrete. If the fineness modulus is constant, the volume of coarse aggregate increase with size of the aggregate, or with the decrease in surface area of the coarse aggregate. The use of the fineness modulus for the grading evaluation. Currently, only the use of coarse aggregate derived from construction or demolition waste is recommended for use in new concrete construction. This video contains about the fineness modulus in aggregate. Excel sheet for sieve analysis of aggregate and to calculate. Minnesota department of transportation concrete aggregate. It is described in astm c 125 and is a single number used to describe a gradation curve. The results indicate that the slump and flowability for all fresh concrete in this study right after mixing are between 265. Fineness modulus of finer aggregate is lower than fineness modulus of coarse aggregate.
Before calculating fm, lab technicians perform a sieve analysis to determine the particle size distribution, or grading, of the aggregate sample. To find the fineness modulus of fine aggregate we need sieve sizes of 4. Bulk density fineness grading absorption impurity specific gravity. Procedure of calcultion of fineness modulus of coarse aggregate. Be sure to remove any aggregate trapped within the sieve openings by gently working from either or both sides with a trowel or. Excel sheet for sieve analysis of aggregate and to calculate fineness modulus.
Fineness modulus of aggregate is an index number which gives an idea about the finance of aggregate and is an approximate proportion of the average size of particle in the aggregate. The average fineness modulus typical of the source for a specific fine aggregate. Excel sheet for sieve analysis of aggregate and to calculate fineness modulus 8. Chapter 2 sieve analysis and fineness modulus sampling. Fineness modulus of coarse aggregate varies from 5. Two kinds of coarse aggregates stiff and soft and three kinds of fine aggregates fm3. Procedure of calcultion of fineness modulus of coarse. 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 aggregate the fineness modulus f. Effect of specific gravity on aggregate varies the weight of. Effect of specific gravity on aggregate varies the weight. Higher the value of fm,coarser will be the aggregate.
The coarse aggregate specific gravity test is used to calculate the specific gravity of coarse aggregate sample by determining the ratio of. What is fineness modulus of sand fine aggregate and calculation. Experimental study of compressive strength of recycled. Fine aggregate content is usually 35% to 45% by mass or volume of the total aggregate content. Higher the aggregate size higher the fineness modulus hence fineness modulus of coarse aggregate is higher than fine aggregate. In the present investigations, the effect of fineness modulus of sand has been investigated.
More the value of fm more coarser the aggregate is. Therefore, fineness modulus of coarse aggregates sum cumulative % retained 100 717100 7. It means the average value of aggregate is in between the 2 nd sieve and 3 rd sieve. Making a sieve analysis test of coarse aggregate in a laboratory. Aashto t 27, sieve analysis of fine and coarse aggregates.
Both medium sand and coarse sand spiked with some fine sand coarse. For aggregates used in pcc, another common gradation description for fine aggregate is the fineness modulus. Coarse aggregates after the material has been sieved, remove each tray, weigh each size, and record each weight to the nearest 0. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any sizereduction requirements including, procedure of calcultion of fineness modulus of coarse aggregate, quarry, aggregate, and different kinds of minerals. To find fineness modulus of coarse aggregate we need sieve sizes of 75mm, 37. Fineness modulus is an indication grading of particle size. Follow the steps shown below to blend aggregate using fineness modulus value. Apr 10, 2018 fineness modulus of sand and sieve analysis of sandhow to decide zone of sand fine aggregate.
Fineness modulus is generally used to get an idea of how coarse or fine the aggregate is. Rock fragments, usually rounded or semirounded, with an average dimension between 3 inches and 10 inches. The fineness modulus fm is an empirical figure obtained by adding the total percentage of. Crdc10480 method of calculation of the fineness modulus of. A typical fineness modulus for fine aggregate used in pcc is between 2. It is found out by sieve analysis test of standard size in the laboratory. Then aspects of the fineness modulus and the specific surface not generally known are discussed. Generally there are 2 types of coarse aggregate is used coarse aggregate i grit, which is. Fine aggregate means the aggregate which passes through 4.
Effect of fineness of sand on the cost and properties of concrete. Range of fineness modulus for aggregate of different maximum sized aggregates is given below. What is fineness modulus of sand fine aggregate and. Excelsheetforsieveanalysisofaggregateandtocalculate. Coarse aggregate means the aggregate which is retained on 4. Below is an example of the mechanical sieve analysis results of a fine and coarse aggregate with the fineness modulus computed. Aug 14, 2019 fineness modulus of aggregate is an index number which gives an idea about the finance of aggregate and is an approximate proportion of the average size of particle in the aggregate. Sep 01, 2014 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. 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. Pdf the influence of fineness modulus of pine aggregate.
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