Arti dan Tujuan
5.1 The function of these test methods is to define the percentage of adhesive and retroreflective optical elements or non-retroreflective particles in the composition of thermoplastic pavement markers, as defined in the applicable code for the manufacture of a particular thermoplastic pavement marker. Subsequent samples, due to ashing, can be used later to test for the presence of titanium dioxide, lead chromate and possibly organic pigments.

ASTM D 4797-2022 Analisis Kimia dan Gravimetri Bahan Rambu Jalan Termoplastik Putih dan Kuning Mengandung Asam Timbal dan Titanium Dioksida

Ruang lingkup
1.1 These test methods cover procedures for gravimetric analysis of adhesives and hydrochloric acid (HCL) insoluble particles in white and yellow thermoplastic pavement markings. HCL insoluble particles may be retroreflective optical devices, such as glass beads or some other type of retroreflective optical devices, or non-retroreflective particles, such as silica sand, or any two or more combinations of these materials.

1.2 This standard does not address the physical separation and separate quantification of each component in the presence of mixtures of two or more HCL insoluble materials. Instead, it requires the user to visually assess the HCL insoluble material (obtained by 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), as detailed in test methods D1394 and D126.

1.4 This standard will attempt to address the interference of organic pigments on adhesive results.

ASTM D 4797-2022 Analisis Kimia dan Gravimetri Bahan Rambu Jalan Termoplastik Putih dan Kuning Mengandung Asam Timbal dan Titanium Dioksida

1.5 The analysis process is shown in the following order:

Percentage of adhesive

Reflector optical element or

Percentage of non-regurgitated particles

1.6 Nilai yang dinyatakan dalam satuan SI harus dianggap sebagai standar. Nilai yang diberikan dalam tanda kurung hanya untuk referensi.

1.7 Standar ini tidak dimaksudkan untuk mengatasi semua masalah keselamatan, jika ada, terkait dengan penggunaannya. Pengguna standar ini bertanggung jawab untuk menetapkan keselamatan yang sesuai, praktik kesehatan dan lingkungan dan untuk menentukan penerapan pembatasan peraturan sebelum digunakan.

1.8 Standar internasional ini telah dikembangkan sesuai dengan prinsip-prinsip standardisasi yang diakui secara internasional yang ditetapkan dalam Keputusan Prinsip-Prinsip Pengembangan Standar Internasional, Pedoman dan Rekomendasi yang dikeluarkan oleh Komite Hambatan Teknis Perdagangan Organisasi Perdagangan Dunia.