ASTM C1231/C1231M-00e1

Standard Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Concrete Cylinders

SCOPE
1.1 This practice covers requirements for a capping system using unbonded caps for testing concrete cylinders molded in accordance with Practice C 31/C 31M or C 192/C 192M. Unbonded neoprene caps of a defined hardness are permitted to be used for testing for a specified maximum number of reuses without qualification testing up to a certain concrete compressive strength level. Above that strength, level neoprene caps will require qualification testing. Qualification testing is required for all elastomeric materials other than neoprene regardless of the concrete strength.
1.2 Unbonded caps are not to be used for acceptance testing of concrete with compressive strength below 1500 psi [10 MPa] or above 12 000 psi [85 MPa].
1.3 The values stated in either inch-pound or SI units shall be regarded as standard. SI units are shown in brackets. That values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining the values in any way.
1.4 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. For a specific hazard statement, see Note 4.

General Information

• Status: Historical
• Publication Date: 07-Aug-2000
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.61 - Testing for Strength

Relations

• Replaced By: ASTM C1231/C1231M-06 - Standard Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Concrete Cylinders
• Effective Date: 15-Dec-2006
• Referred By: ASTM C780-23 - Standard Test Methods for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
• Effective Date: 08-Aug-2000
• Referred By: ASTM C1622/C1622M-10(2016)e1 - Standard Specification for Cold-Weather Admixture Systems
• Effective Date: 08-Aug-2000
• Referred By: ASTM C1768/C1768M-12(2017) - Standard Practice for Accelerated Curing of Concrete Cylinders
• Effective Date: 08-Aug-2000
• Referred By: ASTM C497-20e1 - Standard Test Methods for Concrete Pipe, Concrete Box Sections, Manhole Sections, or Tile
• Effective Date: 08-Aug-2000
• Referred By: ASTM D4832/D4832M-23 - Standard Test Method for Preparation and Testing of Controlled Low Strength Material (CLSM) Cylindrical Test Specimens
• Effective Date: 08-Aug-2000
• Referred By: ASTM C1604/C1604M-05(2019) - Standard Test Method for Obtaining and Testing Drilled Cores of Shotcrete
• Effective Date: 08-Aug-2000
• Referred By: ASTM C918/C918M-20 - Standard Test Method for Measuring Early-Age Compressive Strength and Projecting Later-Age Strength
• Effective Date: 08-Aug-2000
• Referred By: ASTM C873/C873M-15 - Standard Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds
• Effective Date: 08-Aug-2000
• Referred By: ASTM C42/C42M-20 - Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete
• Effective Date: 08-Aug-2000
• Referred By: ASTM C617/C617M-15 - Standard Practice for Capping Cylindrical Concrete Specimens
• Effective Date: 08-Aug-2000
• Referred By: ASTM C497M-20a - Standard Test Methods for Concrete Pipe, Concrete Box Sections, Manhole Sections, or Tile (Metric)
• Effective Date: 08-Aug-2000
• Referred By: ASTM C1077-17 - Standard Practice for Agencies Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Testing Agency Evaluation
• Effective Date: 08-Aug-2000
• Referred By: ASTM C39/C39M-21 - Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
• Effective Date: 08-Aug-2000

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
e1
Designation:C1231/C1231M–00
Standard Practice for
Use of Unbonded Caps in Determination of Compressive
1
Strength of Hardened Concrete Cylinders
This standard is issued under the fixed designation C1231/C1231M; 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.
1
e NOTE—Equations in 9.2, 9.3, and X1.3 were editorially corrected August 2000.
1. Scope C617 Practice for Capping Cylindrical Concrete Speci-
2
mens
1.1 This practice covers requirements for a capping system
D2000 Classification System for Rubber products inAuto-
using unbonded caps for testing concrete cylinders molded in
3
motive Applications
accordance with Practice C31/C31M or C192/C192M. Un-
D 2240 Test Method for Rubber Property—Durometer
bonded neoprene caps of a defined hardness are permitted to
4
Hardness
be used for testing for a specified maximum number of reuses
without qualification testing up to a certain concrete compres-
3. Terminology
sive strength level. Above that strength, level neoprene caps
3.1 Definitions of Terms Specific to This Standard:
will require qualification testing. Qualification testing is re-
3.1.1 pad, n—an unbonded elastomeric pad.
quired for all elastomeric materials other than neoprene
3.1.2 unbonded cap, n—a metal retainer and an elastomeric
regardless of the concrete strength.
pad.
1.2 Unbonded caps are not to be used for acceptance testing
of concrete with compressive strength below 1500 psi [10
4. Significance and Use
MPa] or above 12 000 psi [85 MPa].
4.1 This practice provides for using an unbonded capping
1.3 The values stated in either inch-pound or SI units shall
system in testing hardened concrete cylinders made in accor-
be regarded as standard. SI units are shown in brackets. That
dance with Practices C31/C31M or C192/C192M in lieu of
values stated in each system may not be exact equivalents;
the capping systems described in Practice C617.
therefore,eachsystemmustbeusedindependentlyoftheother,
4.2 The elastomeric pads deform in initial loading to con-
without combining the values in any way.
form to the contour of the ends of the cylinder and are
1.4 This standard does not purport to address all of the
restrained from excessive lateral spreading by plates and metal
safety concerns, if any, associated with its use. It is the
ringstoprovideauniformdistributionofloadfromthebearing
responsibility of the user of this standard to establish appro-
blocks of the testing machine to the ends of the concrete or
priate safety and health practices and determine the applica-
mortar cylinders.
bility of regulatory limitations prior to use. For a specific
hazard statement, see Note 4.
5. Materials and Apparatus
5.1 Materials and equipment necessary to produce ends of
2. Referenced Documents
the reference cylinders that conform to planeness requirements
2.1 ASTM Standards:
of Test Method C39 and the requirements of Practice C617.
C31/C31M Practice for Making and Curing Concrete Test
This may include grinding equipment or capping materials and
2
Specimens in the Field
equipmenttoproduceneatcementpaste,highstrengthgypsum
C39 Test Method for Compressive Strength of Cylindrical
2 plaster, or sulfur mortar caps.
Concrete Specimens
5.2 Elastomeric Pads:
C192/C192M Practice for Making and Curing Concrete
1 1
2 5.2.1 Pads shall be ⁄2 6 ⁄16 in. [136 2 mm] thick and the
Test Specimens in the Laboratory
1
diametershallnotbemorethan ⁄16in.[2mm]smallerthanthe
inside diameter of the retaining ring.
5.2.2 Pads shall be made from polychloroprene (neoprene)
1
This practice is under the jurisdiction of ASTM Committee C09 on Concrete meeting the requirements of Classification D2000 as follows:
andConcreteAggregatesandisthedirectresponsibilityofSubcommitteeC09.61on
Testing Concrete for Strength.
Current edition approved Jan. 10, 2000. Published April 2000. Originally
3
published as C1231–93. Last previous edition C1231–99. Annual Book of ASTM Standards, Vol 09.02.
2 4
Annual Book of ASTM Standards, Vol 04.02. Annual Book of ASTM Standards, Vol 09.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C1231/C1231M
Shore A Classification D 2000
Durometer Line Call-Out
50 M2BC514
60 M2BC614
70 M2BC714
The tolerance on ShoreAdurometer hardness is 6 5. Table
1 provides requirements for use of caps made from material
meeting the requirements of Classification D2000, above.
5.2.3 Otherelastomericmaterialsthatmeettheperformance
requirements of qualification tests in Section 8 are permitted.
5.2.4 Elastomeric pads shall be s
...