ASTM C1093-23

Standard Practice for Accreditation of Testing Agencies for Masonry

SIGNIFICANCE AND USE
4.1 This practice provides the basic minimum criteria for use in evaluating the qualifications of testing agencies for masonry materials. The criteria may be supplemented by more specific criteria and requirements. It can be used as a guide for internal audits by individual users.  
4.2 The intent of this practice is to provide a consensus basis for evaluating a testing agency, with respect to that agency's capability to objectively and competently provide the specific services needed by the user.  
4.3 This practice may be used as a basis for accreditation.
SCOPE
1.1 This practice covers the minimum requirements for laboratory personnel, for establishing and maintaining a quality system, and it establishes minimum qualifications for agencies engaged in the testing of masonry materials.  
1.2 Criteria are provided for evaluating the capability of an agency to properly perform designated tests on masonry materials, and for establishing guidelines pertaining to an agency's organization, personnel, facilities, and quality system. This practice may be supplemented by more specific criteria and requirements for particular projects.  
1.3 This practice can be used as a basis to evaluate testing agencies, and it is intended for use for the qualifying or accrediting of testing agencies, or both, public or private, engaged in the testing of masonry materials.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-May-2023
• ICS: 03.120.20 - Product and company certification. Conformity assessment
• Technical Committee: C15 - Masonry – Manufactured Masonry Units, Mortars and Grouts
• Drafting Committee: C15.07 - Standards for Laboratory Accreditation

Relations

• Refers: ASTM C173/C173M-24 - Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
• Effective Date: 01-Jan-2024
• Refers: ASTM C231/C231M-24 - Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
• Effective Date: 01-Jan-2024
• Refers: ASTM C1232-23 - Standard Terminology for Masonry
• Effective Date: 15-Dec-2023
• Refers: ASTM C109/C109M-23 - Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 50 mm [2 in.] Cube Specimens)
• Effective Date: 15-Dec-2023
• Refers: ASTM C140/C140M-23a - Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
• Effective Date: 01-Dec-2023
• Refers: ASTM C1716/C1716M-23 - Standard Specification for Compression Testing Machine Requirements for Concrete Masonry Units, Related Units, and Prisms
• Effective Date: 01-Dec-2023
• Refers: ASTM C1314-23b - Standard Test Method for Compressive Strength of Masonry Prisms
• Effective Date: 01-Dec-2023
• Refers: ASTM C117-23 - Standard Test Method for Materials Finer than 75-μm (No. 200) Sieve in Mineral Aggregates by Washing
• Effective Date: 15-Nov-2023
• Refers: ASTM C173/C173M-23 - Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
• Effective Date: 01-Sep-2023
• Refers: ASTM C305-20 - Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
• Effective Date: 15-Jul-2020
• Refers: ASTM C185-20 - Standard Test Method for Air Content of Hydraulic Cement Mortar
• Effective Date: 01-Apr-2020
• Refers: ASTM C185-19 - Standard Test Method for Air Content of Hydraulic Cement Mortar
• Effective Date: 01-Dec-2019
• Refers: ASTM C67/C67M-19 - Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile
• Effective Date: 01-Jul-2019
• Refers: ASTM C270-19ae1 - Standard Specification for Mortar for Unit Masonry
• Effective Date: 01-May-2019
• Refers: ASTM C270-19a - Standard Specification for Mortar for Unit Masonry
• Effective Date: 01-May-2019

Overview

ASTM C1093-23: Standard Practice for Accreditation of Testing Agencies for Masonry provides a comprehensive framework for evaluating and accrediting laboratories and agencies conducting masonry material testing. Developed by ASTM International, this standard specifies the minimum requirements in terms of personnel qualifications, quality systems, documentation, and technical capability to ensure objective, accurate, and reliable testing services for masonry materials.

This practice is widely adopted as a consensus reference for both public and private organizations seeking to evaluate, qualify, or accredit masonry testing agencies. Its guidelines support internal audits, drive continuous improvement, and promote trust among construction stakeholders relying on accurate test results for masonry products.

Key Topics

• Minimum Personnel Qualifications

  • Defines experience, education, and certification requirements for technical staff, supervisors, and quality managers.
  • Specifies necessary training, competency evaluation, and documentation standards.

• Quality System and Quality System Manual (QSM)

  • Requires a documented and maintained quality system manual outlining organizational structure, staff qualifications, equipment inventory, and reporting methods.
  • Establishes guidelines for internal reviews, traceability, corrective actions, and records retention.

