ASTM C802-09a

Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction Materials

SIGNIFICANCE AND USE
Certain criteria need to be met before undertaking an interlaboratory study to determine the precision of a test method. It is not necessary that all of the following conditions described be completely fulfilled in every case; however, if some conditions are not met or are met incompletely, the program will become more complicated and require more work and expense, or may result in impaired information. The recommendations outlined in this section are intended to ensure that the test method is free of technical difficulties to the greatest extent possible before an expensive and time-consuming interlaboratory study is undertaken.
The first requirement is the existence of a valid and well-written test method that has been developed in one competent laboratory (or by cooperative work in a small number of laboratories), and has been subjected to a screening procedure, or to ruggedness testing as described in Practice C1067. As a result of the screening procedure and some experience with the test method in the sponsoring laboratory and one or two others, a written version of the test method has been developed (but not necessarily published as a standard method) that describes the test procedure in terms that can easily be followed in any properly equipped laboratory. Conditions that affect the test results should be identified and the proper degree of control of those conditions should be specified in the description of the test procedure (see Note 1).
Note 1—The desired degree of control of conditions that affect test results may not always be practically achievable, and tolerances in the test method should recognize this fact. Variations in test results due to variations in such conditions contribute to the total variation which determines the precision of the test method. If the resulting variation is so great that uncertainties in average values obtained by the test method are unacceptably high, then the test method itself is at fault, and efforts should be mad...
SCOPE
1.1 This practice describes techniques for planning, conducting, and analyzing the results of an interlaboratory study of a test method. It is designed to be used in conjunction with Practice C670. Thus, the procedures recommended in this practice have the limited purpose of providing reliable information on which precision statements of the type described in Practice C670 can be based. It is not appropriate for use in programs whose purpose is to develop a test method or to assess the relative merits of two or more test methods.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

General Information

• Status: Historical
• Publication Date: 14-Dec-2009
• ICS: 91.100.01 - Construction materials in general
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.94 - Evaluation of Data (Joint C09 and C01)

Relations

• Replaces: ASTM C802-09 - Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction Materials
• Effective Date: 15-Dec-2009
• 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: 15-Dec-2009
• Referred By: ASTM C1067-20 - Standard Practice for Conducting a Ruggedness Evaluation or Screening Program for Test Methods for Construction Materials
• Effective Date: 15-Dec-2009
• Referred By: ASTM C403/C403M-23 - Standard Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance
• Effective Date: 15-Dec-2009
• Referred By: ASTM D6607-21 - Standard Practice for Inclusion of Precision Statement Variation in Specification Limits
• Effective Date: 15-Dec-2009
• Referred By: ASTM D653-22 - Standard Terminology Relating to Soil, Rock, and Contained Fluids
• Effective Date: 15-Dec-2009
• Referred By: ASTM C670-15 - Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
• Effective Date: 15-Dec-2009
• Referred By: ASTM C796/C796M-19 - Standard Test Method for Foaming Agents for Use in Producing Cellular Concrete Using Preformed Foam
• Effective Date: 15-Dec-2009
• Referred By: ASTM C1202-22e1 - Standard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride Ion Penetration
• Effective Date: 15-Dec-2009
• Referred By: ASTM D6648-08(2016) - Standard Test Method for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)
• Effective Date: 15-Dec-2009

