ASTM D4797-17 PDF Download

ASTM D4797-17 standard outlines the test methods for gravimetric analysis of white and yellow thermoplastic pavement markings. The purpose of these test methods is to determine the percentage of binder and retroreflective optics or non-retroreflective particles present in the composition of the thermoplastic pavement marking. The results obtained from these test methods can be used to assess the presence of titanium dioxide, lead chromate, and potentially organic pigments in the sample after ashing.

This standard focuses on the gravimetric analysis of the binder and hydrochloric acid (HCL) insoluble particles in white and yellow thermoplastic pavement markings. The HCL insoluble particles can include retroreflective optics such as glass beads or other retroreflective materials, as well as non-retroreflective particles like silica sand. The standard does not address the individual quantification of each component when a mixture of HCL insoluble materials is present. Instead, the user is required to visually evaluate the material obtained from this test method and report the types of materials present.

The standard does not cover the measurement of titanium dioxide or lead chromate pigments after ashing, as these measurements are detailed in other test methods (ASTM D1394 and ASTM D126, respectively). However, the standard aims to address any interference caused by organic pigments on the binder results.

The analytical procedures outlined in this standard include the determination of the percentage of binder (in Section 10) and the percentage of retroreflective optics or non-retroreflective particles (in Section 11).

In summary, ASTM D4797-17 provides standardized test methods for the gravimetric analysis of white and yellow thermoplastic pavement markings, enabling the quantification of binder and HCL insoluble particles. The standard does not address the individual quantification of different HCL insoluble materials but requires visual evaluation of the material obtained. It does not cover the measurement of titanium dioxide or lead chromate pigments but attempts to address interference caused by organic pigments.