Therefore, fineness modulus of coarse aggregates sum cumulative % retained 100 717100 7. It means the average aggregate size is in between 0. Pdf the influence of fineness modulus of pine aggregate. Coarse aggregates after the material has been sieved, remove each tray, weigh each size, and record each weight to the nearest 0. Chapter 2 sieve analysis and fineness modulus sampling. Effect of fineness of sand on the cost and properties of concrete. Range of particle sizes found in aggregate for use in concrete. Procedure of calcultion of fineness modulus of coarse aggregate products. 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.
Range of fineness modulus for aggregate of different maximum sized aggregates is given below. 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. It is described in astm c 125 and is a single number used to describe a gradation curve. Excelsheetforsieveanalysisofaggregateandtocalculate. Procedure of calcultion of fineness modulus of coarse aggregate. Fine aggregate means the aggregate which passes through 4. 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. Some of the descriptive terms used in referring to aggregate gradations are. The results of testing will re ect the condition and characteristics of the aggregate from which the sample is obtained. The coarse aggregate specific gravity test is used to calculate the specific gravity of coarse aggregate sample by determining the ratio of. There are several reasons for specifying grading limits and nominal maximum aggregate size. 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. Fineness modulus of combined aggregates is always between the fineness. Step by step guide for blending aggregates using fineness modulus value step1 calculate fineness modulus of fine aggregate.
How does the fineness modulus of aggregate affect the. This video contains about the fineness modulus in aggregate. 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. What is fineness modulus of sand fine aggregate and calculation. Excel sheet for sieve analysis of aggregate and to calculate fineness modulus 8. Theory fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. The function of the coarse aggregate is to act as the main loadbearing component of the concrete. For fine aggregate, no weight shall be in excess of 4 gmin. Aashto t 27, sieve analysis of fine and coarse aggregates. What is fineness modulus of coarse aggregates and its. 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.
Crdc10480 method of calculation of the fineness modulus of. Excel sheet for sieve analysis of aggregate and to. Significance and use a method of selecting mixture proportions. The sieve analysis, commonly known as the gradation test, is a basic essential test for all. Fineness modulus of sand fine aggregate is an index number which represents mean size of particles in sand. The fine aggregate sand taken is yamuna river sand and coarse aggregate taken is dolomite limestone in crushed form. Before calculating fm, lab technicians perform a sieve analysis to determine the particle size distribution, or grading, of the aggregate sample.
Fine aggregate content is usually 35% to 45% by mass or volume of the total aggregate content. Oct 03, 2018 fineness modulus is an indication grading of particle size. 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 value for tine aggregates commonly ranges from 2. Higher the aggregate size higher the fineness modulus hence fineness modulus of coarse aggregate is higher than fine aggregate. 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. Fineness modulus is defined as the sum of the cumulative percentages retained on specified sieves. It is found out by sieve analysis test of standard size in the laboratory.
Bulk density fineness grading absorption impurity specific gravity. Significance and use a method of selecting mixture proportions for concrete based on the fineness. Therefore, lightweight aggregates require a larger percentage of material. Sample preparation table 1 test sample sizes for aggregate gradation test shall conform to the following table and. Sand aggregate plays a significant role as a skeleton and in passing the stress in concrete. Higher the value of fm,coarser will be the aggregate.
Fineness modulus of finer aggregate is lower than fineness modulus of coarse aggregate. It has been sorted in several categories starting the. Effect of fineness of sand on the cost and properties of. Excel sheet for sieve analysis of aggregate and to calculate. The results indicate that the slump and flowability for all fresh concrete in this study right after mixing are between 265. 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. Currently, only the use of coarse aggregate derived from construction or demolition waste is recommended for use in new concrete construction. Determination of specific gravity of coarse aggregate as per is. 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 higher the fm is, the coarser the aggregate is. What is fineness modulus of sand fine aggregate and.
