Presents a method of concrete proportioning in which trial mixes are used only for the final adjust ment of mix parts. Apr 26, 2012 as per as i know there is no value given in is code. Coarse aggregate properties penn state engineering. What is fineness modulus of coarse aggregates and its calculation. From several trial mixes of scc it has been shown that a suitable mix for adequate compressive strength can be formulated with marginal aggregate of fine coarse aggregate ratio of 1. Once the fineness modulus of the fine aggregate is known, it can be used to select proportions of coarse aggregate.
Although you may use cpwd specification or text book for the same. Mix composition of concrete 1m3 aggregate type c kgm3 w kgm3 fa kgm3 ca kgm3. Effect of fineness modulus of manufactured sand on. The bulk densities of coarse aggregates are determined in a loose and compacted state and the results are presented in table 3. Experiments made in this study include compressive splitting tensile and flexural strengths of the concrete made with the ceramic coarse aggregate. The tensile strength of the concrete is severely affected by increasing the size of the aggregate. Fineness modulus of sand fine aggregate is an index number which represents the mean size of the particles in sand. 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 fine aggregate serve the purpose of filling all the open space in between the coarse particles. Limits of fineness modulus for coarse aggregates fineness modulus of coarse aggregate varies from 5. The thumb rule is lower the fineness modulus, particles are smaller and higher the fineness modulus, particles are larger. As the percentage of laterite increases, there was a reduction in all these characteristics even with the particle size of coarse aggregate reduction due to loss from the aggregate paste interface zone. Excel sheet for sieve analysis of aggregate and to calculate fineness modulus. Yet within the categories of fine and coarse aggregate, a whole world of differences may exist in particle size.
The cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fine aggregate. Fineness modulus is a term used as an index to the fineness or coarseness of aggregate. Stephen lane associate principal research scientist in cooperation with the u. Flexural and compressive strength of concrete as affected by. Excel sheet for sieve analysis of aggregate and to.
The fine aggregate used was river sand rs with a fineness modulus of 2. Feb 01, 2014 the function of the coarse aggregate is to act as the main loadbearing component of the concrete. After drying take the sample weight to nearest gram. Jan 21, 2018 this video contains about the fineness modulus in aggregate.
After curing, each cube was weighed using electronic balance and density of concrete was calculated. A higher aggregate modulus will result in a concrete having a higher modulus. If not what corrective action as to be taken is decided upon. Concrete elastic modulus for various aggregate types. Properties of selfcompacting concrete with recycled coarse. Hope it will consume less time in case of repetitive calculations. The larger the fineness modulus is, the coarser the sand will be the appropriate range of fineness modulus of the sand aggregate used in normal concrete is 3716 both medium sand and coarse sand spiked with some fine sand coarse. The information obtained from fineness modulus is helpful in the following ways. Actual tests for com pressive strength or other properties are used as a reliable check of the mix. What is fineness modulus of sand fine aggregate and calculation. Excel sheet for sieve analysis of aggregate and to calculate fineness modulus 8. Effect of coarse aggregate on elastic modulus and compressive. At the same time, there is a reduction in deformation and an increase in youngs modulus and unit weight of the concrete.
When corresponding fine aggregate specific gravity and absorption are determined on minus no. To improve the workability, many mixes contain both angular and round particles. The ratio of the weight in air of a unit volume of aggregate at a stated temperature to the weight in air of an equal volume. 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. Fineness modulus of fine aggregates particle size distribution duration. Fineness modulus fm the results of aggregate sieve analysis is expressed by a number called fineness modulus. It is used for the purpose of estimating the quantity of coarse aggregate to be used in the concrete mix design. This method determines the fineness modulus of concrete fine aggregate used in evaluation of natural and manufactured sands for portland cement concrete. Comparisons demonstrated that the effect of coarse aggregate on the elasticity modulus was negligible when compared to the concretes resistance class. The appropriate range of fineness modulus of the sand aggregate used in normal concrete is 3.
Even when a contractor knows the coarse to fine ratio, problems may ensue as the result of size variations within these categories. 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. Fm is the sum of the total percentages retained on each specified sieve divided by 100. Take a sample of coarse aggregate in pan and placed it in dry oven at a temperature of 100 110 o c. Download excel sheet for sieve analysis of aggregate and. Standard test method for sieve analysis of fine and coarse aggregates from different sources. Increasing the granular composition of the aggregate increases the efficiency utilization of cement in concretes working in compression. The fineness modulus of a sample of aggregate is an index number which is roughly proportional to the average size of particle in the aggregate, that is, coarser the. The importance of fineness modulus concrete construction.
