ASTM D4791 PDF

This standard is issued under the fixed designation D; the number 1 This test method is under the jurisdiction of ASTM Committee D04 on Road. RELEVANT DOCUMENTS. ASTM D Standard Test Method for Flat Particles, Elongated Particles, or Flat and. Elongated Particles in Coarse Aggregate. The standard flat and elongated particles in coarse aggregate test is: ASTM D Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse.

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The standard flat and elongated particles in aetm aggregate test is: Method A is a reflection of the original procedure as developed prior to Superpave and is intended for all non-Superpave applications. Plunger is mounted on support stand, permitting plunger to lower and raise freely. The apparatus consists of a stainless steel hopper, stand, measure and strike-off bar and a mm square glass plate atsm calibration of the measure.

Particle d elongated when its length longest dimension is more than 1. The particles shape of course aggregates influences the properties of some construction materials and may affect their placement and consolidation.

It is recommended that the desiredprocedure be reviewed carefully prior to conducting the test. Ratio desired is obtained by selecting one of four e4791 positions: Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness.

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In operation, the aggregate is allowed to free-fall mm from the funnel bottom into a mm diameter by mm high axtm measure. Furnished with one extra brass scratch rod. For determining flakiness index. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part x the standard.

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

The mass of all flaky particles passing appropriate slots as percent of the sample is the flakiness index. Historical Version s — view previous versions of standard.

specification of flat and elongated particles

Indicates the angularity, sphericality, and workability of fine aggregate in a mixture. The values given in parentheses are mathematical conversions to SI units that are asgm for information only and are not considered standard. Gauge satm seven labeled slots for rapid hand trying of particles from each of the seven sieve cuts. When sieve mesh sizes are referenced, the alternate inch-pound designations are provided for information purposes and enclosed in parenthesis.

Link to Active This link will always route to ast current Active version of the standard. Moisture Density Gauges Rentals. Aggregate to be classified is separated into seven sieve fractions from 63 to 6.

Specification Of Flat And Elongated Particles

Aetm to determine the uncompacted void content of a fine aggregate sample. The mass of all elongated particles failing to pass between pins as percent of aastm sample is the elongation index.

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Includes ml brass cylindrical measure, funnel assembly, funnel stand, and glass plate for calibration. Two procedures, Method A and Method B, are presented in this standard. Method B is a comparison of the maximum particle dimension to the minimum particle dimension and is intended for use with Superpave specifications.

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. 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. Order overflow pan and material handling scoop separately.

GILSON ASTM D OPERATING MANUAL Pdf Download.

Six labeled openings between pairs of metal pins measure particle from each of the six sieve cuts below 50mm. Home Contact Privacy Rentals.

Used to determine the void content of uncompacted coarse aggregates used in HMA applications. The excess heaped aggregate is struck of using the included bar, awtm mass is measured, and the void content is computed. 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.