ASTM D4791 PDF

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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Moisture Density Gauges Rentals. The mass of all elongated particles failing to pass between pins as percent of the sample is the elongation index.

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Use to determine the uncompacted void content of a fine aggregate sample. Six labeled openings between pairs of metal pins measure particle from each of the six sieve cuts below 50mm.

Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness. Method B is a comparison of the maximum particle dimension to the minimum particle dimension and is intended for atm with Superpave specifications. The particles shape of course aggregates influences the properties of some construction materials and may affect their placement and consolidation.

Testing equipment for ASTM D | Matest

The mass of all flaky particles passing appropriate slots as percent of the sample is the flakiness index. Particle is elongated when its length longest dimension is more than 1. Home Contact Privacy Rentals. When sieve mesh sizes are referenced, the alternate inch-pound designations are provided for information purposes and enclosed in parenthesis.

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Plunger is mounted on support stand, permitting plunger to lower and raise freely.

Historical Version s – view previous versions of standard. Aggregate to be classified is separated into seven sieve fractions from 63 to 6. Particle is flaky when its thickness smallest dimension is less than 0. For determining flakiness index.

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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. Used to determine the void content of uncompacted coarse aggregates used in HMA applications.

In operation, the aggregate is allowed to free-fall mm from the funnel bottom into a mm v4791 by mm high cylindrical measure.

The values given in parentheses are mathematical conversions to SI units that are provided for information only and x4791 not considered standard. Includes ml brass cylindrical measure, funnel assembly, funnel stand, and 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.

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. It is recommended that the desiredprocedure be reviewed carefully prior to conducting the d47991.

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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. Gauge has seven labeled slots for rapid hand trying of particles from each of atsm seven sieve cuts.

Classification

Two procedures, Method A and Method B, are presented in this standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are asfm provided as part of the standard. Indicates the angularity, sphericality, and workability of fine aggregate in a mixture. Ratio desired is obtained by selecting one of four astn positions: Link to Active This link will always route to the current Active version of the standard.

The excess heaped aggregate is struck of using the included bar, the mass is measured, and the void content is computed. Order overflow pan and material handling scoop separately. Scratch Hardness Tester— H Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of ast hardness.

Method A is a reflection of the original procedure as developed prior to Superpave and is intended for all non-Superpave applications.

E4791 with one extra brass scratch rod.