ASTM D4791-05

Standard Test Method for Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse Aggregate

SCOPE
1.1 This test method covers the determination of the percentages of flat particles, elongated particles, or flat and elongated particles in coarse aggregates.
1.2 The values stated in inch-pound units are to be regarded as the standard except in regard to sieve size and the size of aggregate, which are given in SI units in accordance with Specification E 11. The SI units in parentheses are for information purposes only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

General Information

• Status: Historical
• Publication Date: 14-Jul-2005
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: D04 - Road and Paving Materials
• Drafting Committee: D04.51 - Aggregate Tests

Relations

• Replaces: ASTM D4791-99 - Standard Test Method for Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse Aggregate
• Effective Date: 15-Jul-2005
• Replaced By: ASTM D4791-05e1 - Standard Test Method for Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse Aggregate
• Effective Date: 15-Jul-2005
• Referred By: ASTM D1139/D1139M-22 - Standard Specification for Aggregate for Single or Multiple Asphalt Surface Treatments
• Effective Date: 15-Jul-2005
• Referred By: ASTM D7064/D7064M-21 - Standard Practice for Open-Graded Friction Course (OGFC) Asphalt Mixture Design
• Effective Date: 15-Jul-2005
• Referred By: ASTM D7564/D7564M-16 - Standard Practice for Construction of Asphalt-Rubber Cape Seal
• Effective Date: 15-Jul-2005
• Referred By: ASTM D6932/D6932M-21 - Standard Guide for Materials and Construction of Open-Graded Friction Course Plant Asphalt Mixtures
• Effective Date: 15-Jul-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D4791–05
Standard Test Method for
Flat Particles, Elongated Particles, or Flat and Elongated
1
Particles in Coarse Aggregate
This standard is issued under the fixed designation D 4791; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.1 flat and elongated particles of aggregate—those par-
ticles having a ratio of length to thickness greater than a
1.1 This test method covers the determination of the per-
specified value.
centages of flat particles, elongated particles, or flat and
3.1.2 flat or elongated particles of aggregate—those par-
elongated particles in coarse aggregates.
ticlesofaggregatehavingaratioofwidthtothicknessorlength
1.2 The values stated in inch-pound units are to be regarded
to width greater than a specified value (see Terminology
as the standard except in regard to sieve size and the size of
C 125).
aggregate, which are given in SI units in accordance with
3.1.3 length—maximum dimension of the particle.
Specification E11. The SI units in parentheses are for infor-
3.1.4 thickness—maximum dimension perpendicular to the
mation purposes only.
length and width.
1.3 This standard does not purport to address all of the
3.1.5 width—maximum dimension in the plane perpendicu-
safety concerns, if any, associated with its use. It is the
lar to the length
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use.
4.1 Individual particles of aggregate of specific sieve sizes
2. Referenced Documents are measured to determine the ratios of width to thickness,
2
length to width, or length to thickness.
2.1 ASTM Standards:
C 125 Terminology Relating to Concrete and Concrete
5. Significance and Use
Aggregates
5.1 Flat or elongated particles of aggregates, for some
C 136 Test Method for Sieve Analysis of Fine and Coarse
construction uses, may interfere with consolidation and result
Aggregates
in harsh, difficult to place materials.
C 670 Practice for Preparing Precision and Bias Statements
5.2 This test method provides a means for checking com-
for Test Methods for Construction Materials
pliance with specifications that limit such particles or to
C 702 Practice for Reducing Samples of Aggregate to
determine the relative shape characteristics of coarse aggre-
Testing Size
gates.
D75 Practice for Sampling Aggregates
E11 Specification for Wire-Cloth and Sieves for Testing
6. Apparatus
Purposes
6.1 The apparatus used shall be equipment suitable for
testing aggregate particles for compliance with the definitions
3. Terminology
in 3.1, at the dimensional ratios desired.
3.1 Definitions:
6.1.1 Proportional Caliper Device—The proportional cali-
per devices illustrated in Fig. 1, Fig. 2, and Fig. 3 are examples
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
of devices suitable for this test method. The device illustrated
and Paving Materials and is the direct responsibility of Subcommittee D04.51 on
in Fig. 1 and Fig. 2 consists of a base plate with two fixed posts
Aggregate Tests.
and a swinging arm mounted between them so that the
Current edition approved July 15, 2005. Published August 2005. Originally
approved in 1989. Last previous edition approved in 1999 as D 4791 – 99. openings between the arms and the posts maintain a constant
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ratio. The axis position can be adjusted to provide the desired
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
ratio of opening dimensions. Fig. 1 illustrates a device on
Standards volume information, refer to the standard’s Document Summary page on
which ratios of 1:2, 1:3, 1;4, and 1:5 may be set. The device
the ASTM website.
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D4791–05
illustrated in Fig. 3 contains several fixed posts and has the
capability of measuring various ratios simultaneously.
6.1.1.1 Verification of Ratio—The ratio settings on the
proportional caliper device shall be verified by the use of a
machined block, micrometer, or other appropriate device.
6.1.2 Balance—The balance or scales used shall be accurate
to 0.5 % of the mass of the sample.
7. Sampling
7.1 SamplethecoarseaggregateinaccordancewithPractice
D75. The mass of the field sample shall be the mass shown in
PracticeD7
...