Method of test for determining total moisture and free moisture in aggregate coarse and fine dotd designation. The application of fineness modulus and particle size distribution of aggregate is to fine the aggregate is coarse or fine wheather it can be used in making mortar or concrete. The importance of fineness modulus concrete construction. This specification covers fine aggregate for use in bituminous paving mixtures. Fineness modulus fm is used in determining the degree of uniformity of the. Cem 5l lab report 2 sieve analysis of fine aggregate and. Based on the practical experience, the fineness modulus of fine aggregate should be between 2 to 3. Jan 21, 2018 this video contains about the fineness modulus in aggregate. This method determines the fineness modulus of concrete fine aggregate used in evaluation of natural and manufactured sands for portland cement concrete. The cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fineness modulus.
To find the fineness modulus of fine aggregate we need sieve sizes of 4. What is fineness modulus of coarse aggregates and its calculation. Determination of fineness modulus of coarse aggregates. It is calculated by performing sieve analysis with standard. C6 test method for sieve analysis of fine and coarse aggregates. Finess modulus value of stone dust rangehenan mining. Therefore, lightweight aggregates require a larger percentage of material. It is calculated by performing sieve analysis with standard sieves. In general, however, a smaller value indicates a finer aggregate. The higher the fm is, the coarser the aggregate is. Jan, 2018 many a time, fine aggregates are designated as coarse sand, medium sand and fine sand.
Grading, fineness modulus and plasticity index shall be tested to meet the requirements prescribed. These classifications do not give any precise meaning. Method of test for determining total moisture and free. Determination of fineness modulus of sand to determine the fineness modulus, we need standard sieves, mechanical sieve shaker. So, in the calculation of coarse aggregate we need all sizes of sieves. If not what corrective action as to be taken is decided upon. Concrete mix design a modification of the fineness modulus. Fineness modulus is generally used to get an idea of how coarse or fine the. Standard test method for sieve analysis of fine and coarse aggregates from different sources.
Once the fineness modulus of the fine aggregate is known, it can be used to select proportions of coarse aggregate. This research is mainly concentrated on gradation of fine aggregate to get required quality by examine the effect of different fineness modulus fm of msand 2. Fineness modulus how is fineness modulus abbreviated. More fineness modulus value indicates that the aggregate is coarser and small value of fineness modulus indicates that the aggregate is finer. Object a to conduct a sieve analysis of a sample of fine aggregate fa or sand, as supplied, and of sample of coarse aggregate ca, also as supplied b to calculate the fineness modulus fm of the fa or sand c to determine if the astm specifications for fa are met d to understand the limitations of sieve analysis and of using fm as. Procedure of calcultion of fineness modulus of coarse aggregate products. 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.
Fineness modulus of sand fine aggregate is an index number which represents the mean size of the particles in sand. Aggregate is a collective term for the mineral materials such as sand, gravel and. And coarse aggregates aashto t 27 scope the sieve analysis, commonly known as the gradation test, is a basic essential test for all aggregate technicians. The significance of fineness modulus fm is in specifying the proportions of fine and coarse aggregates when designing concrete mixes. Effect of fineness of sand on the cost and properties of.
Fineness modulus is determined using percentages of the size fractions from the sieve. The appropriate range of fineness modulus of the sand aggregate used in normal concrete is 3. This procedure is designed to determine the total moisture and free moisture contents of coarse and fine aggregates for portland cement concrete by drying the. What is fineness modulus of sand fine aggregate and calculation. The function of the coarse aggregate is to act as the main loadbearing component of the concrete. However, it is preferable to have minimum fineness modulus of l4 in case of crushed stone sands and crushed gravel sands and a f. Coarse aggregate means the aggregate which is retained on 4. Pdf standard test method for sieve analysis of fine and. Effect of specific gravity on aggregate varies the weight of. I will tell you in todays post, determination of fineness of cement by sieving in a very easy way. So let us look into fineness modulus if you recall yesterday or last class we are. Fine aggregate locally available river bed sand with specific gravity 2. An example provided in the aci 211 standard states that, for a fine aggregate having a fineness modulus of 2. Therefore, fineness modulus of aggregate cumulative % retained 100 275100 2.