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: C802 − 09a
StandardPractice for
Conducting an Interlaboratory Test Program to Determine
1
the Precision of Test Methods for Construction Materials
This standard is issued under the fixed designation C802; 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.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 3. Significance and Use
3.1 Certain criteria need to be met before undertaking an
1.1 This practice describes techniques for planning,
interlaboratory study to determine the precision of a test
conducting, and analyzing the results of an interlaboratory
method. It is not necessary that all of the following conditions
study of a test method. It is designed to be used in conjunction
withPracticeC670.Thus,theproceduresrecommendedinthis described be completely fulfilled in every case; however, if
some conditions are not met or are met incompletely, the
practice have the limited purpose of providing reliable infor-
mation on which precision statements of the type described in programwillbecomemorecomplicatedandrequiremorework
and expense, or may result in impaired information. The
Practice C670 can be based. It is not appropriate for use in
programs whose purpose is to develop a test method or to recommendations outlined in this section are intended to
ensurethatthetestmethodisfreeoftechnicaldifficultiestothe
assess the relative merits of two or more test methods.
greatest extent possible before an expensive and time-
1.2 The values stated in inch-pound units are to be regarded
consuming interlaboratory study is undertaken.
as standard. The values given in parentheses are mathematical
3.1.1 The first requirement is the existence of a valid and
conversions to SI units that are provided for information only
well-written test method that has been developed in one
and are not considered standard.
competent laboratory (or by cooperative work in a small
number of laboratories), and has been subjected to a screening
2. Referenced Documents
procedure, or to ruggedness testing as described in Practice
2
2.1 ASTM Standards: C1067. As a result of the screening procedure and some
C109/C109MTest Method for Compressive Strength of
experience with the test method in the sponsoring laboratory
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube and one or two others, a written version of the test method has
Specimens) been developed (but not necessarily published as a standard
C136Test Method for Sieve Analysis of Fine and Coarse method) that describes the test procedure in terms that can
Aggregates easily be followed in any properly equipped laboratory. Con-
C670Practice for Preparing Precision and Bias Statements ditions that affect the test results should be identified and the
for Test Methods for Construction Materials properdegreeofcontrolofthoseconditionsshouldbespecified
C1067Practice for Conducting a Ruggedness Evaluation or in the description of the test procedure (see Note 1).
Screening Program for Test Methods for Construction
NOTE 1—The desired degree of control of conditions that affect test
Materials
resultsmaynotalwaysbepracticallyachievable,andtolerancesinthetest
E105Practice for Probability Sampling of Materials
method should recognize this fact. Variations in test results due to
E177Practice for Use of the Terms Precision and Bias in variations in such conditions contribute to the total variation which
determines the precision of the test method. If the resulting variation is so
ASTM Test Methods
great that uncertainties in average values obtained by the test method are
E178Practice for Dealing With Outlying Observations
unacceptablyhigh,thenthetestmethoditselfisatfault,andeffortsshould
be made to improve it or to replace it by a better one. An expensive and
time-consuming interlaboratory study should not be undertaken on such a
test method.
1
This practice is under the jurisdiction of ASTM Committee C09 on Concrete
andConcreteAggregates.ThispracticewasdevelopedjointlybyASTMCommittee
3.1.2 Any apparatus required for performing the test should
C01, C09, D04, and D18, and is endorsed by all four committees.
be appropriately designed and available at reasonable cost.
Current edition approved Dec. 15, 2009. Published February 2010. Originally
3.1.3 Personnel in participating laboratories should have
approved in 1974. Last previous edition approved in 2009 as C802–09. DOI:
10.1520/C0802-09A.
enough experience with the test method so that they are
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
competent to run the test. The importance of this requirement
contact ASTM Customer Service at [e-mail]. For Annual B
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C802–09 Designation:C802–09a
Standard Practice for
Conducting an Interlaboratory Test Program to Determine
1
the Precision of Test Methods for Construction Materials
This standard is issued under the fixed designation C802; 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.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice describes techniques for planning, conducting, and analyzing the results of an interlaboratory study of a test
method. It is designed to be used in conjunction with Practice C670. Thus, the procedures recommended in this practice have the
limited purpose of providing reliable information on which precision statements of the type described in Practice C670 can be
based. It is not appropriate for use in programs whose purpose is to develop a test method or to assess the relative merits of two
or more test methods.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C1067 Practice for Conducting A Ruggedness or Screening Program for Test Methods for Construction Materials
E105 Practice for Probability Sampling Of Materials
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E178 Practice for Dealing With Outlying Observations
3. Significance and Use
3.1 Certain criteria need to be met before undertaking an interlaboratory study to determine the precision of a test method. It
is not necessary that all of the following conditions described be completely fulfilled in every case; however, if some conditions
arenotmetoraremetincompletely,theprogramwillbecomemorecomplicatedandrequiremoreworkandexpense,ormayresult
in impaired information. The recommendations outlined in this section are intended to ensure that the test method is free of
technical difficulties to the greatest extent possible before an expensive and time-consuming interlaboratory study is undertaken.
3.1.1 The first requirement is the existence of a valid and well-written test method that has been developed in one competent
laboratory (or by cooperative work in a small number of laboratories), and has been subjected to a screening procedure, or to
ruggednesstestingasdescribedinPracticeC1067.Asaresultofthescreeningprocedureandsomeexperiencewiththetestmethod
in the sponsoring laboratory and one or two others, a written version of the test method has been developed (but not necessarily
published as a standard method) that describes the test procedure in terms that can easily be followed in any properly equipped
laboratory. Conditions that affect the test results should be identified and the proper degree of control of those conditions should
be specified in the description of the test procedure (see Note 1).
NOTE 1—Thedesireddegreeofcontrolofconditionsthataffecttestresultsmaynotalwaysbepracticallyachievable,andtolerancesinthetestmethod
should recognize this fact. Variations in test results due to variations in such conditions contribute to the total variation which determines the precision
of the test method. If the resulting variation is so great that uncertainties in average values obtained by the test method are unacceptably high, then the
test method itself is at fault, and efforts should be made to improve it or to replace it by a better one.An expensive and time-consuming interlaboratory
study should not be undertaken on such a test method.
1
This practice is under the jurisdiction ofASTM Committee C09 on Concrete and ConcreteAggregates .This practice was developed jointly byASTM Committee C01,
C09, D04, and D18, and is endorsed by all four committees.
´1
Current edition approved Nov. 1, 2009. Published December 2009. Originally approved in 1974. Last previous edition approved in 2008 as C802–96(2008) . DOI:
10.1520/C0802-09.
Current edition approved Dec. 15, 2009. Published February 2010. Originally approved in 1974. Last previous edition approved in 2009 as C
...