ASTM D4796-17(2022) PDF

SIGNIFICANCE AND USE 5.1 The function of this test method is to provide numerical instrumental results indicating the cohesive and/or adhesive bond strength of thermoplastic pavement marking to a specified cement brick substrate. 5.2 The use of this test method allows the user and manufacturer to control the quality of the product and make inferences about the performance of the thermoplastic pavement marking product. Results from these tests also provide information helpful in researching and developing thermoplastic pavement marking materials. 5.3 The method has been revised to be more consistent to methodology in other ASTM bond methods for coatings in Test Methods D4541, D5179, and D7234. 5.4 Strict adherence to the procedures outlined is necessary for precision of the test method. Under no conditions should the bond strength be accepted unless there is conformance to the method. SCOPE 1.1 This test method provides an instrumental means for the determination of thermoplastic pavement marking material bond strengths using cement bricks and loading fixtures. 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. 1.3 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. 1.4 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.