Method of calculation of the fineness modulus of aggregate pdf. Theory fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. For aggregates used in pcc, another common gradation description for fine aggregate is the fineness modulus. Aashto t 27, sieve analysis of fine and coarse aggregates. Then the particles distribution study given an idea as to weather the material well grade or not. A comparison of three maximum size gradings of sandgravel and sandcrushed 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. Although manual agitation of the sieves is permitted in the standard, gilson.
The results of testing will re ect the condition and characteristics of the aggregate from which the sample is obtained. Sieve analysis of fine and coarse aggregates aashto t 27 scope the sieve analysis, commonly known as the gradation test, is a basic essential test for all aggregate technicians. To calculate the fineness modulus of sand, the sum of the cumulative. Oct 03, 2018 fineness modulus is an indication grading of particle size. This abstract is a brief summary of the referenced standard. Determination of fineness modulus of fine and coarse. Both medium sand and coarse sand spiked with some fine sand coarse. Fineness modulus of fine aggregate txdot designation. Aggregate on strength of mortar mortar strength effective date. 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 sourcetype of fine aggregates. Fineness modulus is the number at which the average size of particle is known when we counted from lower order sieve size to. Bulking is increase in volume with moisture for sand it is only for.
Two kinds of coarse aggregates stiff and soft and three kinds of fine aggregates fm3. This is the summation of cumulative percentage of materials retained on the standard sieves divided by 100. Sieve analysis of fine aggregates fineness modulus of fine. How will the concrete industry benefit from these tests. The aggregate shall be sampled to meet the requirements prescribed. To avoid this ambiguity fineness modulus could be used as a yard stick to indicate the fineness of sand. Aggregates for concrete e sieve and predominantly retained on the 75 m no. 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. 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 bulk densities of coarse aggregates are determined in a loose and compacted state and the results are presented in table 3. Generally, a lower fm results in more paste, making the concrete easier to finish. To find fineness modulus we need to perform sieve analysis and for that. The information obtained from fineness modulus is helpful in the following ways. However, increase in fineness of cement increases the drying shrinkage and cracking of the concrete.
More the value of fm more coarser the aggregate is. The results indicate that the slump and flowability for all fresh concrete in this study right. Fineness of cement is tested either by sieving or by determination of specific surface using. The fine aggregate used is conforming to grading zone ii according to the table 4 of is. The same value of fineness modulus may therefore be obtained from several different particle size distributions. Fineness modulus is defined as the sum of the cumulative percentages retained on specified sieves. The sieve analysis determines the gradation the distribution of aggregate particles, by size, within a given sample in order to determine compliance with design. The cumulative percentage retained on each sieve is added and subdivided by 100 gives the value of coarse aggregate. Fineness also provides more cohesiveness to concrete and avoid separation of water at the top of concrete called bleeding.
Fineness modulus is defined as the sum of the cumulative percentages retained on specified sieves divided by 100. Combinations of fine and coarse aggregates have intermediate values. Determination of specific gravity of coarse aggregate. I will tell you in todays post, determination of fineness modulus of a sample of fine aggregate in a very easy way. Development of m 90 grade of concrete using micro silica. Astm d1073 16 standard specification for fine aggregate for. The fine aggregate serve the purpose of filling all the open space in between the coarse particles. 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. Sample preparation table 1 test sample sizes for aggregate gradation test shall conform to the following table and.
Physical properties of aggregates rowan university. According en 12620 is fm calculated on the following sieves. It is an empirical number relating to the fineness of the aggregate. It means the average aggregate size is in between 0. Before calculating fm, lab technicians perform a sieve analysis to determine the particle size distribution, or grading, of the aggregate sample. The fine aggregate can be medium sand but not fine sand. How does the fineness modulus of aggregate affect the. The fineness modulus cannot represent the particle size distribution, but it is useful for measuring slight variations in the aggregate from the same source, i. Standard specification for fine aggregate for asphalt. Abstract the effects of various fineness moduli fm of fine aggregate on the engineering properties of high.
