Flakiness Index and Elongation Index of Coarse Aggregates
The Flakiness Index is the total weight of the material passing the various thickness gauges or sieves, expressed as a percentage of the total weight of the sample gauged. ... Concrete is a composite material composed of cement, coarse aggregate, fine aggregate, and water. Admixtures can be used to enhance concrete properties. A …
Flakiness Index and Elongation Index Test on Coarse Aggregate…
IS: 383–1970, Specification for coarse and fine aggregate from natural source for formation of concrete. Procedure For the Test Flakiness Index of Coarse Aggregate:-. Sieve the aggregate sample with sieves specified in Table 1. Take sufficient quantity of aggregate to provide the minimum number of 200 pieces of any fraction to be tested.
The Results of Flakiness Index Test for Coarse
Aggregates are considered the main components of asphalt mixtures in terms of weight, volume, and flexibility of pavements. Countries are looking for alternative materials for use in pavements as ...
SOUTH AFRICAN NATIONAL STANDARD
The flakiness index of coarse aggregate is a measurement of the flatness of an aggregate, which has an effect on many uses in the construction industry. For example, it affects the bulk density of the aggregate used for concrete and the performance of road surfacing aggregates.
Aggregate Angularity | Flakiness / Elongation Index
For more information read our blog Characteristics of Aggregates: Shape, Size, and Specific Gravity.. Void Content measures the angularity, sphericity, and surface texture of fine and coarse aggregates.; Proportional Calipers are efficient devices that quickly determine percentages of elongated and flat particles in coarse aggregate fractions.; …
7.3. Shape Tests for Aggregates 7.3.1 Flakiness index
The scope of this test is to provide test methods for determining the flakiness index of coarse aggregate. An aggregate is classified as being flaky if it has a thickness …
Automated measurement of aggregate properties: Part …
In order to increase the rapidity and accuracy of aggregate shape determination, a model based on a two-dimensional image analysis approach has been …
7.3. Shape Tests for Aggregates 7.3.1 Flakiness index
aggregates take under repeated loading and vibration. It is important that the flakiness and elongation of the aggregate are contained to within permissible levels. 7.3.1.2 Scope. The scope of this test is to provide test methods for determining the flakiness index of coarse aggregate. An aggregate is classified as being flaky if it has a thickness
Flakiness Index Test Of The Given Sample Of Course Aggregate
The Flakiness Index of aggregate is the percentage by weight of aggregate particles whose least dimension is less than 0.6 of their mean dimensions. This test is applicable to aggregates having a size larger than 6.3mm. To determine the flakiness index of the given sample of aggregates, the weight of each fraction of …
Flakiness Index Test of Aggregate, Shape Test on …
The flakiness index of aggregate is defined as the percentage by mass of particles (stones) in it whose least dimension (thickness) is less than three-fifths of their average dimension. Why is Flakiness Index Test on …
Flakiness index and Elongation Index of Coarse …
The Flakiness index of aggregates is the percentage by weight of particles whose least dimension (thickness) is less than three- fifths (0.6times) of their mean dimension. This test is not applicable to sizes smaller than …
TESTING AGGREGATES. PART 105: METHODS FOR DETERMINATION OF PARTICLES
Part 105 comprises two separately published sections: 105.1 Flakiness index of coarse aggregate (see IRRD 828491), and this Part. A method is described for determining the elongation index of coarse aggregate. The associated tests for angularity number given in the 1975 edition of BS 812 : part 1 is no longer included in this revision because ...
TESTING AGGREGATES. PART 105. METHODS FOR …
SECTION 105.1: FLAKINESS INDEX. This section of BS 812 describes the method for determining the flakiness index of coarse aggregate. Aggregate particles are classified as flaky when they have a thickness of less than 0.6 of their mean sieve size. The flakiness index of an aggregate sample is found by separating the flaky particles and ...
SANS5847
SANS5847 - Flakiness Index of Course Aggregates - Free download as PDF File (.pdf), Text File (.txt) or read online for free.
Shape Test on Aggregates
The aggregate flakiness index (FI) is the proportion by weight of aggregate particles with the smallest size / thickness that is less than three-fifths, or 0.6, of their mean dimension. This test applies to diameters greater than 6.3 mm. ... The coarse aggregate sample's combined index, CI, is thus equal to (FI + EI).
