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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specification of flat and elongated particles

The excess heaped aggregate is struck of using the included bar, the mass is measured, and the void content is computed. Particle is flaky when its thickness smallest dimension is less than 0. It is recommended that the desiredprocedure be reviewed carefully prior to conducting the test. Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness.


Link to Active This link will always route to the current Active version of the standard. Includes ml brass cylindrical measure, funnel assembly, funnel stand, wstm glass plate for calibration. The apparatus consists of a stainless steel hopper, stand, measure and strike-off bar and a mm square glass plate for calibration of the measure.

The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. The particles shape of course aggregates influences the properties of some construction materials and may affect their placement and consolidation.


Two procedures, Method A and Method C4791, are presented in this standard. Method A is a reflection of the original procedure as developed prior to Superpave and is intended for all non-Superpave applications.

Furnished with one extra brass scratch rod. Use to determine the uncompacted void content of a fine aggregate sample. When used on aggregates f4791 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.

Particle is elongated when its length longest dimension is more than 1. The mass of all flaky particles passing appropriate slots as percent d47791 the sample is the flakiness index.

Proportional caliper, Aggregates testing equipment, Controls

Indicates the angularity, sphericality, and workability of fine aggregate in a mixture. Plunger is mounted on support stand, permitting plunger to lower and raise freely. The mass of all elongated particles failing to pass between pins as percent of the sample is the elongation index. Gauge has seven labeled slots for rapid hand trying of particles from each of the seven sieve cuts.

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.

Moisture Density Gauges Rentals. Aggregate to be classified is separated into awtm sieve fractions from 63 to 6. Ratio desired is obtained by selecting one of four adjustable positions: Method B is a comparison of the maximum particle ast, to the minimum particle dimension and is intended for use with Superpave specifications.


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. Scratch Hardness Tester— H Scratch Atm Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness.

For determining flakiness index. When sieve mesh sizes are referenced, the alternate inch-pound designations are provided for information purposes and enclosed in parenthesis.


Home Contact Privacy Rentals. Historical Version s – view previous versions of standard. Order overflow pan and material handling scoop separately.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Used to determine the void xstm of uncompacted coarse aggregates used in HMA applications. In operation, the aggregate is allowed to free-fall mm from d47791 funnel bottom into a mm diameter by mm high cylindrical measure. Six labeled openings between pairs of metal pins measure particle from each of the six sieve cuts below 50mm.