**Elongation Gauge Length**. The flakiness of aggregate is determined by measuring the thickness of individual particles. The length (elongation) gauge is used for determining the elongation index of aggregates.

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When gauge marks or extensometers are used to define a specific test section. only this length is used in the calculation. otherwise the distance between the grips is used as the initial gauge length. The particle is elongated when its length is more than 1.8 o the midsize of the sieve fraction. The extensometer is assembled on the specimen to measure the elongation δ of the gauge section with the length of 20 mm.

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When gauge marks or extensometers are used to define a specific test section. only this length is used in the calculation. otherwise the distance between the grips is used as the initial gauge length. Original gauge length (l) gauge length before application of force. measured at ambient temperature (see fig.

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Gauge length (l) length of the cylindrical or prismatic portion of the test piece on which elongation is measured. Hence we offer thickness gauge and length gauge to check flakiness and elongation index of the aggregate respectively.

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Gauge length (l) length of the cylindrical or prismatic portion of the test piece on which elongation is measured. A. is the required elongation on gauge length lo;

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The extensometer is assembled on the specimen to measure the elongation δ of the gauge section with the length of 20 mm. Hence we offer thickness gauge and length gauge to check flakiness and elongation index of the aggregate respectively.

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Elongation corresponding to the above gauge lengths axe calculated by adding. The aggregate to be classified is separated into six sieve fractions from 6.3 to 50 mm and each fraction is examined separately.

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The flakiness of aggregate is determined by measuring the thickness of individual particles. Elongation according to different measurement methods divided into fixed multiple of a5. a10 and scaling from the a50. a80. a100 and so on.

#### Elongation Measured In A Specimen Whose Gage Length Is 5.65 Times Square Root Of Its Gage Area.

Percentage elongation can be expressed as; A5 is the ratio of the original specimen gauge length to diameter ratio of 5. a10 is the ratio of the original specimen gauge length to diameter ratio of 10; The elongation is expressed as a percentage. and is reported out to two significant figures.

#### Since Elongation Depends On The Testing Gauge Length. When Reporting Elongation. The Gauge Length Must Also Be Reported (The Longer The Gauge Length. The Lower The Measured Elongation).

Original gauge length (l) gauge length before application of force. measured at ambient temperature (see fig. Hence we offer thickness gauge and length gauge to check flakiness and elongation index of the aggregate respectively. Fixed gauge lengths of 50. 80. 100 and 200 mm are used ;

#### Proportional Gauge Lengths Of Are Also Used For Flat And Round Test Pieces. Where K May Be One Of A Number Of Values. I.e.

A is the elongation on a gauge length of 5.656 which is the internationally accepted gauge length; The length (elongation) gauge is used for determining the elongation index of aggregates. One half interval at both sides of the interval where fracture occured are added to.

#### A. Is The Required Elongation On Gauge Length Lo;

Gauge length (l) length of the cylindrical or prismatic portion of the test piece on which elongation is measured. The increase in a samples gauge length measured after a rupture or break divided by the samples original gauge length is referred to as elongation. Used for determination of elongation index of aggregates.

#### So And Lo Are Defined In Table 1.

The aggregate to be classified is separated into six sieve fractions from 6.3 to 50 mm and each fraction is examined separately. Final gauge length (l) gauge length after rupture. measured at ambient temperature (see fig. Expressed in terms of 46 the formula becomes jso 0.127 a. = 1.19a (1..