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GRADATION OF AGGREGATE FOR CONCRETE BLOCK

* Fineness Modulus—An empirical factor obtained by adding the total percentages of a sample of the aggregate retained on each of a specified series of sieves, and dividing the sum by 100. Sieve sizes applicable are: 3/8, 4, 8, 16, 30, 50, and 100.

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Can Changes in Fine Aggregate Affect Concrete ...

Typically the fineness modulus varies between 3.2 and 2.8. A small number indicates a fine grading, and a large number indicates a coarser material. The fineness modulus of the fine aggregate is required for mix proportioning, since sand gradation has the largest effect on concrete workability.

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10 Testing

FINENESS MODULUS The fineness modulus is related to gradation. This term is commonly associated with aggregates for portland cement concrete. The purpose of this value is to determine the relative coarseness or fineness of the aggregate grading. The fineness modulus is computed in accordance with AASHTO T 27 by Sieve

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How to calculate the fineness modulus - Quora

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. It is found out by sieve analysis test of standard size in the l...

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Effect of Fineness of Sand on the Cost and Properties of ...

Fineness Modulus has larger impact on 28 days Compressive & Flexural Strength. Fineness Modulus has very little impact on Permeability of Concrete. Permeability coefficientis changed by about 2% for FM from 2.0 to 3.0. Fineness Modulus also affects the density of concrete. It increases by about 2.3% as the FM increases from 2.0 to 3.0.

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Concrete Technology Flashcards | Quizlet

- The fineness modulus is figured from the cumulative percent retained for sieves (up to No. 100 & Coarser) - divide by 100 - used in concrete mix proportioning and to determine the uniformity of the rock produced by the quarry In concrete the following occurs: - higher the fineness modulus the more economical the mix

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Strength of Cement - buildingresearch.np

Fineness Modulus is defined as the sum of the cumulative percentages retained on the sieves of the standard series, divided by 100. The standard series consists of sieves, each twice the size of the preceding one (ASTM No. 100, 50, 30, 16, 8, 4) and up to the largest sieve size present. Typical values of fineness modulus range from 2.2 to 3.2 ...

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SIEVE ANALYSIS OF FINE AND COARSE AGGREGATES FOP .

For sieves with openings 4.75 mm (No. 4) and larger, the mass, in grams shall not exceed the product of 2.5 × (sieve opening in mm) × (effective sieving area). See Table 1. Additional sieves may be necessary to keep from overloading sieves or to provide other information, such as fineness modulus. The sample may also be sieved in increments to

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Fineness modulus - Wikipedia

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.The sieve sizes are 0.15 mm, 0.3 mm, 0.6 mm, 1.18 mm, 2.36 mm, 4.75 mm, 9.5 mm, 19.0 mm, 38.1 mm and larger increasing in the ratio of 2:1.

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Fineness Modulus (FM) | What is it and is there something ...

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Jan 01, 2019 · The Fineness Modulus (FM) is a single number that is used to determine the aggregate distribution. The lower the Fineness Modulus the smaller the average particle size and the larger the fineness ...

3.7 - The fineness and particle size distribution of ...

The average particle size, defined as the size for which 50 wt% of the cement consists of larger particles, is sometimes used to characterize the overall fineness of the cement (in Figure 3-8 the average particle size is ). However, this is only one aspect of the particle size distribution, the other being its breadth.

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What Is the Fineness Modulus of Fine Aggregate ...

Fineness modulus estimates the proportions of aggregate in construction materials. Aggregate is inert granular material such as sand, gravel or crushed stone used to form concrete. The fineness modulus number affects the workability and finish of concrete. Before calculating fineness modulus, lab technicians pour aggregate onto sieves. Fineness ...

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Determination of fineness modulus of fine aggregate - Blogger

Jan 13, 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.

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Can Changes in Fine Aggregate Affect Concrete ...

Typically the fineness modulus varies between 3.2 and 2.8. A small number indicates a fine grading, and a large number indicates a coarser material. The fineness modulus of the fine aggregate is required for mix proportioning, since sand gradation has the largest effect on concrete workability.

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formula % of fine aggregate in fineness modulus term

Fineness Modulus is a term used as an index to the fineness or coarseness of ... Further, fine aggregate failing to meet the fineness modulus requirement as .... from 28 days testing of beam of size 150x150x700 mm by using following formula. Get Price

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Fineness Modulus - an overview | ScienceDirect Topics

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 3.7–1.6. Both medium sand and coarse sand spiked with some fine sand (coarse:fine = 4:1) are applicable.

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Sieve Analysis of Fine and Coarse Aggregates

*Nominal maximum size: One sieve larger than the first sieve to retain more than 10 percent of the material using an agency specified set of sieves based on cumulative percent retained. Where large gaps between specification sieves exist, intermediate sieve(s) .

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Aggregates in Concrete - UW Courses Web Server

The fineness modulus can be considered as a weighted average size of a sieve on which the material is retained, keeping in mind that the sieves are counted from the finest. For instance, a fineness modulus of 4.00 can be interpreted to mean the the fourth sieve, No. 16 in the US series, is the average size.

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Fineness Modulus of Coarse Aggregates and its Calculation

Limits of Fineness Modulus. Fineness modulus of coarse aggregate varies from 5.5 to 8.0. And for all in aggregates or combined aggregates fineness modulus varies from 3.5 to 6.5. Range of fineness modulus for aggregate of different maximum sized aggregates is given below.

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CRD-C104-80 Method of Calculation of the Fineness .

METHOD OF CALCULATION OF THE FINENESS MODULUS OF AGGREGATE 1. Definition 1.1 The standard definition of fineness ... and larger, increasing in the ratio of 2 to 1. 2. Procedure ... 4.1 A typical example of the calculation of the fineness modulus is shown below: Modulus Sieve Sizes, U. S. Series Total Percent Retained

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CM - Aggregate Properties Flashcards | Quizlet

missing small aggregates which fill in holes between larger ones (lower part of curve is skewed towards larger sizes) fineness modulus. measure of gradation fineness. fineness modulus (formula) FM = Sum(Ri)/100 *Ri = cumulative percent retained on sieve sequence #100, 50, 16, 8, 4, & 38" sieves. fineness modulus range for fine agg. 2.3-3.1.

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