The thumb rule is lower the fineness modulus, particles are smaller and higher the fineness modulus, particles. Sep 01 2014nbsp018332fineness 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. Fineness modulus is calculated from the sieve analysis. Fineness modulus of sand fine aggregates calculations, values. Fineness modulus fm is used in determining the degree of uniformity of the aggregate gradation in pcc mix designs. Determination of fineness modulus of fine and coarse aggregates by sieve analysis.
The fine aggregate is the local river sand rs with a specific gravity of 2. Apr 08, 20 this feature is not available right now. The sieve analysis determines the gradation the distribution of aggregate. It is wellknown that aggregate plays an important role in. What is fineness modulus of coarse aggregates and its. 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. Scope a sieve analysis, or gradation, measures distribution of aggregate particle sizes within a given sample.
Sand aggregate plays a significant role as a skeleton and in passing the stress in concrete. Fineness modulus is generally used to get an idea of how coarse or fine the aggregate is. Fineness modulus of combined aggregates is always between the fineness modulus of aggregates and combined modulus coarse aggregate have. Pdf effects of combined aggregate gradation on the. Effects of combined aggregate gradation on the compression strength and workability of concrete using fineness modulus article pdf available june 2019 with 186 reads how we. Determination of fineness modulus of sand to determine the fineness modulus, we need standard sieves, mechanical sieve shaker optional. It is found out by sieve analysis test of standard size in the laboratory. Procedure of calcultion of fineness modulus of coarse aggregate. An empirical factor obtained by adding the total percentage of sample of the aggregate retained on each of a. Fineness modulus is the number at which the average size of particle is known when we counted from lower order sieve size to higher order sieve. This video contains about the fineness modulus in aggregate.
Fineness modulus is a term used as an index to the fineness or coarseness of aggregate. The coarse aggregate did not fall within any astm c33 standard. D107316 standard specification for fine aggregate for asphalt paving mixtures pavements bituminous mixtures. To find fineness modulus of coarse aggregate we need sieve sizes of 75mm, 37. 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. The larger the fineness modulus, the more coarse the aggregate. Determination of fineness modulus of a sample of fine. Fineness modulus of combined aggregates is always between the fineness modulus of aggregates and combined modulus coarse aggregate have intermediate value. Chapter 2 sieve analysis and fineness modulus sampling. It is described in astm c 125 and is a single number used to describe a gradation curve.
Higher the aggregate size higher the fineness modulus hence fineness modulus of coarse aggregate is higher than fine aggregate. What the supplier terms as fine sand may be really medium or even coarse sand. Fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. The fineness modulus fm is an empirical figure obtained by adding the total percentage of. Fineness modulus of finer aggregate is lower than fineness modulus of coarse aggregate. 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. Determination of fineness modulus of fine aggregate blogger. Coarse aggregate may be available in several different size groups, such as 19 to 4. The fineness modulus is an index number which s calculat using the sieve data, it. The sample may be sieved in increments and the mass retained for. Sieve analysis was conducted to determine the fineness modulus of coarse aggregates and details are presented in table 3. Effect of fineness modulus of manufactured sand on.
October 2019 sieve analysis of fine and coarse aggregates fop for aashto t 27 materials finer than 75 m no. Determination of fineness of cement by sieving learning. January 1, 2018 hard copies uncontrolled page 5 of 82 1. Fineness 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. Fineness modulus is defined as an index to the particle size not to the gradation. Effects of various fineness moduli of fine aggregate on. 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. Crdc10480 method of calculation of the fineness modulus of. Significance and use a method of selecting mixture proportions for concrete based on the fineness. The higher the value of fm, the coarser the aggregate. Analysis of feed particle fineness 936 determination of modulus of uniformity a screen mesh b % of material on each screen c totals of column b d e figs. Higher the value of fm,coarser will be the aggregate. Crdc10480 method of calculation of the fineness modulus.