ASTM C70-06

Standard Test Method for Surface Moisture in Fine Aggregate

SIGNIFICANCE AND USE
This test method is not widely used. However, it is a convenient procedure for field or plant determination of moisture content of fine aggregate if specific gravity values are known and if drying facilities are not available. It can be used to adjust the aggregate mass for moisture content and to determine surface moisture contribution to mixing water in portland cement concrete.
The accuracy of the test method depends upon accurate information on the bulk specific gravity of the material in a saturated surface-dry condition.
SCOPE
1.1 This test method covers field determination of the amount of surface moisture in fine aggregate by displacement in water.
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.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are provided for information purposes only.

General Information

• Status: Historical
• Publication Date: 14-Feb-2006
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.20 - Aggregates

Relations

• Replaces: ASTM C70-94(2001) - Standard Test Method for Surface Moisture in Fine Aggregate
• Effective Date: 15-Feb-2006
• Referred By: ASTM C1810/C1810M-22 - Standard Guide for Comparing Performance of Concrete-Making Materials Using Mortar Mixtures
• Effective Date: 15-Feb-2006
• Referred By: ASTM C128-22 - Standard Test Method for Relative Density (Specific Gravity) and Absorption of Fine Aggregate
• Effective Date: 15-Feb-2006
• Referred By: ASTM C192/C192M-19 - Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory
• Effective Date: 15-Feb-2006

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C70 − 06 AmericanAssociation State
Highway and Transportation Officials Standard
AASHTO No.: T142
Standard Test Method for
1
Surface Moisture in Fine Aggregate
This standard is issued under the fixed designation C70; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) 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* 3.2 The accuracy of the test method depends upon accurate
information on the bulk specific gravity of the material in a
1.1 This test method covers field determination of the
saturated surface-dry condition.
amount of surface moisture in fine aggregate by displacement
in water.
4. Apparatus
1.2 This standard does not purport to address all of the
4.1 Balance,havingacapacityof2kgormoreandsensitive
safety concerns, if any, associated with its use. It is the
to 0.5 g or less.
responsibility of the user of this standard to establish appro-
4.2 Flask—Asuitable container or flask, preferably of glass
priate safety and health practices and determine the applica-
or noncorrosive metal. The container may be a pycnometer, a
bility of regulatory limitations prior to use.
volumetric flask, a graduated volumetric flask, or other suitable
1.3 The values stated in SI units are to be regarded as the
measuring device. The volume of the container shall be from
standard. The values in parentheses are provided for informa-
two to three times the loose volume of the sample. The
tion purposes only.
container shall be so designed that it can be filled to the mark,
or the volume of its contents read, within 0.5 mL or less.
2. Referenced Documents
2
5. Sample
2.1 ASTM Standards:
C128 Test Method for Density, Relative Density (Specific
5.1 Selectarepresentativesampleofthefineaggregatetobe
Gravity), and Absorption of Fine Aggregate
tested for surface moisture content. It shall weigh not less than
C566 Test Method forTotal Evaporable Moisture Content of
200 g. Larger samples will yield more accurate results.
Aggregate by Drying
6. Procedure
C670 Practice for Preparing Precision and Bias Statements
for Test Methods for Construction Materials
6.1 The surface water content may be determined either by
mass or volume. In each case the test shall be made at a
3. Significance and Use
temperature range of 18 to 29°C (65 to 85°F).
3.1 This test method is not widely used. However, it is a
6.2 Determination by Mass—Determine the mass of the
convenient procedure for field or plant determination of
container, in grams, filled to the mark with only water. Before
moisture content of fine aggregate if specific gravity values are
placing the sample into the container, adjust the level of the
known and if drying facilities are not available. It can be used
water so that it will be sufficient to cover the sample without
to adjust the aggregate mass for moisture content and to
going over the original mark. Introduce the weighed sample of
determine surface moisture contribution to mixing water in fine aggregate into the container and remove the entrained air.
portland cement concrete.
Fill the container to the original mark, and determine the mass
in grams. Calculate the amount of water displaced by the
sample, as follows:
1
This test method is under the jurisdiction of ASTM Committee C09 on
M 5 M 1M 2 M (1)
d c s
Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee
C09.20 on Normal Weight Aggregates.
where:
Current edition approved Feb. 15, 2006. Published March 2006. Originally
M = mass of water displaced by the sample, g,
d
approved in 1970. Last previous edition approved in 2001 as C70 – 94(2001). DOI:
M = mass of container filled to the mark with water, g,
10.1520/C0070-06.
c
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or M = mass of sample, g, and
s
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
M = mass of container and sample, filled to the mark with
Standards volume information, refer to the standard’s Document Summary page on
water, g.
the ASTM website.
*A Summary of Changes section appears at the end of this standard
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C70−06
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C70−06
6.3 Determination by Volume—Measure a volume of water,
P = absorption of the fine aggregate, %, determined in
a
in millilitres, sufficient to cover the sample and place in the
accordance with Test Method C128.
container. Introduce the weighed sample of fin
...