• Equipment Calibration and Verification

  • Details the intervals and procedures for calibration and verification of critical laboratory equipment, such as balances, compression machines, ovens, and sieves.
  • Mandates retention of calibration records and traceability for all apparatus used in masonry testing.

• Test Methods and Procedures

  • Agencies must demonstrate proficiency in standard test methods for masonry units, mortars, aggregates, and other materials.
  • Addresses the use of both ASTM standard procedures and documented in-house methods where applicable.

• Accreditation and Proficiency Testing

  • Participation in proficiency sample programs and regular agency accreditation by a national or recognized authority is required.
  • On-site evaluations and audits must be performed at regular intervals to ensure ongoing compliance.

Applications

ASTM C1093-23 is an essential tool for:

• Laboratory Accreditation Bodies:
  Used as a primary benchmark for accrediting agencies involved in masonry material testing.

• Construction Project Owners and Engineers:
  Ensures that testing laboratories engaged in a project meet strict standards for reliability, competence, and data integrity.

• Testing Laboratories:
  Guides internal audits, quality system review, technician certification, and continuous improvement processes.

• Regulatory and Government Agencies:
  Facilitates standardized approaches to qualifying public and private construction testing services.

• Specification Writers and Auditors:
  Provides a framework for the technical evaluation of laboratory capabilities and compliance with industry best practices.

By following ASTM C1093-23, organizations can have confidence in the quality and consistency of masonry material testing, supporting code compliance, project specifications, and structural safety.

Related Standards

Several ASTM standards are referenced within ASTM C1093-23, enhancing its scope and utility, including:

• ASTM C67/C67M: Methods for Sampling and Testing Brick and Clay Tile
• ASTM C109/C109M: Compressive Strength of Hydraulic Cement Mortars
• ASTM C140/C140M: Sampling and Testing Concrete Masonry Units
• ASTM C143/C143M: Slump of Hydraulic-Cement Concrete
• ASTM C780: Evaluation of Mortars for Masonry
• ASTM C1019: Sampling and Testing Grout for Masonry
• ASTM C1314: Compressive Strength of Masonry Prisms

These and other referenced standards ensure comprehensive coverage and promote the highest quality testing protocols throughout the masonry industry.

