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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The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

Historical Version s – view previous versions of standard. Indicates the angularity, sphericality, and workability of fine aggregate in a mixture. 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.

Proportional caliper

Scratch Hardness Tester— H Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness. Gauge has seven labeled slots for rapid hand trying of particles from each of the seven sieve cuts. The mass of all elongated particles failing to pass between pins as percent of the sample is the elongation index. Aggregate to be classified is separated into seven sieve fractions from 63 to 6.

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

Link to Active This link will always route to the current Active version of the standard. Used to determine the void content of uncompacted coarse aggregates used in HMA applications.

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

Moisture Density Gauges Rentals. Use to determine the uncompacted void content of a fine aggregate sample. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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 apparatus consists of a stainless steel hopper, stand, measure and strike-off bar and a mm square glass plate for calibration of the measure.

Proportional caliper, Aggregates testing equipment, Controls

Six labeled openings between pairs of metal pins measure particle from each of the six sieve cuts below 50mm. Plunger is mounted on support stand, permitting plunger to lower and raise freely. It is recommended that the desiredprocedure be reviewed carefully prior to conducting the test. Home Contact Privacy Rentals. In operation, the aggregate is allowed to free-fall mm from the funnel bottom into a mm diameter by mm high cylindrical measure.

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Particle is flaky when its thickness smallest dimension is less than 0. Furnished with one extra brass scratch rod. Scratch Hardness Tester determines quantity of soft particles in coarse aggregates on basis of scratch hardness. Particle is elongated when its length longest dimension is more than 1. For determining 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.

Ratio desired is obtained d4719 selecting one of four adjustable positions: The particles shape of course aggregates influences the properties of some construction materials and may affect their placement and consolidation.

The excess heaped aggregate is struck of using the included bar, the mass is measured, and the void content is computed. Method B is a comparison of the maximum particle dimension to the minimum d47791 dimension and is intended for use with Superpave specifications.

Order overflow pan and material handling scoop separately. When sieve mesh sizes are referenced, the alternate inch-pound designations are provided for information purposes and enclosed in parenthesis.