Kahulugan at paggamit

5.1 The function of these test methods is to determine the percentage of adhesive and reverse-reflected optical or non-reverse-reflected particles in a thermoplastic pavement marking composition, as defined by the applicable specific thermoplastic pavement marking manufacturing specification. Subsequent samples, due to ashing, can be used later to test for the presence of titanium dioxide, lead chromate and possibly organic pigments.

ASTM D4797-2017 Standard Test Method for Gravimetric Analysis of White and Yellow Thermoplastic Pavement Markings

Hakbang 1: Saklaw

1.1 These test methods include procedures for gravimetric analysis of adhesives and hydrochloric acid (HCL) insoluble particles in white and yellow thermoplastic pavement markings. HCL insoluble particles may be reverse-reflecting optics, such as glass beads or some other type of reverse-reflecting optics, or non-reverse-reflecting particles, such as silica sand, or any combination of two or more of these materials.

1.2 Where there is a mixture of two or more HCL insoluble substances, the standard does not address the physical separation and individual quantification of each component. Instead, it requires the user to visually evaluate the HCL insoluble material (obtained from following this test method) and report the type of material present.

1.3 This standard is not intended to address the measurement of titanium dioxide or lead chromate pigments (after ashing) detailed in test methods D1394 and D126.

1.4 This standard attempts to address the interference of organic pigments with adhesive results.

1.5 Profiling programs are displayed in the following order:

ASTM D4797-2017 Standard Test Method for Gravimetric Analysis of White and Yellow Thermoplastic Pavement Markings

1.6 Values expressed in SI units shall be considered standard. Ang mga halaga na ibinigay sa mga panaklong ay para sa sanggunian lamang.

1.7 Ang pamantayang ito ay hindi nilayon upang matugunan ang lahat ng mga alalahanin sa kaligtasan, kung meron man, na nauugnay sa paggamit nito. Responsibilidad ng mga gumagamit ng pamantayang ito na magtatag ng angkop na kaligtasan, mga kasanayan sa kalusugan at kapaligiran at upang matukoy ang pagiging angkop ng mga paghihigpit sa regulasyon bago gamitin.

1.8 Ang internasyonal na pamantayang ito ay batay sa mga internasyonal na kinikilalang pamantayan na mga prinsipyo na itinatag sa “Desisyon sa Mga Prinsipyo para sa Pag unlad ng Internasyonal na Pamantayan, Mga Patnubay at Rekomendasyon” issued by the WTO Committee on Technical Barriers to Trade (TBT) Komite.