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Keywords: masonry materials, laboratory accreditation, quality system, personnel qualifications, equipment calibration, ASTM standards, masonry testing agencies, construction material testing, quality control, certification, internal audit, accreditation process.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1093 − 23
Standard Practice for
Accreditation of Testing Agencies for Masonry
This standard is issued under the fixed designation C1093; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube
Specimens)
1.1 This practice covers the minimum requirements for
C117 Test Method for Materials Finer than 75-μm (No. 200)
laboratory personnel, for establishing and maintaining a quality
Sieve in Mineral Aggregates by Washing
system, and it establishes minimum qualifications for agencies
C136/C136M Test Method for Sieve Analysis of Fine and
engaged in the testing of masonry materials.
Coarse Aggregates
1.2 Criteria are provided for evaluating the capability of an
C140/C140M Test Methods for Sampling and Testing Con-
agency to properly perform designated tests on masonry
crete Masonry Units and Related Units
materials, and for establishing guidelines pertaining to an
C143/C143M Test Method for Slump of Hydraulic-Cement
agency’s organization, personnel, facilities, and quality system.
Concrete
This practice may be supplemented by more specific criteria
C173/C173M Test Method for Air Content of Freshly Mixed
and requirements for particular projects.
Concrete by the Volumetric Method
1.3 This practice can be used as a basis to evaluate testing
C185 Test Method for Air Content of Hydraulic Cement
agencies, and it is intended for use for the qualifying or
Mortar
accrediting of testing agencies, or both, public or private,
C230/C230M Specification for Flow Table for Use in Tests
engaged in the testing of masonry materials.
of Hydraulic Cement
1.4 This standard does not purport to address all of the
C231/C231M Test Method for Air Content of Freshly Mixed
safety concerns, if any, associated with its use. It is the
Concrete by the Pressure Method
responsibility of the user of this standard to establish appro-
C270 Specification for Mortar for Unit Masonry
priate safety, health, and environmental practices and deter-
C305 Practice for Mechanical Mixing of Hydraulic Cement
mine the applicability of regulatory limitations prior to use.
Pastes and Mortars of Plastic Consistency
1.5 This international standard was developed in accor-
C470/C470M Specification for Molds for Forming Concrete
dance with internationally recognized principles on standard-
Test Cylinders Vertically
ization established in the Decision on Principles for the
C780 Test Method for Preconstruction and Construction
Development of International Standards, Guides and Recom-
Evaluation of Mortars for Plain and Reinforced Unit
mendations issued by the World Trade Organization Technical
Masonry
Barriers to Trade (TBT) Committee.
C1019 Test Method for Sampling and Testing Grout for
Masonry
2. Referenced Documents
C1072 Test Methods for Measurement of Masonry Flexural
2.1 ASTM Standards:
Bond Strength
C67/C67M Test Methods for Sampling and Testing Brick
C1232 Terminology for Masonry
and Structural Clay Tile
C1314 Test Method for Compressive Strength of Masonry
C109/C109M Test Method for Compressive Strength of
Prisms
C1506 Test Method for Water Retention of Hydraulic
Cement-Based Mortars and Plasters
This practice is under the jurisdiction of ASTM Committee C15 on Manufac-
tured Masonry Units and is the direct responsibility of Subcommittee C15.07 on
C1552 Practice for Capping Concrete Masonry Units, Re-
Standards for Laboratory Accreditation.
lated Units and Masonry Prisms for Compression Testing
Current edition approved June 1, 2023. Published June 2023. Originally
C1716/C1716M Specification for Compression Testing Ma-
approved in 1988. Last previous edition approved in 2022 as C1093 – 22a. DOI:
10.1520/C1093-23. chine Requirements for Concrete Masonry Units, Related
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Units, and Prisms
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
E4 Practices for Force Calibration and Verification of Test-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ing Machines
*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
C1093 − 23
testing should be that necessary to accomplish construction control for the
E11 Specification for Woven Wire Test Sieve Cloth and Test
user’s specific project or special requirements.
Sieves
7. Personnel Qualifications
3. Terminology
7.1 Management and Supervision—All relevant testing ser-
3.1 Definitions:
vices shall be provided under the Full-Time technical direction
3.1.1 quality system—the organizational structure,
of a registered professional Engineer, with at least five years of
responsibilities, procedures, processes, capabilities, and re-
experience in inspecting and testing masonry materials or a
sources for implementing quality management.
person of equivalent science-oriented education and experi-
3.2 Definitions of Terms Specific to This Standard:
ence.
3.2.1 agency—the organization engaged to test masonry
7.2 Supervising Technician—The supervising technician(s)
materials as required by a specification or contract.
shall have at least five years experience performing tests on
3.2.2 quality system manual (QSM)—a manual describing
materials, with at least two years testing masonry materials.
and documenting an agency’s quality system.
7.2.1 Personnel supervising laboratory testing shall have
3.2.3 user—the person or organization engaging the agency
current certification(s). The certification(s) shall conform to the
to provide tests; or using this practice to evaluate or accredit