It means the average value of aggregate is in between the 2 nd sieve and 3 rd sieve. The appropriate range of fineness modulus of the sand aggregate used in normal concrete is 3. Fineness modulus value can be used as a technical way to blend coarse aggregate with fine aggregate to produce desired grading. This method determines the fineness modulus of concrete fine aggregate used in evaluation of natural and manufactured sands for portland cement concrete. Fineness modulus of fine aggregate txdot designation. Below is an example of the mechanical sieve analysis results of a fine and coarse aggregate with the fineness modulus computed. Fineness modulus fm is used in determining the degree of uniformity of the. The information obtained from fineness modulus is helpful in the following ways.
Making a sieve analysis test of coarse aggregate in a laboratory. Be sure to remove any aggregate trapped within the sieve openings by gently working from either or both sides with a trowel or. The thumb rule is lower the fineness modulus, particles are smaller and higher the fineness modulus, particles are larger. Fine aggregate from a source with a fineness modulus variation greater than 0. To find fineness modulus of coarse aggregate we need sieve sizes of 75mm, 37.
To find the fineness modulus of fine aggregate we need sieve sizes of 4. The importance of fineness modulus concrete construction. In the case of coarse fine aggregate mixtures, distribute the minus 4. And for all in aggregates or combined aggregates fineness modulus varies from 3. Abstract the effects of various fineness moduli fm of fine aggregate on the engineering properties of high. Fineness modulus of fine aggregate sand and sieve analysis. 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. 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. The concrete mixtures incorporate either basalt or crushed limestone, aggregate sizes of 12 mm h in. Then aspects of the fineness modulus and the specific surface not generally known are discussed.
Minnesota department of transportation concrete aggregate. The fineness modulus of samples taken from proposed sources must be a minimum 2. Fineness modulus is the number at which the average size of particle is known when. Fineness modulus is generally used to get an idea of how coarse or fine the aggregate is. Effect of specific gravity on aggregate varies the weight of. It is calculated by performing sieve analysis with standard. Fineness modulus is defined as the sum of the cumulative percentages. Feb 01, 2014 the function of the coarse aggregate is to act as the main loadbearing component of the concrete. Crdc10480 method of calculation of the fineness modulus. 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. The average fineness modulus typical of the source for a specific fine aggregate.
The fine aggregate serve the purpose of filling all the open space in between the coarse particles. Jan 21, 2018 this video contains about the fineness modulus in aggregate. 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. 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. A typical fineness modulus for fine aggregate used in pcc is between 2. Pdf the influence of fineness modulus of pine aggregate and. Fineness modulus of aggregate the fineness modulus f. 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. It is an empirical number relating to the fineness of the aggregate. Procedure of calcultion of fineness modulus of coarse. The larger the fineness modulus, the more coarse the aggregate. Fineness modulus is generally used to get an idea of how coarse or fine the.
Aggregate proportioning can be optimized using separate determinations of fine and coarse aggregates and blending techniques to control the fm for a concrete. Experimental study of compressive strength of recycled. Method of calculation of the fineness modulus of aggregate pdf. Both medium sand and coarse sand spiked with some fine sand coarse. Fineness modulus of coarse aggregate varies from 5. Apr 10, 2018 fineness modulus of sand and sieve analysis of sandhow to decide zone of sand fine aggregate.
Excel sheet for sieve analysis of aggregate and to calculate fineness modulus. The fineness modulus fm is an empirical figure obtained by adding the total percentage of. Generally there are 2 types of coarse aggregate is used coarse aggregate i grit, which is. Fineness modulus is an indication grading of particle size. Coarse aggregate means the aggregate which is retained on 4. What is fineness modulus of coarse aggregates and its calculation. More the value of fm more coarser the aggregate is. 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. 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. Follow the steps shown below to blend aggregate using fineness modulus value. For aggregates used in pcc, another common gradation description for fine aggregate is the fineness modulus.