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Significance and Use
5.1 The significance of this test is to determine the thermoplastic pavement marking material’s resistance to impact, under laboratory conditions. The method provides a numerical result for impact failure which can be used to assess quality and determine relative performance between materials.
5.2 When the pendulum-impact test is performed on thermoplastic pavement marking materials, the results can indicate the strength and brittleness properties helpful in researching and improving their field durability. Anyone attempting to perform this test should initially review Test Methods and Test Method ; especially the equipment setup.
5.3 The following sample preparation and testing setup method is important so inconsistencies in sample preparation do not cause more inconsistency in the results that are inherent when testing thermoplastic pavement marking materials.
1.1 This test method covers the sample preparation for cantilever beams and test methodology of thermoplastic pavement marking materials, similar to the “Izod Impact” method listed in Test Method .
1.1.1 Some methods call for results in inch pound-force (in.·lbf) as opposed to the common foot pound-force/inch (ft·lbf/in.) or Joule/meter (J/m) (energy absorbed per unit of specimen of similar cross-section). This method does not purport to cover all the issues involved with the pendulum impact of cantilever beams and suggests that Test Method and Test Methods be reviewed before this methodology is attempted.
1.1.2 Thermoplastic pavement marking materials are a highly filled polymer matrix. Depending on the formula the resulting matrix may be brittle, therefore possibly resulting in inconsistent test results.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
D883 Terminology Relating to Plastics
D4812 Test Method for Unnotched Cantilever Beam Impact Resistance of Plastics
D7307 Practice for Sampling of Thermoplastic Traffic Marking Materials
D7308 Practice for Sample Preparation of Thermoplastic Pavement Marking Materials
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E284 Terminology of Appearance
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D8160-20, Standard Test Method for Un-notched Cantilever Beam Impact Resistance (Izod Impact) Testing of Thermoplastic Pavement Marking Materials, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top