requirements in 7.4. Certification is not required for test
the agency.
methods listed in 7.2.1.1 that are outside of the scope of the
testing agency.
3.3 For additional terms used in this standard, refer to
7.2.1.1 The certification(s) shall include a written examina-
Terminology C1232.
tion and performance examination for the following standards:
Test Methods C140/C140M, C780, C1019, and Practice
4. Significance and Use
C1552. Certification(s) for laboratory testing shall include a
4.1 This practice provides the basic minimum criteria for
written examination for the following standards: Specification
use in evaluating the qualifications of testing agencies for
C270 and Test Method C1314.
masonry materials. The criteria may be supplemented by more
7.2.2 Personnel supervising field testing shall have current
specific criteria and requirements. It can be used as a guide for
certification(s). The certification(s) shall conform to the re-
internal audits by individual users.
quirements in 7.4. Certification is not required for test methods
4.2 The intent of this practice is to provide a consensus basis
listed in 7.2.2.1 that are outside of the scope of the testing
for evaluating a testing agency, with respect to that agency’s
agency.
capability to objectively and competently provide the specific
7.2.2.1 The certification(s) shall include a written examina-
services needed by the user.
tion and performance examination for the following standards:
Test Methods C140/C140M, C780, and C1019. The certifica-
4.3 This practice may be used as a basis for accreditation.
tion shall include a written examination for the following
5. Responsibilities and Duties standard: Test Method C1314.
5.1 The agency shall ensure that only tests for which it is 7.3 Technicians—Personnel performing laboratory and field
adequately equipped and staffed are performed. testing shall possess current certifications that include each
standard identified in 7.3.1 and 7.3.2, and shall conform to 7.4.
5.2 The agency shall ensure that personnel perform only
Certification is not required for test methods listed in 7.3.1 and
tests for which they are adequately trained, qualified, and
7.3.2 that are outside of the scope of the testing agency.
certified in accordance with applicable specifications.
7.3.1 Certification(s) for laboratory testing shall include a
5.3 The agency shall ensure that all equipment is properly
written examination and performance examination for the
maintained in good operating condition and is calibrated or
following standards: Test Methods C140/C140M, C780,
verified as applicable.
C1019, and Practice C1552. Certification(s) for laboratory
testing shall include a written examination for the following
5.4 The agency shall perform all testing in accordance with
standards: Specification C270 and Test Method C1314.
appropriate standards and quality control criteria. Documents
7.3.2 Certification(s) for field testing shall include a written
unique to the user shall be furnished to the agency.
examination and performance examination for the following
6. General Capabilities
standards: Test Methods C140/C140M, C780, and C1019.
Certification(s) for field testing shall include a written exami-
6.1 Laboratory Testing—The laboratory testing services of
nation for the following standard: Test Method C1314.
the masonry materials testing agency shall include some or all
of the following capabilities:
7.4 The technician certification program shall meet the
6.1.1 Testing of masonry units in the laboratory,
following criteria:
6.1.2 Testing of masonry mortars in the laboratory, and
7.4.1 The written examination shall cover the test method or
6.1.3 Testing of aggregates for compliance with specifica-
practice, including, as applicable: the significance of the test or
tion requirements.
practice, sampling and specimen preparation procedures,
calculations, and reporting of results,
NOTE 1—Since the requirements for construction control can vary from
7.4.2 The performance examination shall include a demon-
project to project depending upon the nature of the type, location, and
intended use of the masonry in the project, the capability of the agency for stration of the test method or practice, to document the
C1093 − 23
technician’s ability to correctly perform the procedure in 8.5.1 Calibration and Verification Records—The agency
accordance with the standard, and shall maintain calibration and verification records for all
7.4.3 The written and performance examinations shall in- equipment specified in the QSM. Such records shall include:
clude all relevant test methods that are listed in the section 8.5.1.1 Description of the equipment calibrated or verified,
above for the type of technician being certified. including identification of the specific piece of equipment
7.4.4 The period of certification shall not exceed five years. using the equipment serial number or other unique identifying
7.4.5 The period for which the certification is valid shall be designator provided by the agency (see Note 7),
clearly and prominently stated on any documents that attest to 8.5.1.2 Date the work was done,
the certification(s) held by the individual. 8.5.1.3 Identification of individual performing work,
8.5.1.4 Identification of calibration or verification procedure
7.5 It is satisfactory for a person to fill one or more positions
used,
in an agency providing that person is qualified for each
8.5.1.5 The next calibration or verification due date,
position.
8.5.1.6 Identification of any calibration or verification de-
NOTE 2—Established certification programs exist for Test Methods
vice used, and
C140/C140M, C780, C1019, and Practice C1552 which include a written
8.5.1.7 Specific criteria required for each piece of equip-
examination for Specifications C270 and Test Method C1314. These
