ASTM D3143/D3143M-19 PDF Download

The ASTM D3143/D3143M-19 standard is a test method used to determine the flash point of cutback asphalt using the Tag open-cup apparatus. It specifically applies to cutback asphalts with flash points lower than 93 °C [200 °F].

The purpose of this test method is to ensure that the asphalt cutback has been prepared with solvents that have the desired range of flammability and that the product has not been contaminated with solvents that have a lower flash point.

Note 3 emphasizes that the accuracy and reliability of the test results depend on the competence of the personnel conducting the procedure and the proper calibration and maintenance of the equipment used. Simply complying with Specification D3666, which sets criteria for competent and objective testing, is not enough to guarantee reliable results. The standard suggests following Specification D3666 or similar acceptable guidance to evaluate and control various factors affecting the reliability of the results.

The standard also includes additional notes and footnotes that provide explanatory material but should not be considered as requirements of the standard. It contains a warning about the hazardous nature of mercury and cautions against its handling. Additionally, the standard clarifies that it should only be used to measure and describe the properties of materials under controlled laboratory conditions and should not be used to assess the fire hazard or risk of materials in actual fire conditions. However, the results obtained from this test method may be used as part of a fire risk assessment that considers other relevant factors.