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Best DealThe required fineness of good cement is achieved through grinding the clinker in the last step of cement production process As hydration rate of cement is directly related to the cement particle size fineness of cement is very important Importance of Cement Fineness The fineness of cement affects hydration rate and in turn the strength
The fineness of a given sample of cement is Report the value of R to the nearest 01 percent as the residue on the 90 micron sieve for the cement tested The standard deviation of the repeatability is about 02 percent and of the reproducibility is about 03 percent
Fineness of Cement is Measure of the size of Cement Particle and it is described in terms of specific surface area of Cement particle The Fineness of cement can be Calculated by particle size analysis
The fineness of cement is controlled by a minimum specific surface area defined as the surface area of cement particles per gram of cement For ordinary Portland cement the specific surface area should not be less than 2250 centimeter square per gram
The information obtained from fineness modulus is helpful in the following ways Sieve Analysis 1 Fineness modulus tells us directly whether the material is wellgraded or gapgraded 2 Fineness modulus gives us an overall idea whether the material is fine or coarse Higher the value of FM coarser will be the aggregate
Job 7 Determination of Fineness Of Cement ASTM Designation C18494
2 IS 8112 2013 Table 2 Chemical Requirements for Ordinary Portland Cement 43 Grade Foreword and Clauses 51 and 52Sl No Characteristic Requirement 1 2 3 i Ratio of percentage of lime to percentages of silica 066102
Fineness Modulus also affects the density of concrete It increases by about 23 as the FM increases from 20 to 30 Optimum value of density and other parameters are obtained when FM is 28 The optimum value of strength can be taken when workability of concrete is also good It is obtained when Fineness Modulus is about 27
For conventional concrete the fineness modulus of the fine aggregate should range from 23 to 31 A higher fineness modulus represents a coarser material and a lower fineness modulus represents a finer material Knowing the fineness modulus of aggregate gives you some indication of the amount of paste needed to make concrete using the
Back to Main Page Strength of Cement Strength of cement is the most important of all the cement properties Grades mentioned in the cement bags as 5343 grade OPCPPC in fact represent the strength of the cement 53 Grade OPC Cement simply means that 28days compressive strength of the cementmortar cubes prepared out of that cement in a standard manner will be of 53 MPa
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 The results of testing will re ect the condition and characteristics of the
Fine aggregate fineness modulus 280 specific gravity 264 moisture content 5 percent absorption 07 percent Air content 45 65 percent Maximum allowable watercement ratio 044 Minimum cement content 335 kg 565 lb Density of water 1000 kgm 3 624 lbft 3 Specific gravity of portland cement 315 typically
14 Higginson EC e e ect of Cement Fineness on Concrete Fineness of Cement America n Society for T estin g and Materials ASTM ST P 473 1 9 707 181
Apr 26 2012 In that case i shall require the numbers of both the codes The fineness test uses sieves of different sizes The finer retained on different sieves is added and the sum is divided by 100
Step 01 Data to be collected Fineness modulus of selected FA Unit weight of dry rodded coarse aggregate Sp gravity of coarse and fine aggregates in SSD condition Absorption characteristics of both coarse and fine aggregates Specific gravity of cement Example
Cement Standards and Concrete Standards ASTMs cement and concrete standards are instrumental in the evaluation and testing of concrete cement and aggregates Concrete can have different properties depending upon the mixture that is used in creating it which contains cement chemical admixtures and aggregates
Fineness Modulus Nature of sand 1 22 26 Fine sand 2 26 29 Medium sand 3 29 32 Coarse sand Sand having a fineness modulus more than 32 will be unsuitable for making satisfactory concrete The fineness modulus values obtained for sand quarry dust and coarse aggregate are given in Tables 37 to 39
I will tell you in todays post Determination of Fineness Modulus of a Sample of Fine Aggregate in a very easy way Objective of Experiment 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
Jan 19 2019 FM is the sum of the total percentages retained on each specified sieve divided by 100 ASTM C 33 requires the FM of fine aggregate to be between 23 and 31 The higher the FM the coarser the aggregate Fine aggregate affects many concrete prope
Total weight of residue w 2 134 gram age of fineness 866 COMMENTS The fineness of cement is not according to the ASTM standard so the cement is not perfectly fresh therefore it should not be used for making concrete where high strength is required but can be used for low load structures as fineness is not too bad
Jan 29 2019 The fineness of cement is a measure of the size of particles of cement and is expressed in terms of specific surface area of cement Fineness can be calculated from
The fineness modulus of the sand used in ordinary concrete is within 37 16 And if M x is within 37 31 it is coarse sand if M x is within 30 23 it is medium sand if M x is within 22 16 it is fine sand and if M x is within 1507 it is superfine sand which should be considered specifically when concrete is prepared
sand taken in the study was having fineness modulus of 126 and grading within limits as given in IS 15421960 and IS 211619657 22 Concrete The material constants for cement concretes and lime
Jan 06 2018 Fineness of cement is a characteristic property of cement that signifies the particle size of cement and its specific surface area Greater fineness of cement means the particles are finer and had more surface area In case of very coarse cement under some conditions it can cause a serious bleeding problem on some construction projects
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 So in the calculation of coarse aggregate we need
b As per the grading given in Table 1 the fineness modulus of sand could vary from I2 to 22 However it is preferable to have minimum fineness modulus of l4 in case of crushed stone sands and crushed gravel sands and a F M of 1 5 in case of naturally occurring sands Hence
FINENESS MODULUS OF FINE AGGREGATE TxDOT Designation Tex402A Effective Date August 1999 1 SCOPE 11 This method determines the fineness modulus of concrete fine aggregate used in evaluation of natural and manufactured sands for portland cement concrete 12 The values given in parentheses if provided are not standard and may not be exact
FINENESS So we need to determine the fineness of cement by dry sieving as per IS 4031 Part 1 principle of this is that we determine the proportion of cement whose grain size is larger then specified mesh size
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