Typical Flakiness Index Values

Typical values on the flakiness index range from 4 to 9% in RCA, 10% to 20% in RMA and 15 to 30% in RMCA. The flakiness index increases with the amount of crushed ceramic particles from bricks or tiles, but the RMA is very well compacted, because elongated particles are broken and the flakiness index decreases during its compaction process.

The value of the flakiness index is calculated from the expression: Flakiness Index = 100 x M 3 / M 2 Express the Flakiness Index to the nearest whole number. Where, M 2 is the total mass of test portion M 3 is the mass of the flaky portion. Chapter 7 Standard Test Procedures Tests For Aggregates And Bricks

Flakiness Index = Weight of aggregate passed through width gauge 10 mm to 6.3 mm (W2) / Total weight of aggregate sample taken (W1) = (W2/W1) x 100. For example, Weight of aggregate passed through width gauge of 10 mm to 6.3mm(W2) = 200 gm and Total weight of aggregate sample = 1000 gm. Flakiness Index = (200 gm / 1000 gm) x 100 = 20%. Result :

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 …

23-02-2010· Elongation Index = (Y 1 + Y 2 + …) / (W 1 + W 2 + ….) X 100. Results: Flakiness Index = Elongation Index = Recommended Values of Flakiness Index and Elongation Index. The shape tests give only a rough idea of the relative shapes of aggregates. Flaky and elongated particles should be avoided in pavement construction, particularly in surface ...

Elongation Index = (Y 1 + Y 2 + …) / (W 1 + W 2 + ….) X 100. Results: Flakiness Index = Elongation Index = Recommended Values of Flakiness Index and Elongation Index. The shape tests give only a rough idea of the relative shapes of aggregates. Flaky and elongated particles should be avoided in pavement construction, particularly in surface ...

A BS 1241 specifies a Flakiness Index not exceeding 30 irrespective of the sie of the aggregates. b Maximum permitted value of Elongation Index is 35. Both flakiness and Elongation tests are not applicable to sies smaller than 6.3mm 14 sieve. 2.3.

Determination of the Flakiness and the Elongation Index for the Given Aggregate Sample.

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 …

Flakiness Index Sieve Set, BS. UTA-0411. Flakiness Index Sieve BS 4.9x30 mm Slot Size. UTA-0412. Flakiness Index Sieve BS 7.2x40 mm Slot Size. UTA-0413 . Flakiness Index Sieve BS 10.2x50 mm Slot Size. UTA-0414 . Flakiness Index Sieve BS 14.4x60 mm Slot Size. UTA-0415. Flakiness Index Sieve BS 19.7x80 mm Slot Size. UTA-0416. Flakiness Index ...

Flakiness index test is used to determine the particle shape of the course aggregate. The particle shape of the aggregates is obtained by the percentages of flaky and elongated particles accommodate in it. For base course and construction of cement concrete types, the presence of flaky and elongated particles are considered undesirable.

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.

Flakiness and Elongation Index EXPERIMENT NO.1: Determination of the flakiness and the elongation index for the given aggregate. sample. SCOPE & SIGNIFICANCE:. This test is used to determine the particle shape of the aggregate and each particle shape being preferred under specific conditions.

Thickness Gauge (Flakiness Index) is a slotted stainless steel gauge for rapid hand trying of particles from the seven sieve fractions to determine the flakiness index. Length Gauge (Elongation Index) has six labeled openings between metal pins for measuring the length of particles from each of the six sieve cuts below 50mm, for elongation index determinations.

Note the lower flakiness values in the EN recommended categories are not indicative of tighter tolerances, but arise from the use of different equipment (round bar sieves, different length/width ratio). The new sieves produce values which in all cases are lower than those obtained with the old slotted BS flakiness sieves. SI. Shape index

A BS 1241 specifies a Flakiness Index not exceeding 30 irrespective of the sie of the aggregates. b Maximum permitted value of Elongation Index is 35. Both flakiness and Elongation tests are not applicable to sies smaller than 6.3mm 14 sieve. 2.3.

Determination of the Flakiness and the Elongation Index for the Given Aggregate Sample.

Thickness Gauge (Flakiness Index) is a slotted stainless steel gauge for rapid hand trying of particles from the seven sieve fractions to determine the flakiness index. Length Gauge (Elongation Index) has six labeled openings between metal pins for measuring the length of particles from each of the six sieve cuts below 50mm, for elongation index determinations.

THEORY Flakiness index Aggregate particles are classified as flaky when they have a thickness (smallest dimension) 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 expressing their mass as a percentage of the mass of the sample tested.

Flakiness index and Elongation Index of Coarse Aggregates

Utest Material Testing Equipment . Standards. BS 812-105.1. Thickness Gauge is used to determine if the aggregate particles are to be considered as flaky, i.e. …

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.; Flakiness & Elongation of Aggregates is measured ...

03-01-2005· 1223 FLAKINESS INDEX FLH T 508 (Mn/DOT Modified) 1223.1 Scope The Flakiness Index test determines the percentage of flat particles in a seal coat aggregate. 1223.2 APPARATUS A. A metal plate approximately 0.0625 inches thick with slotted openings conforming to the design and dimensions shown in Figure 1.

Define flakiness. flakiness synonyms, flakiness pronunciation, ... Various tests such as gradation, optimum moisture content, soundness test, aggregate impact value, flakiness index and elongation index, Los Angeles abrasion value, specific gravity and water absorption were performed in accordance with AASHTO, ...

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