ment listed in 8.5.2.
should be used when applicable.
8.5.2 Masonry Test Equipment:
8. Quality System Criteria
8.5.2.1 Balances and Weights—Calibrate balances and
weights at intervals not exceeding 12 months. Record shall
8.1 The agency shall establish and implement a quality
include test points and corresponding percentage of error.
system that meets the criteria in subsections 8.2 to 8.14.
8.5.2.2 Cube Molds and Tampers—Verify cube molds and
8.2 Quality System Manual (QSM)—The agency shall es-
tampers for conformance to the design and dimensional re-
tablish and maintain a QSM that conforms to the requirements
quirements of Test Method C109/C109M. Verification for cube
in Section 9. Each document in the QSM shall indicate its
molds shall be performed at intervals not exceeding 30 months
preparation date. If a document is revised, the date of revision
and verification for tampers shall be performed at intervals not
shall be indicated on the document. The QSM shall be
exceeding 6 months.
available for use by laboratory staff.
8.5.2.3 Compression Test Machine—Compression test ma-
8.3 Quality System Management—The agency shall desig-
chine shall conform to the applicable requirements of the test
nate a person(s) having responsibility for the quality system
method being performed. The machine shall have a capacity,
and its implementation. The quality manager ensures that
loading range, and the appropriate heads and bearing plates for
activities are being conducted by agency staff in the manner
the specimens tested. Calibrate compression testing machines
specified in the agency’s quality system manual and has
in accordance with Practices E4. Record shall include test
responsibility for maintaining and revising it. This individu-
points and corresponding percentage of error. Calibration shall
al(s) shall have direct access to top management (see Note 3).
be performed at intervals not exceeding 12 months.
NOTE 3—This individual(s) may have other responsibilities (for
NOTE 5—There are several test methods that contain compression
example, laboratory manager).
machine requirements for testing of masonry products, including Test
Methods C67/C67M, C109/C109M, C140/C140M, C1314, and Specifi-
8.4 Laboratory Procedure Manual—A written laboratory
cation C1716/C1716M. The relevant standard for the test being performed
procedure manual outlining the method or inspection proce-
should be consulted for specific compression machine requirements.
dure for each test or service performed by the laboratory.
8.5.2.4 Flexural Bond Apparatus—Flexural bond apparatus
NOTE 4—Inspection and testing procedures may reference published
shall conform to the applicable requirements of Test Method
standards.
C1072. Calibrate the load measuring apparatus in accordance
8.5 Equipment—The agency shall calibrate or verify all with Practices E4. Record shall include test points and corre-
significant testing equipment associated with tests covered by sponding percentage of error. Calibration shall be performed at
the scope of this standard which the agency performs. As a intervals not exceeding 12 months.
minimum, the equipment listed in 8.5.2 shall be included if it 8.5.2.5 Mechanical Shakers—Verify the period of mechani-
is associated with tests performed by the agency. Applicable cal agitation of mechanical shakers for adequacy of sieving as
equipment shall be calibrated or verified at the intervals described in Test Method C136/C136M. Record shall include
specified in the agency’s QSM. The intervals specified in the length of time for the proper efficiency of sieving. Verification
QSM shall be no greater than those indicated in 8.5.2 (see Note shall be performed at intervals not exceeding 12 months.
6). Newly acquired equipment without manufacturer’s certifi- 8.5.2.6 Mixers (for Specification C270)—Inspect and verify
cation and equipment that has not been calibrated or verified mixers for conformance to the requirements of Practice C305.
because it has been removed from service shall be calibrated or Verification shall be performed at intervals not exceeding 30
verified before being placed in service. The agency shall have months.
detailed written procedures for all in-house calibration and 8.5.2.7 Cylindrical Molds—Cylindrical molds shall comply
verification activities not addressed in standards. These proce- with the requirements of Specification C470/C470M. Record
dures shall indicate the equipment required to perform the shall include dimensions and results of water-tightness test.
calibration or verification. In addition to standard test method Verification shall be performed at intervals not exceeding 12
requirements, the conditions listed in 8.5.2 shall be met. months.
C1093 − 23
8.5.2.8 Ovens—Verify oven settings with a verified refer- calibration vessel used; and the reading of the meter at the
ence temperature measuring device. Record shall include oven calibration test point(s). Calibration shall be performed at
settings, temperature reading at each oven setting, and adjust- intervals not exceeding 3 months.
ments if necessary. Verification shall be performed at intervals 8.5.2.18 Volumetric Air Meter—Verify volumetric air meter
not exceeding twelve months. using the procedure found in Test Method C173/C173M.
8.5.2.9 Sieve Accuracy—Verify sieve accuracy at least an- Record shall include dimensions and volume of meter and
calibration cup. Verification shall be performed at intervals not
nually on each sieve used for sieve analysis (Test Methods
C117 and C136/C136M). Use any of the following methods of exceeding 12 months.
8.5.2.19 Measuring Devices—Devices used to measure di-
verification:
mensions shall be verified to be accurate and readable to the
