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ASTM-C1231:2008 Edition

ASTM-C1231:2008 Edition

$40.63

C1231/C1231M-08a Standard Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Concrete Cylinders

Published By Publication Date Number of Pages
ASTM 2008 5
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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. ( Warning Concrete cylinders tested with unbonded caps rupture more violently than comparable cylinders tested with bonded caps. The safety precautions given in the Manual of Aggregate and Concrete Testing are recommended. )

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
Significance and Use
Materials and Apparatus
2 Test Specimens
Procedure
Qualification of Unbonded Capping Systems and Verification of Reuse of Pads
TABLE 1
3 FIG. 1
4 Calculation
Keywords
X1. SAMPLE REPORT AND CALCULATION
X1.1
X1.2
X1.3
X1.4

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