Determination Of Indices (Flakiness And Elongation)
IS: 2386 (Part 1)1963. DEFINITION. The Flakiness Index of aggregates is the percentage by weight of particles whose least dimension (thickness) is less than 0.6 times their mean dimension. The Elongation Index of aggregates is the percentage by weight of particles whose greatest dimension (length) is greater than 1.8 times their mean dimension.
Shape tests on Coarse Aggregates- Flakiness …
The flakiness index is the total weight of material passing through the gauge to the total weight of the sample. It is expressed in terms of percentage. Weigh the flaky material passing the gauge to an …
What Is Flakiness Index
The flakiness index is calculated as the percentage of the total weight of the material that passes through various thickness gauges, with W2 representing the weight of material passing through a gauge of 0.6 times the mean size of the sample, and W1 representing the total weight of the aggregates. It is recommended that the flakiness index of ...
Flakiness and Elongation Index Test for Aggregate
The apparatus shall be consisting of following:-Weight Balance (Digital balance):-Used for weighing the aggregate sample and It shall have an accuracy of 0.1 percent of the weight of the test sample.Elongation or Length gauge:-Used for passing different sizes of aggregate between different size ranges gaps on the gauge.Sieves sizes:- …
Manual for Flakiness Index & Elongation Index Gauges
A. General: Aggregate particles are flaky when they have a thickness (smallest dimension) less than 0.6 of their nominal size. The Flakiness Index is determined by separating the flaky particles and expressing their mass as a percentage of the total mass of …
Determination of Flakiness and Elongation Index of Coarse Aggregates
The flakiness index of aggregates is the percentages by weight of particles whose least dimension (thickness) is less than 3/5 th (0.6) of their mean dimension. The test does not apply to sizes smaller than 6.3 mm. [For example, the mean sieve size for an aggregate piece passing through 50 mm and retained on 40 mm sieve is (50+40)/2 i.e. 45 mm.
Determining Flakiness Index
FLAKINESS INDEX. TxDOT Designation: Tex-224-F. Effective Date: April 2022. 1. SCOPE. 1.1. Use this test method to determine the percentage of coarse aggregate …
TMH1
METHOD B3T TENTATIVE METHOD FOR THE DETERMINATION OF THE FLAKINESS INDEX OF A COARSE AGGREGATE SCOPE. The Flakiness Index of a coarse aggregate is determined by gauging screened-out fractions with the appropriate slot(s) given in Table I below. Aggregate retained on the 75 mm and passing the 4,75 mm …
ISO 19595:2017(en), Natural aggregates for concrete
1 Scope. This document specifies the properties and requirements of aggregates obtained by processing natural materials and mixtures of these aggregates for use in concrete. It is applicable to aggregates with an oven-dried particle density greater than 2,00 Mg/m 3 (2 000 kg/m 3) in accordance with ISO 22965 (all parts).
Flakiness Index | Austroads
The flakiness index is defined as the percentage (by mass) of stones in an aggregate having an ALD of less than 0.6 times their average dimension. Flaky aggregates tend to produce seals with less voids due to their tendency to pack more tightly than cubical aggregates, consequently flaky particles require less binder. Flakiness index may be ...
Shape test on Coarse Aggregates – Flakiness …
Shape test on Coarse Aggregates- Elongation index test. The presence of elongated particles in the aggregate is undesirable for construction. Also, this shape test is made in coarse aggregate. The …
Elongation Index Test For Aggregates
AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. CODE OF REFERENCE: • IS 2386(Part 1):1963 Methods of Test for Aggregates of Concrete- Particle Size and Shape. Reaffirmed Dec 2016 • ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat Elongated Particles …
LASER-BASED APPROACH FOR DETERMINING …
the masses of aggregate particles passing the slots. The flakiness index (in percent) is computed from the ratio of the mass of aggregate passing the gauge slots to total mass of aggregate retained on a specific sieve size (grading analysis). Mathematically, the flakiness index (FI) can be represented as follows: ×100
Automated measurement of aggregate properties: Part 2—flakiness index …
Descantes Y, Fosse Y, Ehret G (2006) Automated measurement of aggregate properties: Part 1–-crushed and broken surfaces in coarse aggregate particles. Materials and Structures 39:1-9. CEN standard (1996) EN 932-1. Tests for general properties of aggregates–-Part 1: Methods for sampling. (AFNOR, Saint Denis La Plaine).
7 Aggregate Test: Method & Procedure
The flakiness index of aggregate is the % by weight of the particles (aggregates) whose thickness is less than 3/5 th (0.6 times) of their mean dimension." Elongation Index The Elongation index of aggregate is the …