Method (1) Verification of each sieve in accordance with the
precision required by the test methods where they are used.
procedures prescribed in the Annex of Specification E11.
Verification record shall include test points used during
Method (2) A comparison of the results of a split sample
verification, and readings at test points. Verification shall be
sieved on different sieve sets. Results shall be verified that a
performed at intervals not exceeding 12 months.
single operator precision is within the acceptable range of two
results stated in the test method.
NOTE 6—When a maximum calibration or verification interval for a
Method (3) Participation in a sieve
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: C1093 − 22a C1093 − 23
Standard Practice for
Accreditation of Testing Agencies for Masonry
This standard is issued under the fixed designation C1093; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice covers the minimum requirements for laboratory personnel, for establishing and maintaining a quality system,
and it establishes minimum qualifications for agencies engaged in the testing of masonry materials.
1.2 Criteria are provided for evaluating the capability of an agency to properly perform designated tests on masonry materials, and
for establishing guidelines pertaining to an agency’s organization, personnel, facilities, and quality system. This practice may be
supplemented by more specific criteria and requirements for particular projects.
1.3 This practice can be used as a basis to evaluate testing agencies, and it is intended for use for the qualifying or accrediting
of testing agencies, or both, public or private, engaged in the testing of masonry materials.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
C67/C67M Test Methods for Sampling and Testing Brick and Structural Clay Tile
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens)
C117 Test Method for Materials Finer than 75-μm (No. 200) Sieve in Mineral Aggregates by Washing
C136/C136M Test Method for Sieve Analysis of Fine and Coarse Aggregates
C140/C140M Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C143/C143M Test Method for Slump of Hydraulic-Cement Concrete
C173/C173M Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
C185 Test Method for Air Content of Hydraulic Cement Mortar
C230/C230M Specification for Flow Table for Use in Tests of Hydraulic Cement
C231/C231M Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
C270 Specification for Mortar for Unit Masonry
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
This practice is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.07 on Standards
for Laboratory Accreditation.
Current edition approved Dec. 1, 2022June 1, 2023. Published December 2022June 2023. Originally approved in 1988. Last previous edition approved in 2022 as
C1093 – 22.C1093 – 22a. DOI: 10.1520/C1093-22A.10.1520/C1093-23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
C1093 − 23
C470/C470M Specification for Molds for Forming Concrete Test Cylinders Vertically
C780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C1019 Test Method for Sampling and Testing Grout for Masonry
C1072 Test Methods for Measurement of Masonry Flexural Bond Strength
C1232 Terminology for Masonry
C1314 Test Method for Compressive Strength of Masonry Prisms
C1506 Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters
C1552 Practice for Capping Concrete Masonry Units, Related Units and Masonry Prisms for Compression Testing
C1716/C1716M Specification for Compression Testing Machine Requirements for Concrete Masonry Units, Related Units, and
Prisms
E4 Practices for Force Calibration and Verification of Testing Machines
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definitions:
3.1.1 quality system—the organizational structure, responsibilities, procedures, processes, capabilities, and resources for
implementing quality management.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 agency—the organization engaged to test masonry materials as required by a specification or contract.
3.2.2 quality system manual (QSM)—a manual describing and documenting an agency’s quality system.
3.2.3 user—the person or organization engaging the agency to provide tests; or using this practice to evaluate or accredit the
agency.
3.3 For additional terms used in this standard, refer to Terminology C1232.
4. Significance and Use
4.1 This practice provides the basic minimum criteria for use in evaluating the qualifications of testing agencies for masonry
materials. The criteria may be supplemented by more specific criteria and requirements. It can be used as a guide for internal audits
by individual users.
4.2 The intent of this practice is to provide a consensus basis for evaluating a testing agency, with respect to that agency’s
capability to objectively and competently provide the specific services needed by the user.
4.3 This practice may be used as a basis for accreditation.
5. Responsibilities and Duties
5.1 The agency shall ensure that only tests for which it is adequately equipped and staffed are performed.
5.2 The agency shall ensure that personnel perform only tests for which they are adequately trained, qualified, and certified in
accordance with applicable specifications.
5.3 The agency shall ensure that all equipment is properly maintained in good operating condition and is calibrated or verified as
applicable.
5.4 The agency shall perform all testing in accordance with appropriate standards and quality control criteria. Documents unique
to the user shall be furnished to the agency.
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6. General Capabilities
6.1 Laboratory Testing—The laboratory testing services of the masonry materials testing agency shall include some or all of the
following capabilities:
