ASTM C1064/C1064M-03

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C 1064/C 1064M – 03
Standard Test Method for
1
Temperature of Freshly Mixed Portland Cement Concrete
This standard is issued under the fixed designation C 1064/C 1064M; 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* device; concrete cover must also be at least three times the
nominal maximum size of the coarse aggregate.
1.1 This test method covers the determination of tempera-
4.2 Temperature Measuring Device, shall be capable of
ture of freshly mixed portland cement concrete.
accurately measuring the temperature of the freshly mixed
1.2 The values stated in inch-pound or SI units are to be
concrete to 61°F [60.5°C] throughout a range of 30° to 120°F
regarded separately as standard. Within the text, SI units are
[0° to 50°C]. The design of the temperature measuring device
shown in brackets. The values stated in each system are not
shall be such that it allows 3 in. [75 mm] or more immersion
exact equivalents; therefore, each system shall be used inde-
during operation.
pendently of the other. Combining values from the two systems
4.3 Partial immersion liquid-in-glass thermometers (and
may result in nonconformance with the specification.
possibly other types) shall have a permanent mark to which the
1.3 This standard does not purport to address all of the
device must be immersed without applying a correction factor.
safety concerns, if any, associated with its use. It is the
4.4 Reference Temperature Measuring Device, shall be
responsibility of the user of this standard to establish appro-
readable and accurate to 60.5°F [0.2°C] at the verification
priate safety and health practices and determine the applica-
points in 5.1. A certificate or report that verifies the accuracy
bility of regulatory limitations prior to use.
shall be available in the laboratory for review. Accuracy of
2. Referenced Documents liquid-in-glass reference temperature measuring devices shall
be verified once. Verification of direct-reading resistance ref-
2.1 ASTM Standards:
2
erence termperature measuring device shall be performed
C 172 Practice for Sampling Freshly Mixed Concrete
every twelve months. The certificate or report shall provide
3. Significance and Use
documentation that the reference standard used in the verifi-
cation is traceable to the National Institute of Standards and
3.1 This test method provides a means for measuring the
Technology (NIST).
temperature of freshly mixed concrete. It may be used to verify
conformance to a specified requirement for temperature of
5. Calibration of Temperature Measuring Device
concrete.
5.1 Each temperature measuring device used for determin-
3.2 Concrete containing aggregate of a nominal maximum
ing temperature of freshly mixed concrete shall be calibrated
size greater than 3 in. [75 mm] may require up to 20 min for the
annually, or whenever there is a question of accuracy. This
transfer of heat from aggregate to mortar. (See ACI Committee
3
calibration shall be performed by comparing the readings of the
207.1R Report. )
temperature measuring device at two temperatures at least
4. Apparatus
30°F [15°C] apart.
5.2 Calibration of the temperature measuring devices may
4.1 Container, shall be made of nonabsorptive material and
be made in oil or other suitable baths having uniform density
large enough to provide at least 3 in. [75 mm] of concrete in all
if provision is made to:
directions around the sensor of the temperature measuring
5.2.1 Maintain the bath temperature constant within 0.5°F
[0.2°C] during the period of the test.
1
This test method is under the jurisdiction of ASTM Committee C09 on
5.2.2 Have both the temperature and reference temperature
Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee
measuring devices maintained in the bath for a minimum of 5
C09.60 on Fresh Concrete Testing.
min before reading temperatures.
Current edition approved July 10, 2003. Published October 2003. Originally
approved in 1986. Last previous edition approved in 2001 as C 1064 – 01. 5.2.3 Continuously circulate the bath liquid to provide a
2
Annual Book of ASTM Standards, Vol 04.02.
uniform temperature.
3
Available from American Concrete Institute, Box 9094, Farmington Hills, MI
48333.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
C 1064/C 1064M – 03
5.2.4 Slightly tap
...