What is flakiness index of coarse aggregate?
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.
What is the importance of flakiness index?
The Significance of Flakiness Index and Elongation Index Test of Aggregate. The test Flakiness index of aggregate is used to determine the particle shape of the aggregate specimen and each particle shape being preferred under specific condition.
What is meant by flakiness index and elongation index?
Flakiness Index is the percentage by weight of particles in it, whose least dimension (i.e. thickness) is less than three-fifths of its mean dimension. Elongation Index is the percentage by weight of particles in it, whose largest dimension (i.e. length) is greater than one and four-fifths times its mean dimension.
What was the flakiness index of the aggregates tested?
An aggregate is classified as being flaky if it has a thickness (smallest dimension) of less than 0.6 of its mean sieve size. The flakiness index of an aggregate sample is found by separating the flaky particles and expressing their mass as a percentage of the mass of the sample tested.
What is the flakiness index measured in?
The flaky material passing the appropriate slot from each size range of test aggregates are added and then weighed. 6. This weight is then divided by the total weight of sample taken from different range of sizes and the ratio is expressed in percentage which is the desired flakiness index.
What is flakiness and elongated index of coarse aggregate explain with a sketch?
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. Separation of Elongated Material- Each fraction shall be gauged individually for length on a metal length gauge of the pattern shown in Fig. 4.
How is flakiness index expressed?
Flakiness Index of aggregate is the percentage by weight of aggregate particles whose least dimension is less than 0.6 of their mean dimensions. Then the flakiness index is calculated as the total weight of material passed through various thickness gauges, expressed as a percentage of total weight of the sample gauged.
Where is the flakiness test used?
This method uses to measure the Flakiness Index and Elongation index of aggregate use in the construction of Highway pavement and concrete structures. Reference:- IS 2386 (Part 1) – 1963 PDF.
What’s flakiness mean?
Definition of flakiness (Entry 2 of 2) 1 : lack of reliability : the tendency to behave or perform undependably Mobile phones make it all too easy to cancel plans at the last minute, but social flakiness isn’t a recipe for health and happiness—or good for our relationships.—
Where is flakiness used?
How do you measure flakiness index?
CALCULATIONS
- 4.1. Calculate Flakiness Index:
- Flakiness Index = Passing Sample Particle Count.
- × 100. Retained Sample.
- Particle Count. +
- Passing Sample. Particle Count.
- 4.2 Report the Flakiness Index to the nearest whole number.