6.1.1 Testing of masonry units in the laboratory,
6.1.2 Testing of masonry mortars in the laboratory, and
6.1.3 Testing of aggregates for compliance with specification requirements.
NOTE 1—Since the requirements for construction control can vary from project to project depending upon the nature of the type, location, and intended
use of the masonry in the project, the capability of the agency for testing should be that necessary to accomplish construction control for the user’s specific
project or special requirements.
7. Personnel Qualifications
7.1 Management and Supervision—All relevant testing services shall be provided under the Full-Time technical direction of a
registered professional Engineer, with at least five years of experience in inspecting and testing masonry materials or a person of
equivalent science-oriented education and experience.
7.2 Supervising Technician—The supervising technician(s) shall have at least five years experience performing tests on materials,
with at least two years testing masonry materials.
7.2.1 Personnel supervising laboratory testing shall have current certification(s). The certification(s) shall conform to the
requirements in 7.4. Certification is not required for test methods listed in 7.2.1.1 that are outside of the scope of the testing agency.
7.2.1.1 The certification(s) shall include a written examination and performance examination for the following standards: Test
Methods C140/C140M, C780, C1019, and Practice C1552. Certification(s) for laboratory testing shall include a written
examination for the following standards: Specification C270 and Test Method C1314.
7.2.2 Personnel supervising field testing shall have current certification(s). The certification(s) shall conform to the requirements
in 7.4. Certification is not required for test methods listed in 7.2.2.1 that are outside of the scope of the testing agency.
7.2.2.1 The certification(s) shall include a written examination and performance examination for the following standards: Test
Methods C140/C140M, C780, and C1019. The certification shall include a written examination for the following standard: Test
Method C1314.
7.3 Technicians—Personnel performing laboratory and field testing shall possess current certifications that include each standard
identified in 7.3.1 and 7.3.2, and shall conform to 7.4. Certification is not required for test methods listed in 7.3.1 and 7.3.2 that
are outside of the scope of the testing agency.
7.3.1 Certification(s) for laboratory testing shall include a written examination and performance examination for the following
standards: Test Methods C140/C140M, C780, C1019, and Practice C1552. Certification(s) for laboratory testing shall include a
written examination for the following standards: Specification C270 and Test Method C1314.
7.3.2 Certification(s) for field testing shall include a written examination and performance examination for the following
standards: Test Methods C140/C140M, C780, and C1019. Certification(s) for field testing shall include a written examination for
the following standard: Test Method C1314.
7.4 The technician certification program shall meet the following criteria:
7.4.1 The written examination shall cover the test method or practice, including, as applicable: the significance of the test or
practice, sampling and specimen preparation procedures, calculations, and reporting of results,
7.4.2 The performance examination shall include a demonstration of the test method or practice, to document the technician’s
ability to correctly perform the procedure in accordance with the standard, and
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7.4.3 The written and performance examinations shall include all relevant test methods that are listed in the section above for the
type of technician being certified.
7.4.4 The period of certification shall not exceed five years.
7.4.5 The period for which the certification is valid shall be clearly and prominently stated on any documents that attest to the
certification(s) held by the individual.
7.5 It is satisfactory for a person to fill one or more positions in an agency providing that person is qualified for each position.
NOTE 2—Established certification programs exist for Test Methods C140/C140M, C780, C1019, and Practice C1552 which include a written examination
for Specifications C270 and Test Method C1314. These should be used when applicable.
8. Quality System Criteria
8.1 The agency shall establish and implement a quality system that meets the criteria in subsections 8.2 to 8.14.
8.2 Quality System Manual (QSM)—The agency shall establish and maintain a QSM that conforms to the requirements in Section
9. Each document in the QSM shall indicate its preparation date. If a document is revised, the date of revision shall be indicated
on the document. The QSM shall be available for use by laboratory staff.
8.3 Quality System Management—The agency shall designate a person(s) having responsibility for the quality system and its
implementation. The quality manager ensures that activities are being conducted by agency staff in the manner specified in the
agency’s quality system manual and has responsibility for maintaining and revising it. This individual(s) shall have direct access
to top management (see Note 3).
NOTE 3—This individual(s) may have other responsibilities (for example, laboratory manager).
8.4 Laboratory Procedure Manual—A written laboratory procedure manual outlining the method or inspection procedure for each
test or service performed by the laboratory.
NOTE 4—Inspection and testing procedures may reference published standards.
8.5 Equipment—The agency shall calibrate or verify all significant testing equipment associated with tests covered by the scope
