ASTM C142-97

Standard Test Method for Clay Lumps and Friable Particles in Aggregates

SCOPE
1.1 This test method covers the approximate determination of clay lumps and friable particles in aggregates.  
1.2 This standard does not purport to address the safety problems 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: 09-Aug-1997
• ICS: 91.100.01 - Construction materials in general
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.20 - Aggregates

Relations

• Replaced By: ASTM C142-97(2004) - Standard Test Method for Clay Lumps and Friable Particles in Aggregates
• Effective Date: 01-Aug-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
American Association of State
Designation: C 142 – 97 Highway and Transportation Officials Standard
AASHTO No. T112
Standard Test Method for
Clay Lumps and Friable Particles in Aggregates
This standard is issued under the fixed designation C 142; 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 Balances shall conform to the accuracy of the applicable
sections of Specification C 1005.
1.1 This test method covers the approximate determination
4.2 Containers—Rust-resistant containers of a size and
of clay lumps and friable particles in aggregates.
shape that will permit the spreading of the sample on the
1.2 The values given in SI units are to be regarded as the
bottom in a thin layer.
standard. The values given in parentheses are provided for
4.3 Sieves—Sieves conforming to Specification E 11.
information purposes only.
4.4 Drying Oven—An oven providing free circulation of air
1.3 This standard does not purport to address all of the
and capable of maintaining a temperature of 110 6 5°C (230 6
safety concerns, if any, associated with its use. It is the
9°F).
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Samples
bility of regulatory limitations prior to use.
5.1 Aggregate for this test method shall consist of the
2. Referenced Documents material remaining after completion of testing in accordance
with Test Method C 117. To provide the quantities designated
2.1 ASTM Standards:
in 5.3 and 5.4 it may be necessary to combine material from
C 33 Specification for Concrete Aggregates
more than one test by Test Method C 117.
C 117 Test Method for Materials Finer Than 75-μm (No.
5.2 Dry the aggregate to substantially constant mass at a
200) Sieve in Mineral Aggregates by Washing
temperature of 110 6 5°C (230 6 9°F).
C 125 Terminology Relating to Concrete and Concrete
5.3 Test samples of fine aggregate shall consist of the
Aggregates
particles coarser than a 1.18-mm (No. 16) sieve and shall have
C 1005 Specification for Reference Masses and Devices for
a mass not less than 25 g.
Determining Mass for Use in the Physical Testing of
3 5.4 Separate the test samples of coarse aggregate into
Hydraulic Cements
different sizes, using the following sieves: 4.75-mm (No. 4),
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
3 3 1
4 9.5-mm ( ⁄8-in.), 19.0-mm ( ⁄4-in.), and 37.5-mm (1 ⁄2-in.). The
poses
test sample shall have a mass not less than indicated in the
3. Significance and Use following table:
Size of Particles Making Up Mass of Test Sample,
3.1 This test method is of primary significance in determin-
Test Sample min, g
ing the acceptability of aggregate with respect to the require-
ments of Specification C 33. 3
4.75 to 9.5-mm (No. 4 to ⁄8-in.) 1000
3 3
9.5 to 19.0-mm ( ⁄8 to ⁄4-in.) 2000
3 1
19.0 to 37.5-mm ( ⁄4 to 1 ⁄2-in.) 3000
4. Apparatus
Over 37.5-mm (1 ⁄2-in.) 5000
4.1 Balance—A balance or scale accurate to within 0.1 % of
5.5 In the case of mixtures of fine and coarse aggregates,
the mass of the test sample at any point within the range of use.
separate the material on the 4.75-mm (No. 4) sieve, and
prepare the samples of fine and coarse aggregates in accor-
dance with 5.3 and 5.4.
This test method is under the jurisdiction of ASTM Committee C-9 on Concrete
and Concrete Aggregates and is the direct responsibility of Subcommittee C09.20 on
6. Procedure
Normal Weight Aggregates.
Current edition approved Aug. 10, 1997. Published October 1998. Originally
6.1 Determine the mass of the test sample to the accuracy
published as C 142 – 38 T. Last previous edition C 142 – 78 (1990).
specified in 4.1 and spread it in a thin layer on the bottom of the
Annual Book of ASTM Standards, Vol 04.02.
3 container, cover it with distilled water, and soak it for a period
Annual Book of ASTM Standards, Vol 04.01.
Annual Book of ASTM Standards, Vol 14.02. of 24 6 4 h. Roll and squeeze particles individually between
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
...