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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Includes ml brass cylindrical measure, funnel assembly, funnel stand, and glass plate for calibration. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the e4791 of regulatory limitations prior to use.

Plunger is mounted on support stand, permitting plunger to lower and raise freely. Scratch Hardness Tester— 4d791 Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness. Historical Version s – view previous versions of standard.

Home Contact Privacy Rentals. The mass of all flaky particles passing appropriate slots as percent of the sample is the flakiness index. 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.

Particle is flaky when its thickness smallest dimension is less than 0.

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The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Method B is a comparison of the maximum particle dimension to the minimum particle dimension and is intended for use with Superpave specifications.

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specification of flat and elongated particles

Used to determine the void content of uncompacted coarse aggregates used in HMA applications. Use to determine the uncompacted void content of a fine aggregate sample. The particles shape of course aggregates influences the properties of some construction materials and may affect their placement and consolidation.

When sieve mesh sizes are referenced, the alternate inch-pound designations are provided for information purposes and enclosed in parenthesis. Gauge has seven labeled slots for rapid hand trying of particles from each of the seven sieve cuts.

Two procedures, Method A and Method B, are presented in this standard. It is recommended that the desiredprocedure be reviewed carefully prior asym conducting the test. Indicates the angularity, sphericality, and workability of fine aggregate in a mixture. Moisture Density Gauges Rentals. For determining flakiness index. The excess heaped aggregate is struck of using the included bar, the mass is measured, and the void content is computed.

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. Furnished with one extra brass scratch rod. Aggregate to be classified is separated into seven sieve fractions from 63 to 6.

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Ratio desired is obtained by selecting one of four adjustable positions: Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness.

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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. The mass of all elongated particles xstm to pass between pins as percent of the sample is the elongation index.

Method A is a reflection of the original procedure as developed prior to Superpave and is intended for all non-Superpave applications. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Active version of the standard. Six labeled openings between pairs of metal pins measure particle from each of the six sieve cuts below 50mm.

Particle is elongated when its length longest dimension is more than 1. In operation, the aggregate is allowed to free-fall mm from the funnel bottom into a mm diameter by mm high cylindrical measure.