of this standard which the agency performs. As a minimum, the equipment listed in 8.5.2 shall be included if it is associated with
tests performed by the agency. Applicable equipment shall be calibrated or verified at the intervals specified in the agency’s QSM.
The intervals specified in the QSM shall be no greater than those indicated in 8.5.2 (see Note 6). Newly acquired equipment
without manufacturer’s certification and equipment that has not been calibrated or verified because it has been removed from
service shall be calibrated or verified before being placed in service. The agency shall have detailed written procedures for all
in-house calibration and verification activities not addressed in standards. These procedures shall indicate the equipment required
to perform the calibration or verification. In addition to standard test method requirements, the conditions listed in 8.5.2 shall be
met.
8.5.1 Calibration and Verification Records—The agency shall maintain calibration and verification records for all equipment
specified in the QSM. Such records shall include:
8.5.1.1 Description of the equipment calibrated or verified, including identification of the specific piece of equipment using the
equipment serial number or other unique identifying designator provided by the agency (see Note 7),
8.5.1.2 Date the work was done,
8.5.1.3 Identification of individual performing work,
8.5.1.4 Identification of calibration or verification procedure used,
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8.5.1.5 The previousnext calibration or verification date and next due date,
8.5.1.6 Identification of any calibration or verification device used, and
8.5.1.7 Specific criteria required for each piece of equipment listed in 8.5.2.
8.5.2 Masonry Test Equipment:
8.5.2.1 Balances and Weights—Calibrate balances and weights at intervals not exceeding 12 months. Record shall include test
points and corresponding percentage of error.
8.5.2.2 Cube Molds and Tampers—Verify cube molds and tampers for conformance to the design and dimensional requirements
of Test Method C109/C109M. Verification for cube molds shall be performed at intervals not exceeding 30 months and verification
for tampers shall be performed at intervals not exceeding 6 months.
8.5.2.3 Compression Test Machine—Compression test machine shall conform to the applicable requirements of the test method
being performed. The machine shall have a capacity, loading range, and the appropriate heads and bearing plates for the specimens
tested. Calibrate compression testing machines in accordance with Practices E4. Record shall include test points and corresponding
percentage of error. Calibration shall be performed at intervals not exceeding 12 months.
NOTE 5—There are several test methods that contain compression machine requirements for testing of masonry products, including Test Methods
C67/C67M, C109/C109M, C140/C140M, C1314, and Specification C1716/C1716M. The relevant standard for the test being performed should be
consulted for specific compression machine requirements.
8.5.2.4 Flexural Bond Apparatus—Flexural bond apparatus shall conform to the applicable requirements of Test Method C1072.
Calibrate the load measuring apparatus in accordance with Practices E4. Record shall include test points and corresponding
percentage of error. Calibration shall be performed at intervals not exceeding 12 months.
8.5.2.5 Mechanical Shakers—Verify the period of mechanical agitation of mechanical shakers for adequacy of sieving as described
in Test Method C136/C136M. Record shall include length of time for the proper efficiency of sieving. Verification shall be
performed at intervals not exceeding 12 months.
8.5.2.6 Mixers (for Specification C270)—Inspect and verify mixers for conformance to the requirements of Practice C305.
Verification shall be performed at intervals not exceeding 30 months.
8.5.2.7 Cylindrical Molds—Cylindrical molds shall comply with the requirements of Specification C470/C470M. Record shall
include dimensions and results of water-tightness test. Verification shall be performed at intervals not exceeding 12 months.
8.5.2.8 Ovens—Verify oven settings with a verified reference temperature measuring device. Record shall include oven settings,
temperature reading at each oven setting, and adjustments if necessary. Verification shall be performed at intervals not exceeding
twelve months.
8.5.2.9 Sieve Accuracy—Verify sieve accuracy at least annually on each sieve used for sieve analysis (Test Methods C117 and
C136/C136M). Use any of the following methods of verification:
Method (1) Verification of each sieve in accordance with the procedures prescribed in the Annex of Specification E11.
Method (2) A comparison of the results of a split sample sieved on different sieve sets. Results shall be verified that a single
operator precision is within the acceptable range of two results stated in the test method.
Method (3) Participation in a sieve analysis test in an aggregate proficiency sample program. Results shall be verified for
multi-laboratory precision to be within the acceptable range of two results stated in the test method.
Each method of sieve verification shall include an inspection of the sieve cloth for punctures or obvious defects.
8.5.2.10 Temperature Measuring Device—Verify temperature measuring devices using a NIST-traceable reference temperature
measuring device. Record shall include test points and readings at test points. Verification shall be performed at intervals not
exceeding twelve months.
8.5.2.11 Timers—Verify timers for accuracy. Record shall include test points, readings at test points. Verification shall be
performed at intervals not exceeding 12 months.
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