ASTM C1072-22
Standard Test Methods for Measurement of Masonry Flexural Bond Strength

Standard No.

ASTM C1072-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM C1072-22

Scope

1.1 These test methods evaluate the flexural bond strength, normal to the bed joints, of masonry built of manufactured masonry units. Sampling and testing procedures are referenced, and terms are defined. Three different specimen fabrication methods are specified, each for a different purpose: 1.1.1 The first method is the “Test Method for LaboratoryPrepared Specimens.” Its purpose is to compare the bond strengths (under the given conditions) of masonry mortars. It could be used, for example, to check the quality of mortar products after production, or to indicate the bond strength (under the given conditions) of a mortar product without requiring the product to be tested in combination with many different units. It is not intended to represent field conditions. It uses standard concrete masonry units. Mortars are batched by weight equivalents of volume proportions and are mixed to a prescribed flow. Prisms are constructed using a jig and are bag-cured. 1.1.2 The second method is the “Test Method for FieldPrepared Specimens.” Its purpose is to evaluate the bond strength (under the given conditions) of a particular unit-mortar combination, either for preconstruction evaluation of materials or for quality control purposes during construction. Mortars are batched conventionally, and the flow is not prescribed. Prisms are constructed conventionally (no jig) and are bag-cured. 1.1.3 The third method is the “Test Method for Prisms Removed from Existing Masonry.” Its purpose is to evaluate the bond strength of unit-mortar combinations of prisms cut from existing walls. 1.1.4 The three methods are not consistent, nor are they intended to be. They are intended to be used for three different purposes. To make this clear, the three methods are presented separately. 1.1.5 Appendix X1 suggests two possible criteria for assessing the bond strength values obtained using these test methods. These possible evaluation criteria are given for illustration only and are not mandatory. 1.2 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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.

ASTM C1072-22 Referenced Document

• ASTM C1232 Standard Terminology for Masonry*， 2023-12-15 Update
• ASTM C140/C140M Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units*， 2023-12-01 Update
• ASTM C1437 Standard Test Method for Flow of Hydraulic Cement Mortar
• ASTM C1532/C1532M Standard Practice for Selection, Removal, and Shipment of Manufactured Masonry Units and Masonry Specimens from Existing Construction
• ASTM C230/C230M Standard Specification for Flow Table for Use in Tests of Hydraulic Cement
• ASTM C270 Standard Specification for Mortar For Unit Masonry
• ASTM C67/C67M Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile*， 2023-06-01 Update
• ASTM C780 Standard Test Methods for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry*， 2023-07-01 Update

ASTM C1072-22 history

• 2022 ASTM C1072-22 Standard Test Methods for Measurement of Masonry Flexural Bond Strength
• 2019 ASTM C1072-19 Standard Test Methods for Measurement of Masonry Flexural Bond Strength
• 2013 ASTM C1072-13e1 Standard Test Methods for Measurement of Masonry Flexural Bond Strength
• 2013 ASTM C1072-13 Standard Test Methods for Measurement of Masonry Flexural Bond Strength
• 2012 ASTM C1072-12 Standard Test Methods for Measurement of Masonry Flexural Bond Strength
• 2011 ASTM C1072-11 Standard Test Methods for Measurement of Masonry Flexural Bond Strength
• 2010 ASTM C1072-10 Standard Test Method for Measurement of Masonry Flexural Bond Strength
• 2006 ASTM C1072-06 Standard Test Method for Measurement of Masonry Flexural Bond Strength
• 2005 ASTM C1072-05b Standard Test Method for Measurement of Masonry Flexural Bond Strength
• 2005 ASTM C1072-05a Standard Test Method for Measurement of Masonry Flexural Bond Strength
• 2005 ASTM C1072-05 Standard Test Method for Measurement of Masonry Flexural Bond Strength
• 2000 ASTM C1072-00a Standard Test Method for Measurement of Masonry Flexural Bond Strength