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ASTM C470/C470M-98

(Specification)

Standard Specification for Molds for Forming Concrete Test Cylinders Vertically

Standard Specification for Molds for Forming Concrete Test Cylinders Vertically

SCOPE
1.1 This specification covers molds for use in forming cylindrical concrete specimens. The provisions of this specification include the requirements for both reusable and single-use molds.  Note 1-Sizes included are molds having diameters from 2 in. (51 mm) to 36 in. (914 mm). Dimensions of commonly used single-use molds are given in Fig. 1.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI values in parentheses are for information only.  
1.3 The following safety hazards caveat pertains only to the test method described in this specification: 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
09-Jul-1998
ICS
91.100.30 - Concrete and concrete products
Technical Committee
C09 - Concrete and Concrete Aggregates
Drafting Committee
C09.61 - Testing for Strength
Current Stage
Ref Project

Relations

Replaced By
ASTM C470/C470M-02 - Standard Specification for Molds for Forming Concrete Test Cylinders Vertically
Effective Date
10-Aug-2002

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ASTM C470/C470M-98 - Standard Specification for Molds for Forming Concrete Test Cylinders VerticallyASTM C470/C470M-98 - Standard Specification for Molds for Forming Concrete Test Cylinders Vertically
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ASTM C470/C470M-98 - Standard Specification for Molds for Forming Concrete Test Cylinders Vertically
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Standards Content (Sample)

STD.ASTtl C'470/C~7UM-ENGt 1978 & 0759530 llb3!iL,Ll, b'i=l W
Designation: C 470/C 470M - 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards CopyrIght ASTM
Standard Specification for
Molds for Forming Concrete Test Cylinders Vertically’
This standard is issued under the fixed designation C 470; the number immediately following the designation indicate5 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.
1. Scope
top open to receive the concrete. They shall be made of
materials that do not react with concrete containing portland or
1.1 This specification covers molds for use in forming
other hydraulic cements. They shall be watertight and suffi-
cylindrical concrete specimens. The provisions of this specifi-
ciently strong and tough to permit their use without tearing,
cation include the requirements for both reusable and single-
crushing, or deforming.
use molds.
NOTE 2-Certain single-use molds may require the use of a special
NOTE l-Sizes included are molds having diameters from 50 mm [2
device such as a tube of heavy-gage metal around the mold during
in.] to 900 mm [36 in.]. Dimensions of commonly used single-use molds
molding to maintain the dimensional tolerances specified in 3.1.2.
are given in Fig. 1.
3.1.2 Molds shall have a nominal inside height equal to
1.2 The values stated in either SI units or in other units shall
twice the nominal inside diameter. The diameter of a mold,
be regarded separately as standard. The values stated in each
consisting of the average of two measurements taken at right
system may not be exact equivalents; therefore, each system
angles to each other at the top of the mold, shall not differ from
must be used independently of the other, without combining in
the nominal diameter by more than 1 %. The height, deter-
any way. The inch-pound units are shown in brackets.
mined by averaging two measurements taken 180” apart, shall
1.3 The following safety hazards caveat pertains only to the
not differ from the nominal height by more than 2 %. The
test method described in this specification: This standard does
planes of the top rim of the mold and the bottom shall be
not purport to address all of the sgfety concerns, if any,
perpendicular to the axis of the mold within 0.5 degrees-
associated with its use. It is the responsibility of the user of this
approximately equivalent to 3 mm in 300 mm [l/a in. in 12 in.].
standard to establish appropriate safety and health pructices
No diameter of a mold shall differ from any other diameter of
and determine the applicability of regulatory limitations prior
the same mold by more than 2 % except that molds that fail to
to use.
meet this requirement may be used when the user is able to
1.4 The text of this standard references notes and footnotes
demonstrate that no diameter of hardened concrete specimen
which provide explanatory material. These notes and footnotes
produced in a similar mold differs from any other diameter on
(excluding those in tables and figures) shall not be considered
the same specimen by more than 2 %. See Note 2.
as requirements of the standard.
3.1.3 The bottom inside surface of the mold shall not depart
2. Referenced Documents
from a plane by more than 2 mm in 150 mm [%h in. in 6 in.]
(1 % of the diameter of the mold).
2.1 ASTM Standards:
C 3 UC 3 1M Practice for Making and Curing Concrete Test
4. Reusable Molds
Specimens in the Field’
4.1 Reusable molds are those which are designed to be used
C 33 Specification for Concrete Aggregates*
more than a single time. Reusable molds shall be made of
C 192/C 192M Practice for Making and Curing Concrete
nonabsorptive materials, and they may be either one piece or
Test Specimens in the Laboratory*
constructed of several pieces (Note 3). All reusable molds shall
D 256 Test Method for Determining the Pendulum Impact
be tested for water leakage as described in 7.4 and for strength
Resistance of Notched Specimens of Plastics”
as described in 7.3.1.
D 570 Test Method for Water Absorption of Plastics3
4.2 Reusable molds shall be provided with a closure or base
3. General Requirements
on the lower end at right angles to the axis of the cylinder.
Molds may be single piece molds or made from castings with
3.1 The following provisions apply to both reusable and
a separate detachable base plate or a base that is an integral part
single-use molds:
of the sidewall. The mold shall be either coated or made of a
3.1.1 Molds shall be constructed in the form of right circular
material that will prevent adherence to the concrete. At the
cylinders which stand with the cylindrical axis vertical and the
time of use, molds shall not l
...

