5.1 The function of this test method is to provide numerical instrumental results indicating the bonding and/or bonding strength of the thermoplastic pavement marker to 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 to infer 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 for the accuracy of the test method. In any case, adhesion strength should not be accepted unless this method is met.

Meaning and Use of Adhesive Strength of Thermoplastic Waymarking Materials ASTM D 4776-2022

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1.1 This test method provides an instrumental means for determining the adhesion strength of thermoplastic pavement marking materials using cement bricks and loading fixtures.

1.2 Values expressed in inches to pounds shall be treated as 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, if any, safety concerns associated with its use. It is the responsibility of users 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 is based on the internationally recognized standardization principles established in the Decision on Principles for the Development of International Standards, Guidelines and Recommendations issued by the WTO Committee on Technical Barriers to Trade.