The role of fineness modulus southport concrete co. The sampling and test methods shall be done with grading and fineness modulus test, organic impurities test, effect of organic impurities on strength test, soundness test, clay lumps and friable particles test, coal and lignite test, bulk density of slag test, abrasion of coarse aggregate test, reactive aggregate test, freezing and thawing test. Jan, 2018 determination of fineness modulus of fine aggregate particle size distribution of fine aggregates is the operation of dividing a sample of aggregate into various fractions each consisting of particles of the same size. Experiments were conducted to determine the effects of the properties of different coarse aggregates on the flexural and compressive strength of concrete. Procedure of calcultion of fineness modulus of coarse aggregate products. It is an empirical number relating to the fineness of the aggregate. Therefore, fineness modulus of aggregate cumulative % retained 100 275100 2. Determination of fineness modulus of fine and coarse aggregates by sieve analysis jsp civil engineering.
Significance and use a method of selecting mixture proportions for concrete based on the fineness. The results of testing will re ect the condition and characteristics of the aggregate from which the sample is obtained. How does the fineness modulus of aggregate affect the. Theory fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. Crdc10480 method of calculation of the fineness modulus. Fineness modulus is defined as the sum of the cumulative percentages retained on specified sieves. Conclusions for the wide range of coarse aggregate stiffness used, combined with a single, high strength, low watercement ratio mortar, the following conclusions may be drawn. Pdf standard test method for sieve analysis of fine and.
It is found out by sieve analysis test of standard size in the laboratory. The sieve analysis, commonly known as the gradation test, is a basic essential test for all. The fine aggregate used in the study was river sand, with a fineness modulus of 2. Currently, only the use of coarse aggregate derived from construction or demolition waste is recommended for use in new concrete construction. Determination of fineness modulus of coarse aggregates. While we talk about the strength of coarse aggregates it refers to the crushing strength of the aggregate itself. 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. Effect of fineness of sand on density of concrete after measuring the slump, several 150 mm cubes were filled. 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. 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.
Development of a catalog of resilient modulus values for. The properties of the coarse aggregate used in a concrete mixture affects the modulus for a few reasons. The higher the fm is, the coarser the aggregate is. M international journal of civil and structural engineering volume 2 issue 3 2012 793 sg ca specific gravity of coarse aggregate table 1. What is the physical meaning of a fineness modulus number. Range of fineness modulus for aggregate of different maximum sized aggregates is given below. 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. Aggregates for concrete e sieve and predominantly retained on the 75 m no. Fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. Coarse aggregate may be available in several different size groups, such as 19 to 4. Pdf influence of coarse aggregate on concretes elasticity.
Crdc10480 method of calculation of the fineness modulus of. Depending on the aggregate, differences of 40 percent in flexural strength and 29 percent in compressive strength were obtained for concrete of the same mix proportions. Determination of fineness modulus of fine aggregate. The fineness modulus fm is an empirical figure obtained by adding the total percentage of. How does the fineness modulus of aggregates affect the. The concrete mixtures incorporate either basalt or crushed limestone, aggregate sizes of 12 mm h in. The coarse aggregates used were nca broken granite gravel and rca laboratory waste concrete block and with continuous grading.
The increase in weight due to water contained in the pores of the material. The effect of aggregate size on strength and deformation of. Fineness modulus is generally used to get an idea of how coarse or fine the aggregate is. Fineness modulus is used only as a measure of effective fineness of combined aggregate to facilitate testing and control. One property is the modulus of elasticity of the coarse aggregate. As expected, a lightweight aggregate will have a lower modulus than the mortar paste.
This device provides a clamping mechanism which holds the sieve in place during agitation. It is calculated by performing sieve analysis with standard sieves. Download excel sheet to make sieve analysis calculation as well as fine modulus calculation to assess the particle size distribution of the coarse and fine aggregates. Shakers of this make need to be run 5 minutes for size 9 or larger and 10 minutes for sizes smaller than size 9. 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. Combinations of fine and coarse aggregates have intermediate values. Obtained by adding the sum of the cumulative percentages by mass of a sample aggregate retained on each of a specified series of sieves and dividing the sum by 100. It is described in astm c 125 and is a single number used to describe a gradation curve. The object of this experiment is to determine the fineness modulus and hence to plot the particle size distribution curve for the sample of fine aggregate supplied. 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 fineness of the sand plays an important role in the finishability of the concrete mix, and even small changes in fineness can affect finishing.
Determination of fineness modulus of a sample of fine. Fineness modulus defines the size of the of the aggregates on concrete mix design. Most commonly used coarseaggregates are crushed stone,gravel. Department of transportation federal highway administration. Specific gravity of coarse aggregate aashto t 85 glossary absorption.