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4.1 This practice provides for using an unbonded capping system in testing hardened concrete cylinders made in accordance with Practices C31/C31M or C192/C192M, or cores obtained in accordance with Test Method C42/C42M in lieu of the capping systems described in Practice C617/C617M.  
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ABSTRACT
This test method covers the determination of strength of cylindrical concrete specimens that have been molded in place using special molds attached to formwork. A concrete cylinder mold assembly consisting of a mold and a tubular support member is fastened within the concrete formwork prior to placement of the concrete. The elevation of the mold upper edge is adjusted to correspond to the plane of the finished slab surface. The mold support prevents direct contact of the slab concrete with the outside of the mold and permits its easy removal from the hardened concrete. Strength of cast-in-place cylinders may be used for various purposes, such as estimating the load-bearing capacity of slabs, determining the time of form and shore removal, and determining the effectiveness of curing and protection. Consolidation of concrete in the mold may be varied to simulate the conditions of placement. Internal vibration of concrete in the mold is prohibited except under special circumstances.
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4.1 Cast-in-place cylinder strength relates to the strength of concrete in the structure due to the similarity of curing conditions because the cylinder is cured within the slab. However, due to differences in moisture condition, degree of consolidation, specimen size, and length-diameter ratio, there is not a unique relationship between the strength of cast-in-place cylinders and cores of the same age. When cores can be drilled undamaged and tested in the same moisture condition as the cast-in-place cylinders, the strength of the cylinders can be expected to be on average 10 % higher than the cores at ages up to 91 days for specimens of the same size and length-diameter ratio.4  
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3.1 This practice describes procedures for providing plane surfaces on the ends of freshly molded concrete cylinders, hardened cylinders, or drilled concrete cores when the end surfaces do not conform with the planeness and perpendicularity requirements of applicable standards. Practice C1231/C1231M describes alternative procedures using unbonded caps or pad caps.
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SIGNIFICANCE AND USE
5.1 This test method provides a procedure to determine the passing ability of self-consolidating concrete. This test method is applicable for laboratory use in comparing the passing ability of different concrete mixtures. It is also applicable in the field as a quality control test.  
5.2 The difference between the slump flow and J-Ring flow is an indication of the passing ability of the concrete. A difference less than 25 mm [1 in.] indicates good passing ability and a difference greater than 50 mm [2 in.] indicates poor passing ability. The orientation of the mold for the J-Ring test and for the slump flow test without the J-Ring shall be the same.  
5.3 This test method is limited to self-consolidating concrete with nominal maximum size of aggregate of up to 25 mm [1 in.].
SCOPE
1.1 This test method covers determination of the passing ability of self-consolidating concrete (SCC) by using the J-Ring in combination with a mold.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
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ASTM C173/C173M-23(Test Method)
Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method

SIGNIFICANCE AND USE
4.1 This test method covers the determination of the air content of freshly mixed concrete. It measures the air contained in the mortar fraction of the concrete, but is not affected by air that may be present inside porous aggregate particles.  
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SCOPE
1.1 This test method covers determination of the air content of freshly mixed concrete containing any type of aggregate, whether it be dense, cellular, or lightweight.  
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Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete

ABSTRACT
This test method covers determination of the density of freshly mixed concrete and gives formulas for calculating the unit weight, yield or relative yield, cement content, and air content of the concrete. Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials. The test method shall use the following apparatuses: balance or scale; tamping rod, which is a round straight steel rod having the tamping end rounded to a hemispherical tip; internal vibrator which may have rigid of flexible shafts, preferably powered by electric motors; measure, which is a cylindrical container made of steel or other suitable metal specified herein; strike-off plate; mallet; and scoop of a size large enough so each amount of concrete obtained from the sampling receptacle is representative and small enough so it is not spilled during placement in the measure.
SCOPE
1.1 This test method covers determination of the density (see Note 1) of freshly mixed concrete and gives formulas for calculating the yield, cement content, and air content of the concrete. Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
Note 1: Unit weight was the previous terminology used to describe the property determined by this test method, which is mass per unit volume.  
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