Meaning and Purpose
5.1 The function of the test method is to provide numerical instrumental results indicating the bond and/or bonding strength of the thermoplastic pavement marker with the specified cement brick substrate.

5.2 The use of this test method allows users and manufacturers to control the quality of the product and make inferences about the performance of thermoplastic pavement marking products. The results of these tests also provide useful information for the research and development of thermoplastic pavement marking materials.

5.3 This method has been revised to be more consistent with other ASTM coating bonding methods in test methods D4541, D5179 and D7234.

5.4 Strict adherence to the outlined procedures is necessary to test the accuracy of the method. In any case, bonding strength should not be accepted unless the method is complied with.

ASTM D 4796-2022 “Bond Strength of Thermoplastic Road Sign Materials”

Scope of
1.1 The test method provides an instrumental means to determine the bonding strength of thermoplastic pavement marking materials using cement bricks and loading fixtures.

1.2 Values expressed in inch-pounds should be considered standard values. The values given in parentheses are mathematical transformations of SI units and are for reference only and are not considered standard.

1.3 This standard is not intended to address all safety issues, 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 to determine the applicability of regulatory restrictions prior to use.

1.4 This international Standard has been developed in accordance with the internationally recognized standardization principles established in the Decision on Principles for the Development of International Standards, Guidelines and Recommendations issued by the Committee on Technical Barriers to Trade of the World Trade Organization.