This is the summation of cumulative percentage of materials retained on the standard sieves divided by 100. Paper open access related content effect of different coarse. The fineness modulus for any sample shall not vary by more than 0. 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. To find fineness modulus we need to perform sieve analysis and for that above mentioned sieve sizes, mechanical shaker and digital weigh scale are required. Fineness modulus of fine aggregate txdot designation. Determination of fineness modulus of fine and coarse. However, the required information on strength of coarse aggregates can be obtained from indirect tests. If you have high modulus of fineness, the tendency of mixture is to have. Effect of fineness of sand on the cost and properties of concrete.
Effect of fineness of sand on the cost and properties of. The latter attained about 95% of its 28day value by 7 days and gained little at later ages. The crushed stone or crushed gravel aggregate make the asphalt or concrete mix somewhat difficult to place. Apr 28, 20 aggregates whose particles donot pass through 4. Bulk specific gravity also known as bulk dry specific gravity. The aggregate modulus can be calculated from youngs modulus e and the poisson ratio v. And for all in aggregates or combined aggregates fineness modulus varies from 3. In relation to biomechanics, the aggregate modulus ha is a measurement of the stiffness of a material at equilibrium when fluid has ceased flowing through it.
Table 1 presents the water absorption 24 hours and density of the natural and recycled coarse aggregates. Excelsheetforsieveanalysisofaggregateandtocalculate. What is fineness modulus of coarse aggregates and its. The variation of density with fm of sand is shown in figure 3 for different cases. Mechanical and damping properties of recycled aggregate. It means the average value of aggregate is in between the 2 nd sieve and 3 rd sieve.
The cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fineness modulus. It is wellknown that aggregate plays an important role in achieving the desired properties of concrete. Coarse aggregate article about coarse aggregate by the free. Excel sheet for sieve analysis of aggregate and study resources. The characteristic of recycled aggregates could be different by its parent concrete because the.
Effect of specific gravity on aggregate varies the weight of. Higher the aggregate size higher the fineness modulus hence fineness modulus of coarse aggregate is higher than fine aggregate. Combined effect of fineness modulus and grading zones of fine. This paper reports the results of an experimental study on some of the mechanical properties of recycled aggregate concrete rac as compared to those of the conventional normal aggregate concrete nac. Mixing proportioning once the cement content, pozzolan content, watercementitious ratio, and fine to total aggregate percentage are defined for the concretes intended. The coarse aggregate specific gravity test is used to calculate the specific gravity of coarse aggregate sample by determining the ratio of. The coarse aggregate particles are usually crushed stone or crushed gravel, and the fine aggregate particles are usually natural sand. For any type of mix proportioning sieve analysis results and fineness modulus is required. To find fineness modulus of coarse aggregate we need sieve sizes of 80mm. 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. Fineness modulus of sand fine aggregate is an index number which represents mean size of particles in sand. As expected, coarse aggregate modulus was reflected in concrete modulus. Oct 03, 2018 fineness modulus is an indication grading of particle size.
The coarse natural aggregate consisted of crushed granite with a nominal size of 10 mm. Fineness modulus of fine aggregate is an index number which represents the mean size of the particles in the aggregate. Effect of aggregate type on compressive strength of concrete abdullahi. Ten mixes of concrete with target compressive cube strength ranging from 20 to 50 mpa were cast using normal or recycled coarse aggregates. Coarse aggregate means the aggregate which is retained on 4. Mechanical properties of concrete with recycled 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. More the value of fm more coarser the aggregate is. Method of calculation of the fineness modulus of aggregate pdf.
Calculating fineness modulus allows a contractor to predict concrete behavior much more accurately. What is the is code for the test of fineness modulus of fine. How to check zone of sand at site fineness modulus of sand limit learning technology official website. It is calculated by performing sieve analysis with standard. 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. Sieve analysis was conducted to determine the fineness modulus of coarse aggregates and details are presented in table 3. More fineness modulus value indicates that the aggregate is coarser and small value of fineness modulus indicates that the aggregate is finer. 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.
Astm c 33 requires the fm of fine aggregate to be between 2. Fine aggregate shall meet the requirements of table 2. The value for tine aggregates commonly ranges from 2. Senthamarai and devadas 2005 focused on the usage of industrial ceramic waste as replacement of natural coarse aggregate. Effect of aggregate type on compressive strength of concrete. Specification for coarse and fine aggregates from natural sources.
Fineness modulus of combined aggregates is always between the fineness modulus of aggregates and combined modulus coarse aggregate have intermediate value. How to check zone of sand at site fineness modulus of. Range of fineness modulus of manufactured sand range of fineness modulus of manufactured sand. 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. Both medium sand and coarse sand spiked with some fine sand coarse. Construction estimating software construction cost residential construction particle size distribution design build firms civil engineering science and nature vegetable garden.
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