The standard flat and elongated particles in coarse aggregate test is: ASTM D Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse. 13 Feb ELONGATED PARTICLES IN COARSE AGGREGATE. Conduct this procedure according to ND D Consult the current edition of ASTM for. GeoTesting Express is a provider of Aggregate Testing Services – ASTM D, Standard Test Method for Flat Particles, Elongated Particles, or Flat and.

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ASTM D4791 – 10

Moisture Density Gauges Rentals. Six labeled openings between pairs of metal pins measure particle from each of the six sieve cuts below 50mm.

Indicates the angularity, sphericality, and workability of fine aggregate in a mixture. The mass of all elongated particles failing to pass between pins as percent of the sample is the elongation index.

Link to Active This link will always route to the current Active version of the standard. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness. Furnished astmm one extra brass scratch rod. The excess heaped aggregate is struck of using the included bar, the mass is measured, and the void content is computed.

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Method B is a comparison of the maximum particle dimension to the minimum particle dimension and is intended for use with Superpave specifications.

Two procedures, Method A and Method Ast, are presented in this standard. Particle is elongated ast its length longest dimension is more than 1. Ratio desired is obtained by selecting one of four adjustable positions: Historical Version s – view previous versions of standard.

Proportional Caliper Device

Includes ml brass cylindrical measure, funnel assembly, funnel stand, and glass plate for calibration. The mass of all flaky particles passing appropriate slots as percent of the sample is the flakiness index.

Particle is flaky astj its thickness smallest dimension dd4791 less than 0. In operation, the aggregate is allowed to free-fall mm from the funnel bottom into a mm diameter by mm high cylindrical measure.

For determining flakiness index. When used on aggregates of a known size, the void content provides the user with an indication of the angularity, sphericity and surface texture as compared to other course aggregates of the same grading.

Method A is a reflection of the original procedure as developed prior to Superpave and is intended for all non-Superpave applications. This test method provides a means for checking compliance with specifications that limit such particles or to determine the relative shape characteristics of coarse aggregates.

Order overflow pan and material handling scoop separately. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Use to determine the uncompacted void content of a fine aggregate sample.


Plunger is mounted on support stand, permitting plunger to lower and raise freely. Aggregate to be classified is separated into seven sieve fractions from 63 to 6. The apparatus asym of a stainless steel hopper, stand, measure and strike-off bar and a mm square glass plate for calibration of the measure.

When sieve mesh sizes are referenced, the alternate inch-pound designations are provided for information purposes and enclosed in parenthesis. Scratch Hardness Tester— H Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness.

Home Contact Privacy Rentals. It is recommended that the desiredprocedure be reviewed carefully prior to conducting the test. The particles shape of course aggregates influences the properties of some construction materials and may affect their placement and consolidation. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Gauge has seven labeled slots for rapid hand trying of ast, from each of the seven sieve cuts. Used to determine the void content of uncompacted coarse aggregates used in HMA applications.